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Topics - Adriano

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WHile waiting for the ESS +BOB to come, I had the chance to check the DIR-STEP-ENA signals coming out from the XHC controller (that I'm about to get rid of) and going into my X-Y servos and Z step motor driver;
To my surprise, I discovered that contrary to what recommended by all servo and step motor drivers, all the signals have the same 0 time, which means that the start at exactly the same time....

DIR signal should instead be given a few microseconds (tipically 5 o 6) before the STEP signal;
In case ENABLE signal is used,  it should be given few microsendos before the DIR signal....

I guess that if the signals have the same start time, at least the first step may be missed by servo/driver...

So the quetion is: who is in charge of timing the signals? Mach? or the controller board?

 

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Hi everybody,

I'm new on this forum trying to find answers that I cannot get from XHC....
I'm building up a 3 axis CNC and I am at the final stages...mach3 motors, inputs and outputs setup...
No problems for the inputs, I did it with no issues...
As for the motor and general output setup I can get throu it, and hope some of you can help me...

what's are the pin numbers to put in mach3 for X-Y-Z motors??
Again, what's are the pin numbers to put into mach3 for controlling MK3-ET 3-8 outputs??

I can't get this data from any manuals, that's incredible.....

Somebody using these cards can help me?
thanks
Adrian


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