Topics

1

Show and Tell / Cnc knee mill

« on: February 17, 2016, 12:24:51 AM »

This is an old jetmatic knee mill from the 80s. It weighs over 2 tons I think. When I purchased the machine, it was completely stock, with the old microteck control system. It read g code off of a casset tape player. It came with nema 42 steppers with hall effect style encoders on the motors. I completely gutted about 200 lbs of electronics out of the cabinets and replaced them with three hybrid stepper drivers from leadshine. The encoders were swapped out for 1000 line disc hubs and readers from US digital. There is a 5 hp rotary phase converter in one of the cabinets.  The new drivers and a pmdx 422 board in the other cabinet. The swing arm will have a control box with a 22" touchscreen mounted on it soon. So far, with great help from the pmdx forum, the machine is completely operational. Just a little more add-ons and it will be done.

I will follow up when finished

2

SmartBOB controllers and dedicated accessories / Driver disabling 422

« on: December 20, 2015, 12:39:44 AM »

32 bit Mach 4 ver 2.2803
Smartbob 33.159
64 bit win 8
422 board
Leadshine esdh1208 drivers
Set up in sinking configuration where +5 is provided to driver from 422

Problem:

When I plug the usb I have power and lights are normal. Red is steady and green blinks slowly. Both power and enable led are lit up when enabled on screen. Jumper is removed, but main estop still doesn't do anything.

When I power on the drivers, the enabled light goes out. This happens when I have the ground connected on the limit switches " pins 11 12 13 "  which they are open anyway! So it shouldn't matter. However

If I leave the switches ungrounded, the enable light does stay on when drivers are powered up. Regardless, there is no movement when jogged. The dro does display movement.

As for the wiring, it is simple and straight forward. The enable function on the drivers is left unconnected, which is reccomended. There is an alarm + - configuration left unwired as well, is this nesesary? If so, how should it be configured on the 422?

Any help would be greatly appreciated.
Thanks