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Author Topic: halfmoon instead of circle  (Read 14042 times)

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Re: halfmoon instead of circle
« Reply #30 on: May 03, 2011, 12:09:46 PM »
ok all the unshielded wire has been replaced with absolutely no change to how it's been reacting.
 

Offline BR549

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Re: halfmoon instead of circle
« Reply #31 on: May 03, 2011, 12:22:02 PM »
Question, when you make a move say Y- does MACH show all the other axises moving as well in the DROs or does it only show that the Y axis is moving ?

One step at a time, (;-) TP

Offline Tweakie.CNC

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Re: halfmoon instead of circle
« Reply #32 on: May 03, 2011, 12:32:26 PM »
It is obviously not just a matter of replacing the cables, as you have just found.
Do you understand what I said in my earlier post about wiring loops and have you checked for and eliminated them ?
Have you tried bypassing the breakout board as suggested by Chris ?
Have you tried another PC to eliminate possible pp problems ?

Your earlier statement may perhaps be true "It's now left me with 2 possablities, it's either the bob or mach3". I think we all know it is not Mach3 so junk your BoB and replace it with a known good one, perhaps from CNC4PC http://www.cnc4pc.com/Store/osc/advanced_search_result.php?keywords=breakout+board&x=21&y=9
This is the direction I would take.

Tweakie.

Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: halfmoon instead of circle
« Reply #33 on: May 03, 2011, 01:30:51 PM »
The only thing not done is bypassing the bob (sick and tired of wiring).  There is no induction with the wires.

Offline BR549

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Re: halfmoon instead of circle
« Reply #34 on: May 03, 2011, 02:02:41 PM »
Just a thought BUT is the BOB powered up by 120vac ??  I noticed in your picture that the power lead is sitting and probably touching the incoming data line from the Printer port.  IF that is a 120vac line then that is a big nono as the 120vac will cause all sorts of problems to the data line.

What we really need to know is DOES all the dros show movement or JUST the one that is commanded to move ?

Just a thought, (;-) TP
Re: halfmoon instead of circle
« Reply #35 on: May 03, 2011, 04:34:37 PM »
In the picture it shows them close together but I did seperate them several days ago.  Just the commanded shows movement.

Offline BR549

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Re: halfmoon instead of circle
« Reply #36 on: May 03, 2011, 04:38:50 PM »
OK that kinda rules out MACH.

I would remove all the wiring for the drives and start over one drive at a time. Testing for the problem after each drive is brought back online.  What brand BOB are you using?

(;-) TP
« Last Edit: May 03, 2011, 04:45:52 PM by BR549 »
Re: halfmoon instead of circle
« Reply #37 on: May 03, 2011, 04:54:32 PM »
it's texas micro circuits, or sound logic. 
Re: halfmoon instead of circle
« Reply #38 on: May 03, 2011, 04:56:22 PM »
and yes I will do each one seperatly tomorrow and find out the results
Re: halfmoon instead of circle
« Reply #39 on: May 03, 2011, 05:16:29 PM »
did my z before quitting  here are the results  Z only moves in the -  refuses to move up

direction in z-  is 4.96v and stays at that untill it is set to move up and then it measures 0 and stays

pulse stays at 4.96 either way

common is 4.96 for z-  and 2.85 for z+