#robotics Logs

Jun 15 2018

01:27 AM rue_mohr: wow
01:31 AM orlock: w0w!
01:31 AM rue_mohr: https://electronics.stackexchange.com/questions/264142/drive-a-mosfet-via-bjt
01:31 AM rue_mohr: i just modified that and got up past 1Mhz driving an irfz44
01:31 AM rue_mohr: i had to use a 555 to clean up the signal from my sig gen
01:31 AM rue_mohr: q1 = 2n7000
01:31 AM rue_mohr: d1 = 1n914
01:31 AM rue_mohr: q2 = 2n2222
01:31 AM rue_mohr: 10r from Vo to gate
01:33 AM rue_mohr: sweeeeet
01:34 AM rue_mohr: that will work nciely with my 250Khz converter in my bench supply too
03:05 AM rue_bed: https://www.avrfreaks.net/sites/default/files/P-FET%20Ideal%20Recitifier%20-%20AvrFreaks.png
03:05 AM rue_bed: huh
03:19 AM Jak_o_Shadows: Had to bloody argue, but the ebay seller finally refunded me when they setn the wrong item
03:32 AM rue_bed: did they miss by much?
03:32 AM rue_bed: yea, I been happy with aliexpress
03:32 AM rue_bed: not the same, but better
03:56 AM Jak_o_Shadows: They sent a knock-off. It still works, but it is 100% not the same item
03:57 AM Jak_o_Shadows: They kept suggesting partial refunds.
08:54 AM Jak_o_Shadows: correction: It barely works
09:27 AM rue_ is now known as rue_mohr
09:28 AM rue_mohr: sweet, so, 1Mhz fet control
09:37 AM rue_mohr: join #math
09:37 AM rue_mohr: no, no rue, try again
09:37 AM veverak: :D
08:36 PM rue_mohr: grrr, the next set of bearings I got are also not 623zz, but their really close
08:36 PM rue_mohr: the 3mm hole is too big
10:24 PM rue_bed: ok, so my vaccation goal is to further my resources towards independence
10:25 PM rue_bed: so, things like building a cnc
10:25 PM rue_bed: or a 12' mecha
10:25 PM rue_bed: or a system for growing radishes
10:26 PM rue_bed: wonder what happened to the patio guy
10:27 PM rue_bed: so, I got up enough speed swtiching mosfets to get a clean 1Mhz squarewave
10:27 PM rue_bed: so, class D constant current motor driver
10:28 PM rue_bed: er, well, current mode motor driver
10:29 PM rue_bed: work on the roof solar
10:29 PM rue_bed: thats a good one
10:31 PM rue_bed: ok, definitly want to work on the mecha aerotrim
10:31 PM rue_bed: hmm, code project would be good too
10:32 PM rue_bed: maybe I should get that new video card
10:35 PM rue_bed: hmm, "what are my costs" and reduce them
10:38 PM rue_bed: I need a logbot
10:38 PM rue_bed: wonder if I can get tobbor back up
10:38 PM rue_bed: hum.
10:38 PM rue_bed: need water and power
10:40 PM rue_bed: so I should fix the boiler
10:51 PM Tom_L: quite a list
10:56 PM rue_bed: there are 3 types of tasks
10:57 PM rue_bed: those which bring you back to zero, those which maintain you at zero, and those that help you get ahead of zero
10:57 PM rue_bed: the goal is ahead
10:58 PM rue_bed: which I cant alwyas do, because I'm trying to maintain and recover all the time
10:58 PM rue_bed: I need to start making exponential progress
10:58 PM rue_bed: which means I need the things I do to do things for me
10:58 PM Tom_L: or focus better
10:59 PM Tom_L: intead of multithread be like dos
10:59 PM rue_bed: I dont usually have the time to focus for long enough to design those things
10:59 PM rue_bed: so, doing dishes, this is maintaining zero
10:59 PM rue_bed: fixing a broken window is getting back to zero
10:59 PM rue_bed: improving house insulation is getting ahead of zero
11:01 PM rue_bed: so what can I do to lighten or help with the load
11:02 PM rue_bed: things that make or save money
11:02 PM rue_bed: so, whats costing
11:02 PM rue_bed: power, for sure
11:02 PM rue_bed: land tax
11:04 PM Tom_L: that should eventually put garfield back on the map
11:04 PM Tom_L: z asked for it
11:04 PM rue_bed: oh, thanks
11:04 PM Tom_L: but you don't see joins or parts
11:05 PM rue_bed: na
11:05 PM Tom_L: did it go into garfield?
11:05 PM rue_bed: just took a peak, thanks
11:06 PM rue_bed: phone...
11:07 PM Tom_L: hopefully the index will regenerate at midnight
11:08 PM rue_mohr: oh, maybe I should automate the tea machine
11:08 PM rue_mohr: I worked out that i can know if there is water in it by the speed of the termal cycle
11:10 PM Tom_L: https://www.ebay.com/itm/Brushless-DC-BLDC-Motor-Speed-Control-1100W-6000rpm-CNC-Sieg-X2-X3-BF20-G0704/153059732033?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160727114228%26meid%3Df34561582d3e4744b7ddbd3c9dfe4fb5%26pid%3D100290%26rk%3D1%26rkt%3D4%26sd%3D153059732033%26itm%3D153059732033&_trksid=p2060778.c100290.m3507
11:11 PM Tom_L: do you see any indication there that it may be analog controlled?
11:11 PM Tom_L: the guy is an idiot and didn't know a thing
11:11 PM Tom_L: the other option is +-10v or modbus and i don't wanna try that
11:12 PM Tom_L: too much to rewire
11:16 PM rue_mohr: https://www.aliexpress.com/item/EU-Ship-Free-VAT-Nema34-8N-m-Closed-Loop-Servo-motor-6A-L-116mm-2HSS86H-Hybrid/32673616938.html
11:16 PM rue_mohr: I cant find that driver pcb yet
11:18 PM Tom_L: what's the input voltage?
11:18 PM Tom_L: says AC in
11:18 PM rue_mohr: no the motor looked close
11:18 PM rue_mohr: its not
11:18 PM Tom_L: i want one that's 110 - 220vac input
11:19 PM rue_mohr: https://www.ebay.com/itm/Brushless-DC-BLDC-Motor-Speed-Control-1100W-6000rpm-CNC-Sieg-X2-X3-BF20-G0704/153059732033
11:19 PM Tom_L: alibaba has one also but they don't answer emails
11:19 PM rue_mohr: thats better
11:19 PM Tom_L: but the guy doesn't know if it's analog input
11:19 PM Tom_L: i emailed him
11:20 PM rue_mohr: all that comes up when I look for your motor is scooter motors
11:20 PM Tom_L: and a guy on another channel has one and also a 2kw one and he said they're way below rated values
11:20 PM Tom_L: it's hard to find anything
11:20 PM Tom_L: i've been trying a while
11:21 PM rue_mohr: I'm looking for any other listing just wit that motor controller
11:21 PM Tom_L: https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=Brushless+DC+BLDC+Motor+%26+Speed+Control+1100W
11:22 PM Tom_L: https://www.alibaba.com/product-detail/Syil-X5-1-5hp-6000RPM-Spindle_1891732464.html?spm=a2700.8267363.like.7.59263e5fbLwcu3
11:22 PM rue_mohr: nothing in aliexpress tho
11:23 PM Tom_L: that one's 0-10v but i can't get a quote from them
11:24 PM Tom_L: when you go to china, bring me one back mkay?
11:25 PM Tom_L: after you confirm it's working
11:25 PM rue_mohr: nothing after nothing
11:26 PM Tom_L: does that control look the same as the ebay one?
11:26 PM rue_mohr: nope
11:26 PM rue_mohr: rectifier is in a different place and cap count dosnt' match
11:27 PM Tom_L: the other choice is $500 for a commercial servo / amp
11:27 PM Tom_L: i'm sure that would work but would require considerable rewiring
11:28 PM Tom_L: the alibaba one doesn't give the cable lengths either
11:29 PM Tom_L: err 1.5m nevermind
11:29 PM Tom_L: that's kinda short
11:29 PM Tom_L: i could make it work but it's short
11:29 PM Tom_L: what's that about 5 ft?
11:30 PM rue_mohr: everyone is using boxed controllers
11:30 PM Tom_L: what do you mean?
11:30 PM Tom_L: VFD?
11:31 PM rue_mohr: https://www.aliexpress.com/item/EU-SHIP-Free-VAT-3KW-Square-Air-Cooled-Spindle-Motor-ER20-3KW-VFD-Inverter-220V/32817097942.html
11:31 PM rue_mohr: everythign is like that
11:31 PM Tom_L: those are VFD for spindle drive
11:32 PM Tom_itx: http://www.dmm-tech.com/
11:33 PM rue_mohr: no I think its too big for ali express
11:33 PM Tom_L: those guys have the other servo i was looking at
11:33 PM Tom_L: you can find small ones
11:33 PM Tom_L: ~1kw or ~2kw would work probably
11:33 PM Tom_L: but i don't know about the motor types
11:33 PM Tom_L: that last link is an AC servo
11:33 PM Tom_L: not DC
11:34 PM Tom_L: 3 phase
11:34 PM Tom_L: iirc
11:34 PM Tom_L: 120 - 220v mains input
11:34 PM Tom_L: requires some internal setup but so do those VFDs
11:37 PM Tom_L: that dmm company is up near you i think
11:42 PM Tom_L: https://www.alibaba.com/product-detail/Optimum-1-5hp-6000RPM-Spindle-BLDC_60688514181.html?spm=a2700.8267363.like.10.59263e5fbLwcu3
11:42 PM Tom_L: found it in the plastic case
11:44 PM Tom_L: well it's hard to say... they use the same pictures for everything
11:47 PM rue_shop3: not same controller I dont think
11:48 PM Tom_L: both indicate 0-10v analog control
11:49 PM Tom_L: industrial standard is -10 +10
11:49 PM Tom_L: mine is 0-10
11:51 PM rue_shop3: it might be the same
11:51 PM rue_shop3: often 0-20mA is same as 4-20 with different tuning