I have a DIY CNC Router in my workshop. I actually use it for my joinery business. To clarify, I am an electrician with some very slightly above basic electronic skills.
What I do not have is the proper sense to megga a shield wire...... I installed a new 2.2Kw Spindle onto my router. Looking at the settings on the VFD, I decided to ramp up the start time. All was great. Until I had the CNC computer running at the same time. The next time I hit start on the spindle, everything, and I mean everything cut out. Thinking I had somehow induced a large surge into my system, I installed my spare, computer, control board, 4 drivers into my control area. Having three phase in my workshop, I plugged my spindle into a different outlet, one I have on a separate phase. Boom.
Long story short, I have a braided jacket covering the 3P lead that runs to my spindle. Somehow, and I couldn't see it by eye, one of the hairs from the braid was touching a phase wire inside the end of the spindle. Discovered with a meter. So, gutted that I had something dangerous in my workshop (not cool) but also gutted that I have smoked two computers, one monitor, 8 DQ542MA drivers, 2 breakout boards, ummm - thats it.
So back to my original decision to post. The attached picture is of the inside of a stepper motor driver. Its a DQ542MA. They are about US$40pc. I have put 230vac directly into the low voltage side - and I will need to work out exactly where because the BOB has optocouplers protecting it. Although the 230vac went onto the ground connection.
The drivers green LED comes on. But no longer works. Given that exactly the same fault has happened to these, I feel its worth having a go at repairing. But I need some help. Anyone up for the task with a bit of advice? Far out, I have no idea where to start.
What I do not have is the proper sense to megga a shield wire...... I installed a new 2.2Kw Spindle onto my router. Looking at the settings on the VFD, I decided to ramp up the start time. All was great. Until I had the CNC computer running at the same time. The next time I hit start on the spindle, everything, and I mean everything cut out. Thinking I had somehow induced a large surge into my system, I installed my spare, computer, control board, 4 drivers into my control area. Having three phase in my workshop, I plugged my spindle into a different outlet, one I have on a separate phase. Boom.
Long story short, I have a braided jacket covering the 3P lead that runs to my spindle. Somehow, and I couldn't see it by eye, one of the hairs from the braid was touching a phase wire inside the end of the spindle. Discovered with a meter. So, gutted that I had something dangerous in my workshop (not cool) but also gutted that I have smoked two computers, one monitor, 8 DQ542MA drivers, 2 breakout boards, ummm - thats it.
So back to my original decision to post. The attached picture is of the inside of a stepper motor driver. Its a DQ542MA. They are about US$40pc. I have put 230vac directly into the low voltage side - and I will need to work out exactly where because the BOB has optocouplers protecting it. Although the 230vac went onto the ground connection.
The drivers green LED comes on. But no longer works. Given that exactly the same fault has happened to these, I feel its worth having a go at repairing. But I need some help. Anyone up for the task with a bit of advice? Far out, I have no idea where to start.