Forum

Welcome Guest 

Show/Hide Header

Welcome Guest, posting in this forum requires registration.
Pages: [1]
Author Topic: motor shield v1 coils
rooski
Newbie
Posts: 9
Permalink
Post motor shield v1 coils
on: March 8, 2015, 04:36
Quote

Ive been at this for a few hours now and i cant seem to find what coil goes to which m1-4 slot. Its very frustrating not having this info and just having my steppers grind .

i assumed it went
m1 A -A
m2 B -B
m3 a -a
m4 b -b

but this seems to just make my motors wiggle back and forth and grind. also im using 2.~v 1.2 amp steppers with 6 wires out but i have found which wire leads to which coil. and the 2 unnecessary wires. if i could get some guidance itd be much appreciated.

Thank you.
sandy
Administrator
Posts: 1317
Permalink
sandy
Post Re: motor shield v1 coils
on: March 8, 2015, 10:53
Quote

Hello, I'm afraid I've got no idea what your connection table actually indicates, do you have motors A and a or A and B or a and b? Not really clear what your notation means, what you have already tried (beyond the single wiring scheme that you know doesn't work) and what you tried from the results of googling "polargraph motor wiring" that didn't work. You're leaving us quite a lot of assumptions to make.

If you mean that you are connecting one motor to M1 and M2, and the other motor to M3 and M4, then that is correct. On each of your motors, four wires are connected to two circuits, two coils. So there are two pairs of wires that you're interested in. You have already worked out which these are, I guess. Each pair goes to one motorshield port. So

MotorA.coil1 goes to M1
MotorA.coil2 goes to M2
and
MotorB.coil2 goes to M3
MotorB.coil1 goes to M4

Above is just a restating of what you'll find in your google search, so I assume you know it already, BUT, if it's not working, I'd suggest working through some of the adafruit motorshield examples (https://learn.adafruit.com/adafruit-motor-shield) to make sure your motors actually work one at a time, you've got your power supply rigged correctly, that kind of thing.

good luck,
sn
rooski
Newbie
Posts: 9
Permalink
Post Re: motor shield v1 coils
on: March 9, 2015, 15:35
Quote

yeah sorry i was having a long day and posted that from my phone. but yes the 2nd half of what you wrote is what i was trying to say.

I have found motorA's and B's coil1 and coil2 and have hooked them up as you said but motorA just seems to grind back and forth very quickly while motorB does seem to turn somewhat but makes the same grinding sound as motorA. These motors are pulled from my reprap prusa so i know they do work, so im wondering if it might be the electronics because the chips do get very hot when trying to move them ?

they are unipolar nema 16's 2.9V 1.2 amp and im using a copy of the V1 adafruit motorshield. and i have a 12v line from an atx power supply feeding into the board through the external power connector.

Image

edit , ok still no luck so let me post all the info i have
the wires are orange, brown, black and red, yellow, white
coil1 has brown and orange as its ends and black as the common wire
coil2 has red and yellow as its ends and white as the common wire

i connect brown and orange to m1 red and yellow to m2 and leave black and white alone.

same for motor 2 but with m3 and m4.
rooski
Newbie
Posts: 9
Permalink
Post Re: motor shield v1 coils
on: March 12, 2015, 19:31
Quote

Yeah its probably because they are 2.9v motors, I somehow missed that the V1 electronics are for 12-24v. I ordered 2 new steppers from adafruit that should work perfectly with the controller so we will see. were very expensive for steppers >:(
sandy
Administrator
Posts: 1317
Permalink
sandy
Post Re: motor shield v1 coils
on: March 12, 2015, 20:10
Quote

Right o, the adafruit motorshield is good for a range of voltages, and is ok for even 2.9v. The real problem you'll have here is current, as the specs say, that shield is rated to supply 600mA continuously. So it can peak at 1200mA, but it won't be happy doing that all the time.

Low voltage steppers usually mean high current. Current is the important thing to look for, because it's more common to be able to control the voltage than it is to be able to increase the available current.

sn
Pages: [1]
Mingle Forum by cartpauj
Version: 1.0.34 ; Page loaded in: 0.055 seconds.