Newbie- Looking for help

[jmschamness]

I been reading form for years. I built cnc plasma table and got it up and running, solfware mach 3. It ran good for about three days then the X axes and Y axes was running at a good clip I though it was going to crash so I hit the reset putton. After that I burn up two drivers. I got two new drives (leadshine MD556) and installed them, can't get them to move know. Checked voltage coming out of the bob 5 volt then 0 on DIR/ PUL 0 volts then 0 volts. What is volt reading on PUL sorry I don't remember. Hope someone can help.

Thanks alot

[Cartierusm]

I can't help without a ton more information, but if you hit the reset button and burned up two drives you've got a serious problem. If the system works and moves the drivers and you the voltage correct, the polarity correct and the AMPS setting correct on the drives then nothing can go wrong. The software and breakout board will do nothing to harm the drives, BOB or motors, that comes directly from Art who invented Mach 3. I know this cause I asked his a question a few years ago about Mach 3 blowing out drives and he told me what I just said above.

Sounds like there is some serious error in your wiring or something. Did you set the AMPS correctly on the drives and have the correct voltage?

[jmschamness]

Yes, the amp were set at 5.6 and the vdc 45. I reset them to match motors amp 4.5 vdc 36 and can't get them to run. what other information do you need. I'm all ears

thanks

[Cartierusm]

I don't know, you have to go through the entire system and make sure it's wired correctly. Is you PS a good one, if it's cheap it might be blowing things, what Brand of components are you using? What type of plasma cutter are you using, if you're using one that uses high frequency to start the arc that can blow electronic components.

[jmschamness]

Leadshine DM556 drivers are good for 20 vdc to 50vdc , 48vdc power supply and b.o.b. C10. The computer is home built a freind built it proably cheap. What computer would you recomend. No plasma hooked up.

[Cartierusm]

any computer should work with mach 3 if it was new in the last 5 years or so. I don't know what to tell you. If you're blowing drives then it's probably the power supply is bad or the drives or the motors are wired wrong, but if you had them working then I don't know. I would unwire everything and rewire it with only one drive and one motor and see if that is working and maybe use a 24 Volt power supply to get everything working.

[jmschamness]

I have checked and double checked the wiring many times and there is one quote on the instructions I don't understand? (connect GND in the motor driver to ground OV in the power supply of 36 or 48 Volt, connect +V in the motor driver to ground +36VDC or +48VDC in the power supply of 36 or 48 Volt)

[jmschamness]

Ok, I will remove all wires and like you said, then will connect one driver to see if I can get one to run. Thanks for your help.

[Cartierusm]

Not sure, sounds like you have bad drives or a power supply that's not working correcly. I had a Keling 48V power supply that was brand new and blew all my drives too, got them replaces because they were under warranty and never figured out if it was the drives or the power supply. I was upgrading so they would be more powerful but the motors and drives I had working for years. Then I hooked up a new power supply and it blew all the drives, got them replaced and then they blew again. Keling then let me upgrade to better drivers, for a fee, and I go a bigger power supply and nothings bee wrong since.

[millman52]

I may be off base here but if you E stopped at full speed is it possible the steppers became generators & created an over voltage situation back to the drivers & other electronics?

That don't explain why new drivers didn't fix the "No go" situation, unless it burned out something else too.