Stepper problem

[eurikain]

Hi guys, thanks so much for the replies. Here is the information you have requested, plus several pictures of my drivers, bob, and wiring, and also other essential information. The wiring diagram is at the end of this post.

Break out board:

5 axis break out board V5 from buildyourcnc.com:



I wired it and set up mach3 using the instructions at:
http://www.buildyourtools.com/phpBB3...php?f=8&t=2128

Stepper motors:

• 60BYGH303-13 (8 leads) from buildyourcnc.com:
  https://buildyourcnc.com/Documents/P...-13)%20(1).pdf
  
  
  
  To be noted:
  - I have them wired bipolar parallel
  - honestly, nice looking motors, quality seems to be there, I doubt they could be broken, at least not all three at the same time.
• 57BYGH8930 (4 leads: GREEN, BLUE, YELLOW, RED) from AliExpress.
  
  
  
  To be noted:
  - No data sheet provided
  - The leads don't match Nema 23 standards, but I found the wiring on some other Chinese motor with the same color code... It said: GREEN=A-; RED=A+; BLUE=B-; YELLOW=B+.
  - Here is the link to the original AliExpress item, but this probably won't be of any help:
  http://www.aliexpress.com/item/NEMA2...028971350.html
  - I think I was out of my mind when I bought this guy... but oh well, now that I have it I better use it :)

Stepper drivers:

• CW230, also from buildyourcnc.com:
  
  
  
  To be noted:
  - No information on what switch 4 and 8 are for....
  - It has CW+/- and CP+/- instead of common DIR/STEP pins
  - I wired it using the instructions at:
  http://www.buildyourtools.com/phpBB3...php?f=8&t=2128
  
  Switches are set to 2.4A and 1/8 mcs:
  SW1=0 (down)
  SW2=0 (down)
  SW3=1 (up)
  SW4=0 (down)
  SW5=1 (up)
  SW6=0 (down)
  SW7=1 (up)
  SW8=0 (down)
• FMD2740A, came with the motor I bought on AliExpress (same link as for the motor):
  
  
  
  To be noted:
  - I don't know what "Delay MD" is (switch 1 and 2). I tried slow and fast, no change in the motor behavior.
  - No information saying which if switch up = 1 or 0. There is a writing below the switches that shows a little arrow pointing down and on its left is written 0N. I assumed 0 was down, 1 was up.
  
  Switches are set to 2.5A and 1/8 mcs:
  SW1=0 (down)
  SW2=1 (UP)
  SW3=1 (up)
  SW4=0 (down)
  SW5=0 (down)
  SW6=0 (down)
  SW7=0 (down)
  SW8=1 (up)

Power supply:

36V 9.7A from buildyourcnc.com


I know this is not sufficient for all four motors, but don't worry the problem does not come from this as I have tried using only 3 or 1 motor, same issue with the noise and huge vibrations. I have actually tried several combinations: 450oz motor alone, one 425oz motor alone, all three 425oz motors together, all four motors together. Same problem, no change. Now, for the four motor working together, and to use all the 9.7A (I know I'll be underpowered, no worry I'll buy another PSU later on, I just want to make sure my motors, bob and drivers work fine first), I set the them as follow:

• 450oz motor needs 3.2A, I give it 2.5A
• 425oz motors needs 2.8A, I give them 2.4A

Total is 2.5 + 3 * 2.4 = 9.7A.

Here is the wiring diagram (note the motors model name):



Thanks so much for your help ! I hope to find what is not working right, so I can either fix it or buy some replacements.