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Author Topic: Setup issues
robt614
Newbie
Posts: 19
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Post Setup issues
on: July 26, 2013, 03:33
Quote

OK my controller is alive. But when I go to calibrate in step 1, the motor is erratic. I did the pre-calibrate step, im not sure whats happening. heres a video.

Rob Turner

http://www.architecturalperspective.com/

robt614
Newbie
Posts: 19
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Post Re: Setup issues
on: July 26, 2013, 16:06
Quote

So I googled some more...is it true that the a loop and b loop of the motor are not supposed to be connected to loop a---> 1a 2a and loop b--->1b 2b? It seemed like the obvious method.

I reconnected like this:
loop a -----> 1a/1b and loop b----> 2a/2b

Still acting weird. Damn. Do I need to adjust the pot on the pololu driver?

Rob Turner

http://www.architecturalperspective.com/

robt614
Newbie
Posts: 19
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Post Re: Setup issues
on: July 26, 2013, 16:38
Quote

Here's my pre calibration set up....http://vimeo.com/71106009

Heres the results: It will "stabilize" around 310 (also there is very little torgue at this speed, like none)

Rob Turner

http://www.architecturalperspective.com/

robt614
Newbie
Posts: 19
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Post Re: Setup issues
on: July 28, 2013, 23:00
Quote

Guess im on my own. Im going to assume the driver is bad. I have had the motors wires in all conceivable configurations now with the same jerky results. I guess this means I get to build shield #3.......unless I can unsolder the driver. I'll keep you updated.

Rob Turner

http://www.architecturalperspective.com/

Chris@Chro-
nos
Administrator
Posts: 137
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Post Re: Setup issues
on: August 2, 2013, 03:01
Quote

Hi rob, sorry, i hgave not been on here in a week, i have been super busy trying to get the lens apparatus ready for kickstarter.

it should be 1a 1b, then 2a and 2b.

The driver might not be putting out enough power for that motor as it is, use a screwdriver and turn the potentiometer about 1/4 counterclockwise and check again

if you dont hear from me and have a question that cant wait, hit me up at

projectchronoshelp@gmail.com it goes directly to me

SO far it is looking awesome!

robt614
Newbie
Posts: 19
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Post Re: Setup issues
on: August 2, 2013, 16:12
Quote

Yeah I tried that too. At all levels. The first time I did the calibration I forgot the heatsink.

Im using this motor:

http://www.phidgets.com/products.php?category=23&product_id=3307_0

Is it possible it was damaged by that and/or the fact the wiring was wrong? I hate the idea of building a new shield, again.

Rob Turner

http://www.architecturalperspective.com/

Chris@Chro-
nos
Administrator
Posts: 137
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Post Re: Setup issues
on: August 2, 2013, 19:29
Quote

it may have been damaged. i have killed at least 10 of those boards myself.

If you have a multimeter, check to be sure you are getting the proper voltage levels, it should be +5 on the logic side and +12v on the motor voltage side (vmot)

Chris@Chro-
nos
Administrator
Posts: 137
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Post Re: Setup issues
on: August 2, 2013, 19:53
Quote

As for the heatsink, if you dont have it on there it will overheat and shut off due to its thermal protection, but it should not kill the driver.

Mexicodirk
Newbie
Posts: 19
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Post Re: Setup issues
on: August 3, 2013, 00:34
Quote

black green its M1
blue red its M2
this Motor have 2.2A
its tooooo BIG for the Driver
i use one time this motor http://www.phidgets.com/products.php?category=23&product_id=3302_0 and its running a littel bit, and then turned off , overheating and too much ampre. i using this driver https://www.sparkfun.com/products/11699 .

robt614
Newbie
Posts: 19
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Post Re: Setup issues
on: August 3, 2013, 01:43
Quote

Apparently I didn't have every combination possible, just the ones that don't work, so on to the next step, here are my current setting,
Voltage on the logic side = 8.24v
Voltage on motor side = 14v
Black Green - 1a/1b
red green - 2a/2b
hspd = 80
lspd = 170
spd3 = 920 "you said this should be a lower number than lspd" the motor is very erratic when microstepping. There are only a few settings that it will not skip and stall on.
Its behaving better, I have smooth motion at lspd and hspd. Torque issue solved (im an idiot) I forgot I never tightened the coupler, was on for weeks.
Also when I start up the the motor farts a little.

Rob Turner

http://www.architecturalperspective.com/

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