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Author Topic: No communication between computer and controller box.  (Read 6903 times)

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Online Tweakie.CNC

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Re: No communication between computer and controller box.
« Reply #30 on: December 19, 2016, 02:24:09 AM »
Steppers look OK so it's back to the drawing board.  :-\

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

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Re: No communication between computer and controller box.
« Reply #31 on: December 19, 2016, 03:00:11 AM »
This problem has to be something so simple (and basic) that it is staring us in the face.

Have you tested the LPT cable with a multimeter (that pin1 is connected to pin 1, pin 2 to pin 2 and so on) ?

Can you attach your <your profile> .xml file (from your Mach3 folder). You need to copy the file then rename the copy to captainleeward.xml before attaching.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: No communication between computer and controller box.
« Reply #32 on: December 19, 2016, 04:43:08 AM »
Hi captainleewared,
got me stumped, given that all motors etc from the same supplier and presumably marked correctly....

The only way I can think of to check the BOB/driver combo is to disconnect the PP cable and feed pulses into
the step pin on each motor. Do you have a signal generator that can produce a squarewave at a few hundred Hz?

Some scopes have a 5V 1kHz squarewave for probe calibration, could at a pinch use that. Whatever you try don't feed the input
pins more than 5V. A 555 timer (output limited to 5V) would work to.

Craig
My wife left with my best friend...
     and I miss him!
Re: No communication between computer and controller box.
« Reply #33 on: December 19, 2016, 11:23:25 AM »
Hello Craig, I don't have those instruments nor know how to use them. now checking the cable pp and getting xml file.  Ward. will have for you by 10:00 am.
Re: No communication between computer and controller box.
« Reply #34 on: December 19, 2016, 12:30:55 PM »
Hello Fellas, checked the 25 pin connector cable all pin match their respective numbers.
attached is the xml file.  Ward.
Re: No communication between computer and controller box.
« Reply #35 on: December 19, 2016, 12:39:20 PM »
Hello Fellas,  from the motor tuning page.
steps per   = 8000
velocity       = 101.64
acceralation  =4   g s 0.0103607
step pulse  = 0      dir pulse=0   Ward.

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Re: No communication between computer and controller box.
« Reply #36 on: December 20, 2016, 01:37:02 AM »
Pleased to hear the LPT cable is OK - that's another possibility ruled out.
I don't know exactly what you attached (WinRar ?) but it was not your .xml file. The file is in your Mach3 folder named <your profile> .xml  - could you perhaps try again ?

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: No communication between computer and controller box.
« Reply #37 on: December 20, 2016, 05:09:52 AM »
Hi captainleeward,
try bumping up the step and direction pulse widths, 5us if you can't make them longer. Maybe the controller misses very short pulses.

Craig
My wife left with my best friend...
     and I miss him!
Re: No communication between computer and controller box.
« Reply #38 on: December 20, 2016, 11:37:29 AM »
Hi Tweakie,  this XML file opens in internet explorer.
Re: No communication between computer and controller box.
« Reply #39 on: December 20, 2016, 12:21:29 PM »
Hi captainleeward,
just had another thought, can you beg, borrow, steal, or worse buy another BOB, just a plain one with no built in drivers but one with LEDs
on the outputs? It would confirm whether M3/PP is producing pulses.

At the moment you can't tell. It is possible to probe the PP with a multimeter but one slip with a probe and you risk blowing the TTL inside
the PP. I try to avoid probing the PP whether with multimeter or oscilloscope unless I have insulated contacts that fit perfectly, replacing
chips on a PC mother board is a hit and miss proposition at best!

Craig
My wife left with my best friend...
     and I miss him!