Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: john351 on July 07, 2010, 03:39:10 AM

Title: stepper signals from breakout board
Post by: john351 on July 07, 2010, 03:39:10 AM

I have downloaded the demo version of Mach3. I have set up the address etc. I have leds on the outputs of the breakout board.
I can toggle these individually by playing with the active logic level and they work ok.
when I go into the diagnostic mode and use the jog command the dro changes as one would expect but the
signals to the stepper motors never change.
What going wrong?
thanks

Title: Re: stepper signals from breakout board
Post by: Tweakie.CNC on July 07, 2010, 05:02:06 AM

John,

Have you set the Motor Outputs in the Ports & Pins section ?.

Tweakie.


btw. Welcome to the forum.

Title: Re: stepper signals from breakout board
Post by: john351 on July 07, 2010, 07:07:34 AM

In the motor output i have
         motor   enable   step dir  s port  d port
        x          yes        2     3     1        1
       y          yes         4     5     1       1
        z          yes        6      7    1       1

i hope this is ok

john f

Title: Re: stepper signals from breakout board
Post by: Tweakie.CNC on July 07, 2010, 08:28:33 AM

Looks good John - that's exactly the same configuration as I am using.

You say you have the port address set correctly (0x378) I am wondering if your breakout board requires an 'enable' signal. What type are you using ?

Tweakie.

Title: Re: stepper signals from breakout board
Post by: john351 on July 07, 2010, 11:05:43 AM

details of the breakout board can be found at:

http://www.nbglin.com/CNC25.htm

john

Title: Re: stepper signals from breakout board
Post by: Tweakie.CNC on July 07, 2010, 11:30:18 AM

Sorry to keep asking all these questions but what stepper driver board are you using ?.

Looking at the bob instructions as long as you have the JN1 &JN2 connected and 5Volt power applied you should be getting an output.

Tweakie.