Hi All,
I recently received this machine from a fellow PM member with known DC drive issues. Machine arrived better than he described and I’m trilled to have it.
I’m picking up where he left off with trying to get the feeds to work properly. Ive traced all wires per the diagram and found them to be in the correct place. The issues is similar to the weak Z up post in where the DC drive motor seems to have very little power. Ive replaced the potentiometer with a 10k as suggested in previous posts, with no change in operation. DC motor runs only when potentiometer is all the way to one side, and is off when in slow speed setting. Still very weak in all directions, specially Z up which acts as if the motor is stalling. The rapid does speed up the drive, still weak z up. The creep in the other hand does not work. When pressing the creep button, the relay clicks but the drive motor turns off, the power up sequence must be done (blue and white together) to get it back running. I have new caps coming based on other posts, hoping that will fix the issue.
I’d like to replace the A2B board with a known good unit, the one I have has several traces redone, although they look to be in good shape, it would be nice to have a unmolested part.
If theres anyone in the NorCal area that has some knowledge of this machine I’d gladly pay you for your time to help diagnose, I’m in Oakland.
Thanks in advance
Jon
I recently received this machine from a fellow PM member with known DC drive issues. Machine arrived better than he described and I’m trilled to have it.
I’m picking up where he left off with trying to get the feeds to work properly. Ive traced all wires per the diagram and found them to be in the correct place. The issues is similar to the weak Z up post in where the DC drive motor seems to have very little power. Ive replaced the potentiometer with a 10k as suggested in previous posts, with no change in operation. DC motor runs only when potentiometer is all the way to one side, and is off when in slow speed setting. Still very weak in all directions, specially Z up which acts as if the motor is stalling. The rapid does speed up the drive, still weak z up. The creep in the other hand does not work. When pressing the creep button, the relay clicks but the drive motor turns off, the power up sequence must be done (blue and white together) to get it back running. I have new caps coming based on other posts, hoping that will fix the issue.
I’d like to replace the A2B board with a known good unit, the one I have has several traces redone, although they look to be in good shape, it would be nice to have a unmolested part.
If theres anyone in the NorCal area that has some knowledge of this machine I’d gladly pay you for your time to help diagnose, I’m in Oakland.
Thanks in advance
Jon