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04-04-2012, 06:46 PM #1
Bridgeport Series II Boss 5 y-axis doesnt work
Have a Bridgeport Series II with Boss 5 control cabinet and replaced stepper motor for the Y-axis. It will attempt to move or run but just goes a 1/4 turn on pulley and stops with belt on or off. You cannot turn the motor by hand once you tried running the motor even with belt off.
04-06-2012, 10:02 AM #2
Maybe i posted this in the wrong section 75 views and no answer.
04-06-2012, 10:36 AM #3
The problems I had had with the drives were the main transistors on the axis drive boards.. I believe there's 6 of them on the board for each axis. At least a few times a year I'd have to replace one or two of them on one or two of the boards.
04-06-2012, 01:45 PM #4
Your problem is you're talking about a hobbyist machine. Not many hobbyists here. I still run a Series I BOSS mill, but the original steppers are long gone. However, from various posts I read over at the "zone", where the guys who buy old industrial machines to play with them hang out, blown transistors on the driver boards are common on these machines and will result in a motor that either doesn't turn a full rev, of diddles back and forth.
Do a Google search on "zone" and "CNC" and you should find a lot of experts well versed on these antiques.
04-06-2012, 06:50 PM #5
04-06-2012, 07:38 PM #6
You have to pull out the SMD boards(I think thats the numbers)to get to them
Your problem sounds like a final transistor is blown.
This is a common problem with these old controls.
I go thru maybe 1-2 of these a year,not hard to replace,buy a few extras you will need them
04-06-2012, 09:42 PM #7