Messages

1

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: 107 Possibly Failing/Failed

« on: August 11, 2020, 06:08:30 PM »

I really like the pmdx stuff, the 126 and 107 have been exceptional, so if I have to I’ll just buy another 107, but I’m pretty handy with a soldering iron, so if I can fix this with a few components and a little bit of work all the better!  I just don’t have the electrical expertise to diagnose issue.  That’s why I’m here, and why I’m very grateful for the prompt and informative tech support.

2

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: 107 Possibly Failing/Failed

« on: August 11, 2020, 06:01:56 PM »

Ok, pwm led does definitely change brightness when going from full speed to 30% in test mode, status led blinks.  20 or so millivolts on aref to agnd, when in test mode or not.  20 or so millivolts on all three no matter what I do.

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Parallel Port breakout boards, motherboards, and dedicated accessories / Re: 107 Possibly Failing/Failed

« on: August 11, 2020, 12:22:45 AM »

My control box was in a different orientation when I built it, now it’s very difficult to see the words on the board, but one is on constantly (assuming power) and two more come on when I enter test mode, one solid and one blinks.  I’ve tried both internal reference and using aref.  I’ll measure between aref and agnd tomorrow and get back to you.  It enters test mode, but no voltage out of aout against agnd.  I’m interfacing with the g0704 motor controller, a kbic clone I believe.  Yes, I do believe the led is dimmer when I command a slower spindle speed.  Thanks very much for taking the time to help out, I’ll measure aref after work tomorrow.

4

Parallel Port breakout boards, motherboards, and dedicated accessories / Re: 107 Possibly Failing/Failed

« on: August 10, 2020, 12:59:33 PM »

The 107’s test mode ceased to function day before yesterday, same time it quit controlling the spindle.  This was the day after the motor slowed down considerably.  Makes me think something was failing.  A few millivolts on the pwm out when active.   

5

Parallel Port breakout boards, motherboards, and dedicated accessories / 107 Possibly Failing/Failed

« on: August 09, 2020, 04:48:48 PM »

So, the other day my spindle slowed way down, I hadn’t made any significant changes to the setup.  For the life of me I couldn’t get it working right again.  In desperation I hooked up the pot instead of the PWM and the motor worked fine.  I gave up for the night.  Came in this morning and now it’s not working at all!  Anyone have any troubleshooting tips?  Thanks!