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[00:01:38] <rue_shop5> ?
[00:01:51] <^kat^> you missed the reference!?!
[00:01:56] <^kat^> oh my dog!
[00:02:33] <^kat^> it's a Beatles reference (i get by with a little helpfrom my friends)
[00:02:41] <rue_shop5> oh I just read the whole thing :)
[00:02:42] <rue_shop5> sorry
[00:02:44] <rue_shop5> :)
[00:02:46] <rue_shop5> good catch
[00:02:58] <^kat^> thanks :-)
[00:03:32] <rue_shop5> I'm wondering if zhanx is gonna get fired for being incompitent or slip someting in the boses drink to make him ill a few days so zhanx can get some work done
[00:04:44] <rue_shop5> 5 phase, 10 wire, stepper motor driver, 20 transistors
[00:04:54] <rue_shop5> 5 sense resistors,
[00:05:16] <rue_shop5> 10 resistors for controlling currrent charge/discharge
[00:05:26] <^kat^> 5phase sounds odd, not 6?
[00:05:31] <rue_shop5> over 16 op-amps
[00:05:43] <rue_shop5> yea 5 phase, bipolar stepper
[00:05:48] <rue_shop5> its from a plotter
[00:06:03] <rue_shop5> I'm checking out its drivers
[00:06:32] <rue_shop5> 5.5"x7.5" board drives 1 stepper
[00:06:37] <^kat^> yeow, lotts support chips, you sure it's worth it?
[00:08:27] <rue_shop5> I was trying to see how it was designed
[00:09:17] <rue_shop5> there is this little issue where, during current regulation, the motor is being backdriven and generates power, so cant be current controlled with a half totem driver
[00:10:23] <rue_shop5> I have a 3x SLA7024 board, but that is a current controlled driver and dosn't do the step sequencing
[00:10:39] <rue_shop5> I'm going in circles with driving the steppers for this new cnc
[00:11:07] <rue_shop5> maybe I should just not care about speed and drive them the old simple way
[00:11:14] <rue_shop5> I have fancy drivers comming
[00:11:22] <rue_shop5> from china, at $6 ea
[00:11:30] <rue_shop5> 5A driver baords, with microstepping
[00:12:02] <rue_shop5> your right, I should just get it going
[00:12:11] <rue_shop5> but even a lamp wasn't working for current control for me
[00:12:14] <rue_shop5> wtf
[00:12:15] <^kat^> you went all out to blow the $10 budget on this one i see
[00:12:41] * rue_shop5 hangs his head in shame
[00:12:52] <rue_shop5> its a $20 budget, and yea...
[00:13:05] <rue_shop5> (the budget isn't in usd)
[00:13:17] <^kat^> question : when a stepepr is backdriving the bridges, how do you not blow out the parasitic body diodes n the mosfets, and keep the smoke in them?
[00:13:35] <rue_shop5> there are diodes around the drivers
[00:13:50] <rue_shop5> all the sane stuff is there
[00:13:59] <rue_shop5> you know, these are 5.3V steppers
[00:14:09] <rue_shop5> I can prolly just drive them at 5V, and go slow
[00:14:15] <rue_shop5> that would get the machine up and going
[00:14:24] <rue_shop5> let me move on to other problems
[00:14:28] <^kat^> nah, drive them at 12v and current LIMIT them
[00:14:34] <rue_shop5> like that fact its been assembled backwards
[00:14:45] <rue_shop5> the current limiting isn't working
[00:14:53] <^kat^> worked great for Tom
[00:15:11] <rue_shop5> if I use a resistor, thats 7V at 1.4A x 6
[00:15:21] <^kat^> transistor
[00:15:38] <rue_shop5> the piont is, linear, its 56W
[00:15:44] <rue_shop5> er, 58
[00:15:50] <rue_shop5> damn near 59
[00:15:58] <rue_shop5> my chopper isn't working
[00:16:14] <rue_shop5> it needs a monostable or other fixed time element in it
[00:16:27] <^kat^> ok, two transistors, yank it up to 12v, then when the limiting pulls it down to 6, the lv transistor catched it, you turn off the 12v
[00:16:33] <rue_shop5> and the 5x7cm board is FULL
[00:17:08] <rue_shop5> like I said, I have good drivers on their way
[00:17:15] <rue_shop5> the goal should be to just get the machine going
[00:17:26] <rue_shop5> thats why there are steppers on it at all right now
[00:17:43] <rue_shop5> I'd like to not be defeated by the chopping current controlled driver design tho
[00:18:15] <rue_shop5> the other idea was to use one of the adjustable smps supplies from china
[00:18:28] <rue_shop5> they can have the current level set on them
[00:18:52] * ^kat^ nods
[00:19:03] <rue_shop5> http://www.ebay.com/itm/DC-DC-Buck-Converter-Module-LM2596-Constant-Current-Voltage-Adjustable-Module-/191015464867
[00:19:12] <rue_shop5> they run at 50Khz
[00:20:48] <^kat^> i found a nice quicky way to make durable face panels 2" wide for 2U or 3U rackmount box, but it's too small to put meters and knobs and jacks on :-/
[00:21:13] <^kat^> wierd, none of the pics is coming up
[00:21:39] <rue_house> your isp is interesting
[00:22:23] <rue_house> http://www.aliexpress.com/item/TB6600-DC12-45V-Single-for-Axis-Two-Phase-Hybrid-Stepper-Motor-Driver-Controller-Top-Sale/32613502038.html
[00:26:16] * ^kat^ adds that one to her watch list
[00:27:04] <^kat^> still no clue what the specs are, that whole center sectio is on a 3rd---6th party host that isn't loading or displaying
[00:30:58] <rue_house> oh, javascript
[00:31:06] <rue_house> they dont load it till you scroll, its annoying as all hell
[00:31:09] <^kat^> it is?
[00:31:17] <^kat^> i did scroll
[00:31:24] <rue_house> High current 4.5A, high voltage 45V, output short circuit for protection, superior performance!
[00:31:30] <rue_house> e of high-speed optical coupling 6N137 ensure high-speed without losing ste
[00:31:46] <rue_house> For 4.2A 42,57,86 within the two-phase / four-phase / four-wire / six-wire stepper motor.
[00:31:47] <rue_house> Automatic half current function.
[00:31:47] <rue_house> Low-pressure shut-off, overheating parking and over-current protection circuit, short-circuit protectio
[00:31:56] <rue_house> pressure, voltage, whatever
[00:31:58] <rue_house> :)
[00:32:42] <^kat^> i meant
http://www.ebay.com/itm/DC-DC-Buck-Converter-Module-LM2596-Constant-Current-Voltage-Adjustable-Module-/191015464867 , still working to get that whole page!
[00:32:49] <rue_house> oh
[00:33:03] <rue_house> Rectification: non-synchronous rectification
[00:33:03] <rue_house> Input voltage: 7V-35V
[00:33:03] <rue_house> Output Voltage: 1.25V-30V
[00:33:03] <rue_house> Output current: 3A maximum adjustable
[00:33:03] <rue_house> Conversion efficiency: 92 %(maximum)
[00:33:04] <rue_house> Switching frequency: 150 KHz
[00:33:06] <rue_house> Output ripple: 50mV (maximum) 20M-bandwidth
[00:33:08] <rue_house> Load regulation: ?0.5%
[00:33:10] <rue_house> Voltage regulation: ?2.5%
[00:33:12] <rue_house> Operating temperature: 40?to +85?
[00:33:14] <rue_house> Size: 48*23*14mm
[00:33:16] <rue_house> Package Included:
[00:33:18] <rue_house> 1 * LM2596 DC-DC Step Down Adjust Power Supply Module
[00:33:50] <^kat^> Output current: 3A maximum ,, ouch
[00:33:53] <rue_house> you have to take the ratings with a bowl of grains of rice
[00:33:59] <rue_house> its from china you know
[00:34:03] <^kat^> yeas
[00:34:45] <rue_house> I found a 100psi pressure sensor for about $1.60 this week
[00:34:56] <rue_house> but its not in a pipped vessle
[00:35:15] <rue_house> and its just a bridge, so you need an amp/adc
[00:35:55] <rue_house> I think its what the cheap tire sensors I got off ebay use
[00:36:06] <rue_house> but I'v not found a screwdriver small enough to check with
[00:36:18] <^kat^> there's some cheap on-off pressure switches on ebay, but no sensors, you gotta mind them corroding from the air AND whatever you are sensing
[00:37:41] <rue_house> http://www.aliexpress.com/item/Pressure-Sensor-MD-PS002-700KPa-pressure-tire-pressure-sensors-diffused-silicon-sensor-free-shipping/32588357662.html
[00:38:25] <rue_house> you know
[00:38:29] <rue_house> that gives me an idea
[00:38:45] <rue_house> I wonder how much silicone compresses between 0 and 100psi
[00:39:01] <rue_house> cause, if you made a cap with a silicone spacer...
[00:39:18] <rue_house> you could compress it with air pressure and it would be easy to read
[00:39:39] <^kat^> is it repeatable?
[00:39:49] <rue_house> silicone?
[00:39:53] <^kat^> yeas
[00:40:00] <rue_house> does silicone wear out?
[00:40:03] <^kat^> or will it compress and stay mashed
[00:40:43] <^kat^> put some tween two pieces of copper-clad pcb
[00:41:16] <^kat^> measure after it's set up, clamp in vise, measure, measure the next day?
[00:41:46] <rue_house> or make a pressure sensor and cycle it a lot
[00:42:00] <^kat^> can't use too much area, unless you have a way to..... ah, roll the silicone into a fabric, hang up to harden
[00:42:39] <rue_house> dosn't ahve to be
[00:42:45] <rue_house> few khz on a 555
[00:43:30] * ^kat^ nods
[00:43:46] <^kat^> factor of freq and thickness and area
[00:43:49] <rue_house> the air pressure dosn't change fast
[00:44:14] <rue_house> you have to pre-zero the menufactured ones anyhow
[00:44:45] <^kat^> heck, i seen machinery that had to have the sensors (Honeywell too) re-zeroed every day
[00:47:30] <rue_house> well, if there were a "flat baloon" in the pressure chamber, at 140psi it would be 1/100 of the volume
[00:49:11] <rue_house> what do you think the odds are that dog meat ends up in canned supermarket isles in north america?
[00:49:58] <^kat^> never, these humans WORSHIP and ADORE their gods
[00:51:03] <rue_house> if I make a disc thats 1/2" dia
[00:51:07] <rue_house> at 100psi
[00:51:31] <rue_house> 0.196350 inch ^2
[00:51:37] <rue_house> 20lbs
[00:52:28] <rue_house> thats a fair bit eh?
[00:52:59] <rue_house> circle -d 0.25
[00:52:59] <rue_house> Radius is : 0.125000
[00:52:59] <rue_house> Diameter is: 0.250000
[00:52:59] <rue_house> Circumfrence is : 0.785398
[00:52:59] <rue_house> Area is : 0.049087
[00:53:01] <rue_house> Sphere area: 0.196350
[00:53:03] <rue_house> Sphere volume: 0.008181
[00:53:07] <rue_house> 5lbs
[00:55:05] <rue_house> ah
[00:55:18] <rue_house> if I make it out of pipe fittings it wont matter
[00:55:28] <rue_house> tho, it may cost me more
[00:57:19] <rue_house> resonance freq change
[00:57:24] <rue_house> you mentioned that
[01:03:17] <^kat^> holycows, a C-141 wing spar busted in two places
[01:03:35] <rue_house> dont know a c-141
[01:03:49] <rue_house> airbus?
[01:04:00] <^kat^> it's an oversized C-130 with jet engines
[01:04:14] <rue_house> :S yea that helps
[01:04:29] <rue_house> fighter plane?
[01:04:33] <rue_house> 35 years old?
[01:04:36] <^kat^> C = cargo
[01:04:45] <rue_house> ah
[01:05:01] <rue_house> were still flying beavers and otters out here
[01:05:04] <rue_house> OLD
[01:05:32] <^kat^> hey, we are RELIABLE , not old
[01:07:51] <rue_house> damn a) its past my bedtime
[01:08:04] <rue_house> b) its ... past... ugh
[01:08:59] <^kat^> me 2
[22:02:15] <katsmeow> rue, did you get some of those 5amp psu already? can you do a quicky experiemnt ?
[22:03:42] <katsmeow> wind 10 loops thru that big open ferrite core, rectify it with some 1n4148 (or other fast diodes), and see if you can pull 100ma out of it, at what voltage
[22:04:31] <katsmeow> afk a few to see what the storms did
[22:16:10] <katsmeow> bak
[22:17:14] <zhanx> Am lurking
[22:17:25] <katsmeow> o
[22:17:35] <zhanx> Think I need food
[22:17:38] <katsmeow> from everyone?
[22:17:47] <zhanx> Life
[22:18:24] * katsmeow hands zhanx a slaice of pizza an inch thinck, with everything on it
[22:18:43] <zhanx> Yummy
[22:20:11] <rue_house> katsmeow, hu?
[22:20:29] <rue_house> oh
[22:20:47] <rue_house> I think you would get about a volt per turn
[22:21:12] <rue_house> I'd need to see if any still have the old open core, most of the new ones use a closed ferrite bobbin
[22:21:30] <katsmeow> the one you gave me url to last nite is open core
[22:21:40] <rue_house> kat, as its a buck supply, you would only get powr out of that loop if there is a current draw on the output
[22:22:05] <katsmeow> yeas, but that extra winding wold be a lower-wattage bia suply
[22:22:10] <katsmeow> and isolated, floating
[22:22:31] <rue_house> but the only time there is much of any ripple current in that core is when the output is loaded
[22:23:20] <katsmeow> ok, so i pull 100ma from the main output, and 5ma from the new winding
[22:23:30] <rue_house> I been planting beans all over the yard
[22:23:34] <rue_house> under all the trees
[22:23:37] <katsmeow> why are you talking me out of the experiment? you that lazy?
[22:23:51] <rue_house> no, I'm just approximating results
[22:23:56] <rue_house> I'm about to go to the shop
[22:24:15] <rue_house> I'll give it a try
[22:24:29] <rue_house> so I'll try it with a primary load of 100mA?
[22:25:16] <katsmeow> ok
[23:11:18] <Tom_shop> rue where'z your led sensor video?
[23:12:17] <katsmeow> ok, i just went to pay the internet bill, and it's now higher, when 2 weeks ago they told me over and over that it wasn't going up
[23:12:46] <katsmeow> i cannot pay , if they insist, i will cut off internet here
[23:13:14] <katsmeow> $74
[23:13:18] <katsmeow> per mo
[23:14:20] <Tom_shop> just like driving a car or a cellphone, they have created a necessity out of it
[23:14:55] <katsmeow> i have *2* cellphones, one is $5/mo , one is $10/mo