I have a YCM-30 Supermax with a bandit 3 control. On power up the Y axis
rapids towards the column (-Y). The soft and hard travel limits have no effect on the movement, only pushing the E stop stops the travel. When the E stop is released the motion resumes.
To verify that the driver board was not getting a premature run command, I unplugged the y axis ribbon cable, then jogged x and z to the middle of their travels. The X and Z axis functioned normally so I pushed the E stop then plugged the y axis driver ribbon cable into the X axis.
When I released the E stop the Y axis took off again at a MUCH faster rate! I then tried to plug the X axis driver ribbon cable into the Y axis but it was too short. I then plugged the y axis ribbon cable into the Z axis. When I released the E stop button the y axis ran in a + Y direction.
Finally I plugged the Z axis ribbon cable into the Y axis and when I released the E stop nothing moved. I jogged the Z axis by pushing the Y axis hotkey and it moved a little then a lag error fault occured. I put the X and Z axis ribbon cables in their normal location and once again those two axis ran normally.
I removed the Y axis driver board. Part NO: 214-076 11 20 AMP DC Driver
any one have a schematic? I'm a novice when it comes to power electronics but I think I may have some bad power transistors.