#linuxcnc Logs

May 08 2022

#linuxcnc Calendar

03:58 AM CaptHindsight[m]: installed fedora35 workstation earlier, the default desktop is some new form of Gnome, it's the worst thing I have ever seen or used since DOS 2
04:45 AM Tarehjerne1563[m: How can i control a servo closed loop with the board and adjust torque?
04:48 AM Tarehjerne1563[m: As well as run python to the mesa board instead of gcode
05:24 AM JT-Cave: morning
05:24 AM Tom_L: morning
08:11 AM silopolis[m]: ✌️
08:12 AM silopolis[m]: men I'm having an epic fight with my applications menu ! πŸ˜…
08:13 AM silopolis[m]: CNC menu disappeared, while still there in MenuLibre, but with only empty directories πŸ€”
08:14 AM JT-Cave: what did you do?
08:14 AM * JT-Cave never heard of MenuLibre
08:19 AM silopolis[m]: I wish I knew lol
08:23 AM _unreal_: silopolis[m], I've had on and off issues with the lcnc gui as well. buttons just going away or just no working.
08:24 AM _unreal_: I gave up for now on the advanced gui options and just use the default.
08:24 AM _unreal_: when I get this machine rebuilt. I'm torn between using the mesa card with lcnc or. the new planetcnc card
08:25 AM _unreal_: Mainly because I'm not sure if the new planetcnc card I have supports the linux version of the software. I just have not bothered to figure it out.
08:25 AM JT-Cave: silopolis[m], which OS?
08:32 AM silopolis[m]: LCNC Buster ISO
08:32 AM silopolis[m]: but fairly pimped πŸ˜›
09:05 AM JT-Cave: I need to install the emc buster iso to see why that guy had issues installing my mesa config tool
09:06 AM JT-Cave: trying to get a rpi3b to stream my ip cameras first
09:06 AM JT-Cave: hmm, I need to clean a path to that pc too
09:06 AM Tom_L: left a trail behind ya last time ehh?
09:12 AM JT-Cave: piles and piles of crap
09:39 AM silopolis[m]: JT-Cave: install ok on mine
09:39 AM * silopolis[m] uploaded an image: (159KiB) < https://libera.ems.host/_matrix/media/r0/download/matrix.org/QzPJwkneeFXwFNlLsuoALZwW/image.png >
09:40 AM silopolis[m]: Top menu entries look a little strange, maybe bar is too narrow ?
09:42 AM silopolis[m]: also resizing is limited to that minimum size
09:52 AM JT-Cave: some pages are pretty busy, I see you have an old version of mesaflash
09:53 AM JT-Cave: did you get a message about mesaflash being old?
09:56 AM silopolis[m]: "Mesaflash version is less than 3.4.2
09:56 AM silopolis[m]: The Mesa Configuration Tool requires 3.4.2 or later.
09:56 AM silopolis[m]: Go to https://github.com/LinuxCNC/mesaflash
09:56 AM silopolis[m]: for installation/update instructions."
09:57 AM silopolis[m]: But I hadn't seen it πŸ˜•
09:58 AM silopolis[m]: may be would better appear in something like bold red capitals or in a pop-up
10:00 AM JT-Cave: I can do a popup easy
10:02 AM JT-Cave: for something like that I need to add a don't nag me again checkbox to the popup but first I need to create a config file
10:03 AM _unreal_: so I have the perfect setup at this point from the looks of it for an independent dust shoe. I see no obstructions aside from the edges of the machine its self. so I'm going to add limit safety bars to the edges "bump" limits
10:43 AM roguish[m]: JT-Cave: did you find out what MenuLibre is?
10:45 AM Tom_L: https://bluesabre.org/projects/menulibre
10:45 AM roguish[m]: ah, thanks Tom_L
10:45 AM _unreal_: just discovered I had an error in my cad drawing. had the wrong carriages for the rail cad drawing on one of the axis
10:45 AM _unreal_: fixing now
10:45 AM _unreal_: glad I have not started any of the milling
10:46 AM _unreal_: the work part is still sitting on the little cnc
10:47 AM _unreal_: in-fact I may move it and level a little more that I have not yet.
10:47 AM _unreal_: and likely should have
10:47 AM _unreal_: just silly is all
10:49 AM _unreal_: I'm using MGN15H for the X and MGN15C for the z axis
11:28 AM silopolis[m]: <roguish[m]> "JT-Cave: did you find out what..." <- Sorry mate, I should have shared the link 😬
11:29 AM silopolis[m]: JT-Cave: pushed small PRs to mesact, hope they'll suit you πŸ™‚
12:45 PM Alicrow-phone: Connected the 7i40 to external power. Getting better voltage between 5V and ground now (4V vs 0.6V), but still no activity on HALscope
12:46 PM Alicrow-phone: I noticed that, with the encoder disconnected, I'm getting a 1 for the index and 0 for both A and B phases, which seems odd
12:48 PM pcw-home: Did you verify that the firmware is correct?
12:50 PM pcw-home: Also are you using a single 7I40 per cable? (If you are using 2, you must jumper the 7I40s properly as 0,1 and 2,3)
01:00 PM Alicrow-phone: I don't know how to check what firmware is running.
01:01 PM Alicrow-phone: Just a single 7i40 at the moment, though I have two and plan to hook them both up. And I just tried out the second 7i40
01:01 PM Alicrow-phone: Both of them give no reaction with the pull-up resistor test.
01:08 PM pcw-home: You need to program the FPGA card with firmware that matches the attached hardware
01:10 PM pcw-home: you can check the current pinout with:
01:10 PM pcw-home: sudo mesaflash --device 5i24 --readhmid
01:14 PM Alicrow-phone: Config looks good.
01:16 PM Alicrow-phone: Ran the pull-up test on the index signal, and that seems to actually react to shorting to ground.
01:25 PM _unreal_: !!!!! I just remembered I was strongly considering buying a a ballscrew z
01:25 PM _unreal_: :S
01:27 PM _unreal_: ready made Z axis
01:28 PM _unreal_: now I have purchased rails for the z and a few other parts
01:28 PM _unreal_: damn it... I did get the X/Z carrage plate that I was NOT planning on buying if I could find it free "and I did"
01:28 PM _unreal_: urr
01:28 PM _unreal_: gurr
01:32 PM Alicrow-phone: I think it's time to take the servo board out of the equation and see if I can get any readings just using a breakout board
01:33 PM roguish[m]: Alicrow-phone: be very, very careful on your grounding scheme..............
01:34 PM roguish[m]: when using external 5v power.
01:34 PM _unreal_: damn... I've purchased to many parts to not build it now
01:34 PM _unreal_: damn damn damn
01:36 PM Alicrow-phone: roguish: what do you mean?
01:38 PM _unreal_: what he means is ensure you do now have a 5V source contacting ground "short" it must use a pull UP or down resistor in the schematic
01:38 PM _unreal_: now=not
01:44 PM _unreal_: jeez. I'm going to go out of my mind with this fuck up.... I cant believe it. I could have gotten the finished heavy duty Z kit for $150. but I for some reason ordered a bunch of parts at some point for the z and new they where going to take a while. then just stuck with building the cad drawing. finally got my big plate and now realize I really f'ed my self
01:44 PM _unreal_: so much work for nothing. and I could have had a nice ballscrew setup
01:44 PM _unreal_: GURRRRR
01:45 PM Tom_L: lesson not soon forgotten
01:45 PM Alicrow-phone: Isn't shorting 5V to ground is a bad thing regardless of whether it's external power or not?
01:45 PM _unreal_: now I have to do a threaded rod for the z. NOT that, that is bad but I wanted a more fluid Z. the threaded rod with HDPE is nice but offers a lot of resistance to stay at a zero backlash. lasts for ever as with...
01:45 PM Tom_L: true but not on an input pin
01:46 PM Tom_L: you should be sure they all have a common ground
01:46 PM _unreal_: Alicrow-phone, it just has to pass via a resistor
01:46 PM _unreal_: the idea is to see a LOSS of voltage
01:46 PM _unreal_: hence 1/0
01:46 PM _unreal_: or below the thresh hold
01:47 PM _unreal_: which is I believe 1.6 ish volts
01:47 PM _unreal_: Tom_L, man I am mad at me...
01:48 PM _unreal_: well now it looks like I'm going to use that compound gear ratio nema23 adapter for sure
01:48 PM Alicrow-phone: So from what I'm gathering, when nothing is connected, it should be reading 5V? And then to change the state, the pin should be brought to ground?
01:48 PM _unreal_: I'll have to, to ensure I have enough torque, to overcome the threaded rod in HDPE and the weight of the Z.
01:48 PM Alicrow-phone: Because that's not how the encoders seem to work.
01:50 PM _unreal_: what sucks is I have to have about 3" of thread in HDPE for the 1/2"-13 or it may wear to fast. I should "SHOULD" get 100k cycles out of the Z full stroke
01:51 PM _unreal_: before the HDPE nut has any real backlash as long as its sell lubed with "super lub" and the threaded rod has had a DIE run up and down it a few times to ensure the cleanest burr free thread I can.
01:51 PM _unreal_: Alicrow-phone, it does not matter. all the motor controler cares about is a state of change
01:51 PM _unreal_: if its out of phase. it does not matter
01:52 PM _unreal_: it sjust looking for signal change
01:52 PM _unreal_: and the moment you home or set a position value. it does not matter
01:52 PM _unreal_: with out seeing a change of signal you have not input
01:53 PM _unreal_: and if it reads inverted, switch the wires done
01:55 PM Tom_L: Alicrow-phone, yes that's how it normally would be
01:56 PM Tom_L: you could also try the other way and try a pulldown in case those old encoders work that way
01:56 PM Tom_L: same R just take it to gnd
01:56 PM Tom_L: the reason i suggested a pullup is alot of encoders are open collector and the output floats
01:57 PM Alicrow-phone: I don't see how there would be a state change if the pull-up resistor is already bringing the pin to 5V. Applying 5V to the pin at that point wouldn't do anything, would it?
01:57 PM Tom_L: so you have to pull it high
01:57 PM Tom_L: nope
01:57 PM Tom_L: i'm suggesting trying a PULLDOWN this time
01:58 PM Alicrow-phone: Yeah, pull-down sounds like it might work better.
01:58 PM Tom_L: give it a try, same 1k
01:58 PM Tom_L: just move it to GND instead
01:58 PM Tom_L: since we can't find a data sheet for the encoders
02:05 PM Tom_L: Alicrow-phone, you said you saw a square wave on the O-scope right?
02:05 PM Tom_L: from the encoder A B & I
02:07 PM Alicrow-phone: The encoders are working perfectly normal they switch from 5v to 0v A&B in the expected waveform and phases, index triggers once per revolution.
02:12 PM Alicrow-phone: This is alicrows wife typing; im wondering if their might be any better way to communicate with y'all? I don't think IRC supports much voice or image messaging
02:14 PM Alicrow-phone: Just tried the pull-down resistor thing (resistor between pin and 5V, then short to ground). It read it, but I also saw a bunch of sparks when I made the connection.
02:23 PM JT-Shop: silopolis[m], I'll check them out when I push my current work
02:24 PM silopolis[m]: πŸ‘
02:26 PM pcw-home: If you see sparks, something is really wrong, a pullup or pulldown resistor should only draw a few mA so a visible spark should never happen
02:27 PM pcw-home: you will see a spark is you short out the 5V (or worse motor) power
02:27 PM pcw-home: if you
02:36 PM pcw-home: JT-Shop Mesaflash now supports the 7I96S, but there are no firmware files in the proper format yet, making those today
02:36 PM JT-Shop: ok, what was in the support files?
02:40 PM pcw-home: .hex files but those are not supported yet, only .bin files currently
02:41 PM CaptHindsight[m]: Tarehjerne#1563: "How can i control a servo closed loop with the board and adjust torque?
02:41 PM CaptHindsight[m]: As well as run python to the mesa board instead of gcode"
02:42 PM CaptHindsight[m]: Do you mean run the servo in torque mode?
02:42 PM Tarehjerne1563[m: Yes
02:42 PM Alicrow-phone: Was I supposed to use another resistor to make the connection between 5V and the input pin?
02:42 PM Tarehjerne1563[m: What does torque mode do actually?
02:42 PM pcw-home: it would be fairly simple to support those but .bin is easier since it's straight binary data like Xilinx .bit files
02:43 PM Tarehjerne1563[m: Alicrow use a resistor to down your input if its over 5v
02:43 PM pcw-home: yes, a pullup resistor means a resistor from a positive voltage to a node
02:43 PM JT-Shop: ok, great I don't have to do anything
02:43 PM CaptHindsight[m]: Tarehjerne#1563: https://linuxcnc.org/docs/2.6/html/common/python-interface.html is for 2.6 but there is a 2.8 version of the docs
02:43 PM Alicrow-phone: No, when trying the pull-down resistor, I mean
02:44 PM Alicrow-phone: Because pull-up did nothing.
02:44 PM JT-Shop: we just need to bump the release to 0.4.4 so my tool knows for sure it's using the correct mesaflash
02:44 PM pcw-home: a pulldown resistor means a resistor from ground to a node
02:44 PM Tarehjerne1563[m: Capthindsight does it work on debian 10?
02:44 PM CaptHindsight[m]: CaptHindsight: https://www.motioncontroltips.com/whats-the-difference-between-torque-mode-and-velocity-mode-in-servo-control/
02:45 PM CaptHindsight[m]: http://www.nimotion.com/knowledge/48/61.html
02:45 PM Alicrow-phone: Yeah, but then how do I trigger a state change? I'm supposed to apply 5V to the pin to change the state, right?
02:45 PM CaptHindsight[m]: Tarehjerne#1563: which version of LCNC are you using?
02:46 PM Tarehjerne1563[m: Debian 10, want the full version?
02:46 PM Tarehjerne1563[m: Was that -uname
02:46 PM CaptHindsight[m]: LinuxCNC latest stable is version 2.8 that runs on Buster/Debian 10
02:47 PM CaptHindsight[m]: a bit confusing since LCNC has a version and Debiuan plus the kernel has another :)
02:48 PM pcw-home: Alicrow-phone, if you have a pullup resistor attached, grounding the pin will change it state
02:48 PM CaptHindsight[m]: http://linuxcnc.org/2021/06/27/LinuxCNC-2.8.2 is the latest and YES you can use torque mode with it
02:48 PM Alicrow-phone: pcw-home: No, with pull-DOWN, how do I change the state?
02:48 PM CaptHindsight[m]: torque mode has been supported for >15 years
02:49 PM CaptHindsight[m]: * Tarehjerne#1563 torque mode
02:49 PM Tarehjerne1563[m: Awesome how do i configure it to torque?
02:50 PM pcw-home: Alicrow-phone by connecting it to 5V
02:50 PM CaptHindsight[m]: Tarehjerne#1563: are you using servo motors or closed loop steppers?
02:50 PM Tarehjerne1563[m: Servo, a lichuan AC servo 1kw
02:51 PM Alicrow-phone: Straight 5V, right? No resistor involved? That's what I did, and I got sparks.
02:51 PM Tarehjerne1563[m: Jez dude
02:51 PM Tarehjerne1563[m: What are you connecting it to?
02:51 PM Rayote: The encoders output a 5v signal. how is a pull-down resistor supposed to help.
02:52 PM pcw-home: Alicrow-phone: Sounds like you have the encoder connector pinout wrong
02:52 PM Tarehjerne1563[m: Yeah 5v should not cause issues anywhere
02:52 PM CaptHindsight[m]: Tarehjerne#1563: https://forum.linuxcnc.org/10-advanced-configuration/42916-servo-tuning-for-torque-mode-servo-motors-and-linuxcnc-seeking-help-for
02:53 PM CaptHindsight[m]: Tarehjerne#1563: https://gnipsel.com/linuxcnc/tuning/torque.html
02:53 PM Alicrow-phone: I tried again with power from the 50 pin connector instead of external 5 volts (and not using tweezers on terminal blocks to make the 5V connection to the pin), and didn't get sparks, but the red LEDs on the 7i40 flashed so I think they still didn't like it.
02:53 PM pcw-home: Yes, If the encoders output a 5V signal, no pullup or pulldown resistors are needed
02:53 PM Alicrow-phone: This was without the encoder connected.
02:54 PM CaptHindsight[m]: https://forum.linuxcnc.org/49-basic-configuration/27039-pid-tuning-in-torque-mode
02:54 PM pcw-home: You must have the 7I40 encoder connector pinout wrong
02:54 PM CaptHindsight[m]: https://forum.linuxcnc.org/12-milling/27653-analog-servos-torque-mode-velocity-mode-both?start=0
02:54 PM Rayote: is their an updated 7I40 encoder pinnout?
02:54 PM pcw-home: no, its always been the same
02:54 PM Tarehjerne1563[m: CaptainHindsight i am curious if there is anything needing done on the wiring front or servo controller configuration
02:55 PM CaptHindsight[m]: Tarehjerne#1563: wiring is the same for all modes
02:56 PM Rayote: it should be the same one as described in the 7I40 manual then, their are a block of 8 pins, ground on the top two, 5v on the bottom two, on the right side their is 3 pins for A, B and Index
02:56 PM Tarehjerne1563[m: Good, thanks for those resources
02:56 PM Rayote: 10 pins rather
02:56 PM pcw-home: none of the 7I40 encoder input pins will draw _any_ current if 0 through 5V is applied
02:56 PM CaptHindsight[m]: CaptHindsight: for the "controller" settings I'd have to see the docs for that "drive"
02:57 PM CaptHindsight[m]: Tarehjerne#1563: if you search the forums you will find a lot more on servo tuning and setups
02:58 PM Rayote: right, so the actual PCI card then?
02:58 PM CaptHindsight[m]: s/CaptHindsight/Tarehjerne#1563/
02:58 PM pcw-home: The 7I40 TTL inputs are pin --> 1K resistor --> 47 PF cap to Gnd --> 74HCT14 input
03:00 PM CaptHindsight[m]: CaptHindsight: some servo drives need to be configured via serial or USB port to be in one of the three modes, some are hard wired or configured for either velocity or position/torque
03:00 PM CaptHindsight[m]: s/CaptHindsight/Tarehjerne#1563/
03:00 PM pcw-home: so 0 input current unless you exceed the 0 to 5V range
03:01 PM pcw-home: I suspect maybe you have the pin numbering wrong, its
03:01 PM pcw-home: 1,2
03:01 PM pcw-home: 3,4
03:01 PM pcw-home: 5,6
03:01 PM pcw-home: 7,8
03:01 PM pcw-home: 9,10
03:02 PM pcw-home: (an even and odd row of 5 pins each)
03:02 PM Alicrow-phone: Yeah, that's not at all what we thought the pinout was
03:02 PM Rayote: 1,2 are ground, 9,10 are 5v correct?
03:02 PM pcw-home: 1 is a square pad
03:03 PM Alicrow-phone: I thought it was:
03:03 PM Alicrow-phone: 5,10
03:03 PM Alicrow-phone: 4,9
03:03 PM Alicrow-phone: 3,8
03:03 PM Alicrow-phone: 2,7
03:03 PM Alicrow-phone: 1,6
03:03 PM Rayote: Alicrow-phone you owe me a weekend holy moly
03:03 PM Tarehjerne1563[m: I am looking up that manual CaptainHindsight
03:03 PM Tarehjerne1563[m: I think it should be possible to get it to torque mode, when i put it to torque mode, can i still control the speed?
03:04 PM Tarehjerne1563[m: i'd like to somehow make it push forward super soft and slow if thats possible
03:04 PM pcw-home: Rayote 1,6 are 5V 9,10 are Gnd
03:04 PM Alicrow-phone: Sorry,
03:04 PM Alicrow-phone: 10,5
03:04 PM Alicrow-phone: 9,4
03:04 PM Alicrow-phone: 8,3
03:04 PM Alicrow-phone: 7,2
03:04 PM Alicrow-phone: 6,1
03:04 PM Alicrow-phone: Based on the labeling of "pin 1" in the diagram
03:05 PM pcw-home: IDC (flat cables) are not numbered that way
03:06 PM Tarehjerne1563[m: 3 Position control Speed Control
03:06 PM Tarehjerne1563[m: 4 Position control Torque control
03:06 PM Tarehjerne1563[m: 5 Speed Control Torque con
03:07 PM pcw-home: one even and one odd row (the wires in the cable are in 1,2,3,4 etc sequence)
03:09 PM Tarehjerne1563[m: ainPA_002... (full message at https://libera.ems.host/_matrix/media/r0/download/libera.chat/277f8ec5cec69db07e50767846cdc1539fa91665)
03:09 PM Tarehjerne1563[m: i have put everything in shelfs now as i needed desk space, but thanks for great help on this front
03:09 PM Tarehjerne1563[m: you see i am a student and i was studying for my exams
03:11 PM CaptHindsight[m]: likely 4 Position/torque mode P/T
03:11 PM Tarehjerne1563[m: when its set up in position/torque mode... how does the servo function?
03:11 PM Tarehjerne1563[m: if i send a low frequency pulse, what happens with the servo?
03:12 PM CaptHindsight[m]: the motor movement will track the analog input voltage
03:12 PM Tarehjerne1563[m: Ah, so i give it an analog voltage and the pul+ pul- controls the torque
03:13 PM CaptHindsight[m]: positive voltage will turn the motor one way and negative the other
03:13 PM Tarehjerne1563[m: I am using a 7i95 board, can this do all that?
03:14 PM CaptHindsight[m]: i forget which Mesa board is which, maybe someone else here knows :)
03:14 PM Tarehjerne1563[m: im afraid i may need a daughter board
03:14 PM Tarehjerne1563[m: http://www.mesanet.com/pdf/parallel/7i95man.pdf
03:14 PM CaptHindsight[m]: a board with analog outs for servos
03:14 PM Tarehjerne1563[m: i don't think this has that
03:15 PM CaptHindsight[m]: oh, that is a Step and Dir board vs Analog
03:16 PM CaptHindsight[m]: I have a bunch of these for analog servos http://www.mesanet.com/pdf/parallel/7i77man.pdf
03:16 PM CaptHindsight[m]: they also make a board with less analog outs
03:16 PM CaptHindsight[m]: board/s
03:17 PM Tarehjerne1563[m: i actually only need one speed
03:18 PM CaptHindsight[m]: 7I33
03:18 PM Tarehjerne1563[m: but i do need it in either direction
03:18 PM Tom_L: are we getting closer to the end yet?
03:18 PM CaptHindsight[m]: every day
03:21 PM Tom_L: just wondered if Alicrow-phone fixed it or blew it up yet
03:23 PM CaptHindsight[m]: wiring errors seem to account for the majority of new users issues
03:28 PM CaptHindsight[m]: Tarehjerne#1563: do need it to stay at a constant speed indefinitely?
03:28 PM Tarehjerne1563[m: it needs to swap direction
03:28 PM Tarehjerne1563[m: about 100 rpm is fine
03:29 PM CaptHindsight[m]: will it run continuously at 100rpm?
03:29 PM Tarehjerne1563[m: pretty much yea
03:29 PM CaptHindsight[m]: and then change direction and run at 100rpm?
03:29 PM Tarehjerne1563[m: how would i do that in torque mode?
03:30 PM CaptHindsight[m]: vs mainly from one position to another
03:30 PM Tarehjerne1563[m: dont i need to then supply it 100/2500*10v
03:30 PM CaptHindsight[m]: I'm trying to understand what you are trying to control
03:30 PM Tarehjerne1563[m: a servo
03:31 PM Alicrow-phone: If IRC had support for images (not just find an upload site and post link), I probably would have posted pics and someone would have seen our connector and realized sooner
03:31 PM Tarehjerne1563[m: making it just spin with controlled torque in two directions
03:31 PM Tarehjerne1563[m: its not for any machine per say
03:31 PM CaptHindsight[m]: motor at constant rate but torque limited?
03:31 PM Tarehjerne1563[m: yeah
03:32 PM CaptHindsight[m]: read over the difference between modes
03:32 PM CaptHindsight[m]: you might really want speed mode
03:32 PM Tom_L: Alicrow-phone, you got it working?
03:32 PM Tarehjerne1563[m: its in speed mode now, when i send pulses it changes speed, thats speed mode right?
03:33 PM Tarehjerne1563[m: i dont know a whole lot about this
03:33 PM Tarehjerne1563[m: and to change the toruqe, lets say i wanted 10 mNm of torque
03:33 PM CaptHindsight[m]: yes we both need to know more about what you are trying to do :)
03:33 PM Tarehjerne1563[m: how would one do that
03:33 PM Tom_L: naw not me
03:34 PM Tom_L: one per weekend is enough
03:34 PM Tarehjerne1563[m: I essentially want to make a servo spin in two directions, clockwise and counter clockwise with constant speed but still some accuracy on the rotation, and control the torque nicely
03:34 PM Alicrow-phone: Oh my god, it works now!
03:34 PM Tom_L: wired wrong ehh?
03:35 PM Tarehjerne1563[m: should i not be able to just connect pin 6 and 7 (torque pins) up to another input and control torque as well as direction and speed?
03:37 PM Alicrow-phone: I wasn't sure about the pinout to begin with, but I never asked and then I kind of forgot I had been confused about it.
03:37 PM Alicrow-phone: Thank you, everyone!
03:37 PM CaptHindsight[m]: I don't have the docs
03:38 PM CaptHindsight[m]: Tom_L: you solved it once again!
03:38 PM CaptHindsight[m]: 1) Did you check your wiring? 2) Did you try turning it on and off again?
03:39 PM CaptHindsight[m]: if it stays Off then you know Off works
03:46 PM CaptHindsight[m]: https://www.reddit.com/r/Machinists/comments/ukgiu4/small_hole_saturday/
03:58 PM _unreal_: has alicro gotten that controller working yet?
04:06 PM Alicrow-phone: The pinout for that connector would have made a lot more sense in my mind if the pin numbering went the way I thought it did.
04:06 PM Alicrow-phone: You'd have
04:06 PM Alicrow-phone: Ground,ground
04:06 PM Alicrow-phone: Idx,idx
04:06 PM Alicrow-phone: B,b
04:06 PM Alicrow-phone: A,b
04:06 PM Alicrow-phone: 5V,5V
04:07 PM Tom_L: A,b?
04:16 PM Alicrow-phone: Typo
04:16 PM Alicrow-phone: Meant a,a
04:17 PM Tom_L: did you end up using pullups or nothing?
04:22 PM Alicrow-phone: No resistors
04:22 PM Alicrow-phone: Just connect to the right pins, and it works fine.
04:26 PM Tom_L: better write that down..
04:31 PM XXCoder: saw one about grinder grinding a rotatry table come up in discord rss feed. cool, but got couple questions
04:32 PM XXCoder: doesnt grinder lose radius as it grinds, so wouldnt center be slightly higher than edges?
04:32 PM XXCoder: and I wonder how guy knew that its parallel to bottom of rotatary table
04:32 PM Tom_L: they use cnc grinders on tooling all the time
04:33 PM XXCoder: yeah but just was wondering, as I never used grinder lol
04:33 PM XXCoder: too bad my internship project of making 123 blocks never happened
04:33 PM _unreal_: grinders normally loose diam. and have to be re-trued
04:33 PM Tom_L: dunno but i'm sure they have some sort of compensation
04:33 PM _unreal_: and re-zeroed
04:33 PM JT-Shop: cnc grinders have automatic tools to keep the wheel flat and keep track of the diameter
04:33 PM Tom_L: or probed with a laser
04:33 PM XXCoder: jt nice
04:34 PM JT-Shop: blanchard grinders are a bit different
04:34 PM JT-Shop: they rotate the part around
04:35 PM JT-Shop: https://www.bourn-koch.com/what-is-blanchard-grinding/
04:35 PM XXCoder: https://www.reddit.com/r/Machinists/comments/ulb7bu/resurfacing_an_old_rotary_table_i_got_at_auction/
04:35 PM XXCoder: one i talk about
04:36 PM Tom_L: the owner of a machine shop here was Blanchard
04:36 PM Tom_L: Blanchat sry
04:36 PM XXCoder: oh yes why isnt guy using coolant spray?
04:36 PM _unreal_: blaaa
04:36 PM Tom_L: pretty close
04:36 PM _unreal_: I'm going to have to put "access holes
04:37 PM Tom_L: _unreal_ is building a swiss cheese machine
04:37 PM _unreal_: through the entire xz plate so I can access the HDPE nut for changing if/as needed
04:37 PM _unreal_: heh
04:37 PM _unreal_: should see the cad drawing so far for the main XZ plate
04:37 PM _unreal_: holes for all the mounts, carriages, rails other hardware
04:37 PM _unreal_: hard stop limits, limit switches
04:38 PM Tom_L: XXCoder, alot of the wheels for tooling are diamond too
04:38 PM XXCoder: nice
04:38 PM Tom_L: _unreal_, good thing cad has a magic eraser
04:38 PM Nkt[m]: Grinding will get you to tenths of a thousandth of an inch. They know the wheels wear.
04:38 PM _unreal_: dressing tool thats the damn name for those grinders
04:40 PM XXCoder: nice. well thanks guys :D
04:47 PM * JT-Shop notices it's time for his Weihenstephaner Hefe Weissbier
04:47 PM XXCoder: have fun on whatever that is
04:48 PM JT-Shop: https://www.weihenstephaner.de/en/our-beers/wheat-beer/
04:48 PM JT-Shop: I have one in the evening on weekends and holidays
04:49 PM XXCoder: nice
04:49 PM Tom_L: you should be allowed 2 on mother's day
04:49 PM JT-Shop: they are the worlds oldest brewery
04:49 PM XXCoder: i dont drink alchol but nice LOL
04:50 PM JT-Shop: brewing since 1040
04:50 PM Tom_L: bc?
04:50 PM JT-Shop: did they count backwards in bc
04:51 PM Tom_L: if they were a winery they'd have some $$$ wine by now
04:55 PM Alicrow-phone: With a surface grinder, you grind the magnetic chuck (or whatever you put your parts on) with the grinder itself, so that's how you know it's parallel to the wheel.
04:56 PM XXCoder: interesting
04:56 PM XXCoder: well pretty strightforward lol
05:12 PM * JT-Shop used to make tooling for nail machines on surface grinders
05:23 PM Rayote: https://www.youtube.com/watch?v=X2h-YgvSNx8&ab_channel=ROBRENZ
05:23 PM Rayote: Surface grinding<3 Β he is honestly a great resource to just watch for the subject on suracegrinding
05:26 PM XXCoder: great moms day project for wood shop https://www.youtube.com/watch?v=oU4e_YQZy94
05:27 PM XXCoder: Rayote: yep love him. sadly hes been quiet for quite a while now. hope hes ok
05:27 PM Rayote: ^ absolutly
06:07 PM Tom_L: XXCoder, first xtruder test: http://ruemohr.org/~ircjunk/tempimage/p1230807.jpg
06:07 PM XXCoder: injection extruder?
06:08 PM Tom_L: yup
06:08 PM XXCoder: nice
06:08 PM Tom_L: he rewound a stove element
06:09 PM XXCoder: not easy to do I guess
06:09 PM Tom_L: http://ruemohr.org/~ircjunk/tempimage/p1230797.jpg
06:09 PM XXCoder: will it be covered?
06:09 PM Tom_L: http://ruemohr.org/~ircjunk/tempimage/p1230796.jpg
06:09 PM Tom_L: i dunno
06:09 PM Tom_L: not my project
06:10 PM XXCoder: lol ok
06:15 PM Tom_L: http://ruemohr.org/~ircjunk/tempimage/p1230795.jpg
06:17 PM Tom_L: XXCoder, i just did the mold
06:17 PM roycroft: *whew* the old tool cabinet is moved
06:18 PM roycroft: i'm glad i got ahead of schedule yesterday, because moving that cabinet took *way* longer than i thought
06:18 PM roycroft: and the funny thing is, it's a lot heavier than i remember it being when i built it 20 or so years ago
06:18 PM roycroft: funny how things like that get heavier over time
06:27 PM Alicrow-phone: Think we're gonna switch from the PCI 5i24 to the Ethernet 7i80HD. Just for easier cable management.
06:28 PM XXCoder: roy yep everything get heavier
06:28 PM Alicrow-phone: 3x 50 pin ribbon cables from the computer to the Harbor Freight tech cart drawer we're putting the electronics in doesn't sound nice
06:28 PM Tom_L: i've tested one of those
06:28 PM Tom_L: works good on a rpi4
06:37 PM Alicrow-phone: They were out of stock when I ordered stuff months ago. Would have waited if I had known the mechanical stuff would take so long to get fixed.
06:43 PM Tom_L: https://www.youtube.com/watch?v=g0OLIth_cOI&t=5s
06:43 PM Tom_L: crappy video but that shows it working
06:45 PM Tom_L: upgraded spindle since that
06:57 PM flyback: https://www.ebay.com/itm/334155293057
07:43 PM _unreal_: well with the gear down ratio I'm using on everything looks like I'm going to be running whole step on these steppers
07:43 PM _unreal_: at least Z
07:43 PM _unreal_: to get as much RPM as I can out of it heh
07:47 PM Alicrow-phone: Apparently we have 4 thousandths of an inch of play in the Y axis.
07:47 PM Alicrow-phone: Probably the bearings
07:51 PM Tom_L: try to fix it physically but if that's not possible, there is backlash compensation per axis
07:52 PM _unreal_: ^^ try to fix... backlash compensation helps but does NOTHING for chatter
07:52 PM Tom_L: it's a pretty heavy machine
07:52 PM Tom_L: hurco
07:55 PM Alicrow-phone: Yeah, this thing weighs just over a ton. Bridgeport Series I
08:08 PM _unreal_: sounds like its just a drop in the fat bucket
08:14 PM _unreal_: If I do make millions in the next few months with these stocks of mine. I think I'll buy a boat and name it "i QUIT"
08:18 PM _unreal_: well I thought it was funny
08:19 PM Tom_L: what? the part about the millions?
08:22 PM _unreal_: yes
08:22 PM _unreal_: or the fat bucket
08:22 PM _unreal_: take your pick
08:22 PM _unreal_: well I'm happy, just checked one of my "aluminum" scraping scraps. its the PERFECT part. 3x3" 3/8" thick aluminum square tube
08:23 PM _unreal_: exactly what I need for a mount
08:23 PM _unreal_: could not ask for better
08:24 PM Tom_L: pretty thick extrusion
08:24 PM _unreal_: YEP
08:24 PM _unreal_: its part of these sat. systems
08:24 PM _unreal_: its the main arm that connects to the rotation base and to the entire rest of the sat. dish
08:24 PM _unreal_: but its 3x3 which is what I need exactly
08:25 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/local_stock/1.jpg
08:25 PM Tom_L: probably something there that would do..
08:25 PM _unreal_: so I can mount the "special" PART that is the pitch adapter for the dish. and use that as the main Z asembly
08:25 PM _unreal_: then just toss in the thrust bearings below on the below main mounting plate
08:26 PM _unreal_: oh more then likely
08:37 PM XXCoder: tom, dreams of hobbyist machinists lol
08:37 PM XXCoder: stock like that
08:48 PM roycroft: that's way too much meetal
08:48 PM XXCoder: heavy metal
08:48 PM XXCoder: when they heard you wanted heavy metal music, they missed the last word
08:49 PM roycroft: i've never been much of a fan of heavy metal music
08:50 PM _unreal_: or music to begin with lol
08:50 PM XXCoder: im fan of Silence. it's only music I have heard all my life
08:50 PM XXCoder: nah kidding its just silence
08:51 PM roycroft: that's patently false, _unreal_
08:52 PM * roycroft listens to music almost constantly, and is happy to be able to attend concerts again after a 2+ year hiatus
08:52 PM roycroft: i've been to three so far this year, after the january one was postponed
08:52 PM roycroft: and i have two in may and two in june, sofar
08:53 PM XXCoder: unreal honestly thats bit strange assumation. dislike of one trope of music dont mean all music
08:54 PM roycroft: and i never said i "dislike" it
08:55 PM roycroft: i said i'm not much of a fan of it
11:10 PM Alicrow-phone: Couldn't get the backlash out.
11:19 PM Alicrow-phone: It's probably in the ballscrew. The Y axis is the only one we didn't get re-ground.
11:38 PM _unreal_: being a bridge port, it can only be from a few things, the WAYS, the drive screw system, or an interconnection issue.
11:39 PM _unreal_: are the servo motors belt drive? or direct connection, or are they geared?
11:39 PM _unreal_: hopefully they are direct or belt
11:40 PM _unreal_: if the system has a large acme style drive screw and it seems to be in the screw system, then its just very worn. there may be a way to to tension, I have no idea dont know what make model.
11:40 PM _unreal_: if it is ballscrew, then its just warn out and needs to be replaced.
11:43 PM _unreal_: if it is in the X/Y track system the slides, you can do adjustments. My bet is its in the tailstock screw/nut system.
11:45 PM _unreal_: to many filings gotten into it and its lost tolerance. is the accordion guard still intact or is it ripped and failed?