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Author Topic: No communication between computer and controller box.  (Read 6896 times)

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Re: No communication between computer and controller box.
« Reply #20 on: December 16, 2016, 01:19:10 AM »
Hi Craig, google this address to see my BOB set up. HobbyCNC " EZ Board COMBO Kit"  hobbycnc.com I added a 24 volt 15 amp power supply to run the board, cooling fan fuses ect.
where can I email my jpeg photos to you?. tried on this forum but no go. if you look on the Homemade tools .net web site in my projects folder you will find the BOB box with plenty of pictures.
« Last Edit: December 16, 2016, 01:25:02 AM by captainleeward »
Re: No communication between computer and controller box.
« Reply #21 on: December 16, 2016, 09:39:16 PM »
Hi captainleeward,
little or nothing to configure on the BOB/driver. Must assume the manufacturer knows what he is doing. I notice in the pics that the drivers are
Unipolar. Did you get your steppers from the same company? Did they give you a wiring diagram for the motor-to-driver?
Assuming the BOB/driver/motor is wired per spec the only other area that can be at fault is your settings in Mach3. Did hobbycnc provide any details
about pin outs, step/dir vs CCW/CW?.

As this board is hard wired the PP pin outs will have to conform with the BOB pins. Can you scan it?

Craig
My wife left with my best friend...
     and I miss him!
Re: No communication between computer and controller box.
« Reply #22 on: December 16, 2016, 10:12:58 PM »
here is the BOB.
« Last Edit: December 16, 2016, 10:25:20 PM by captainleeward »

Offline Tweakie.CNC

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Re: No communication between computer and controller box.
« Reply #23 on: December 17, 2016, 01:34:43 AM »
Please excuse me for asking a really basic question but are you using unipolar stepper motors and have you checked that are they connected correctly ?

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: No communication between computer and controller box.
« Reply #24 on: December 17, 2016, 03:00:41 AM »
Hello Tweakie, I don't know if they are unipolar or not the motors have 8 wires coming from them 1A 2a gnd gnd      gnd gnd  2a 1A
Yes the BOB is marked clearly where these go to, two of the grounds are soiderd together on each side.  there are 6 terminals for the motor hook up. see j peg above.
The steppers motors came with the kit BOB, the 25 pin cable came with the kit to.  Yes I have checked the wiring twice and believe it to be correct but I will recheck it Saturday and verify it..Ward
« Last Edit: December 17, 2016, 03:08:00 AM by captainleeward »

Offline Tweakie.CNC

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Re: No communication between computer and controller box.
« Reply #25 on: December 17, 2016, 03:39:05 AM »
As you purchased the steppers and controller from the same source and the wires are identified then I am sure you have the wiring correct (sorry but I just had to ask the question).

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: No communication between computer and controller box.
« Reply #26 on: December 17, 2016, 07:48:00 AM »
Hi Tweakie,

Please feel free to jump in anytime with a suggestion that might set the motors free...:O)

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Re: No communication between computer and controller box.
« Reply #27 on: December 17, 2016, 08:23:33 AM »
Still on about the steppers but I notice that your pdf manual shows two different wire color configurations for the 8 wire motors. It's an off-chance but it may be worth checking (with a multimeter) the resistance of the stepper motor windings just to confirm that you have the correct center taps for the COM connections to the controller.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: No communication between computer and controller box.
« Reply #28 on: December 17, 2016, 12:38:38 PM »
Hello Tweakie, Happy holidays.....

Yes I will check that on Monday.  Thanks for the idea.
Re: No communication between computer and controller box.
« Reply #29 on: December 18, 2016, 04:18:17 PM »
Hello Fellas, 

So I did a continuity check to the motor wiring:

A to third pin ground positive.
a to third pin ground positive.

B to forth pin ground positive.
b to forth pin ground positive.

forth and third pins  nagative.
A to a negative.
B to b negative.

no ground from the 3 and 4 ground terminals to motor chassis.

All motors chassis are grounded to each other via the double sided aluminum plywood I used
for the project.

checked all wire cable connections from motor wire to the BOB.  all ok.

Ward.