Emco PC120 Turn

**Clive S** · 10-08-2017

Chaz its hard to see but if you look on the driver it gives the max voltage at bottom RH side (48V?) if so you could run them at say about 36V. Do yourself a favour and buy some decent drives like AM882 and run them at a higher voltage.

Also you don't say what PS you are using switch mode are not good for steppers.

**Chaz** · 10-08-2017

Originally Posted by Clive S

Chaz its hard to see but if you look on the driver it gives the max voltage at bottom RH side (48V?) if so you could run them at say about 36V. Do yourself a favour and buy some decent drives like AM882 and run them at a higher voltage.

Also you don't say what PS you are using switch mode are not good for steppers.

Ye, possibly around 50V.

They did work well before the previous set of PSUs died. The current PSU is one of them el cheapo ebay ones, I presume they are SMPS.

Id like to sell the lathe but need it to be 100% reliable before I do. Any suggestions on what PSU would suit if I was just going to upgrade this? Lets assume 36 or 48V max.

lll take a look at the AM882 anyways.

Thanks

**Chaz** · 10-08-2017

My best bet is probably something like this.

http://www.zappautomation.co.uk/elec...-supply-7.html

Move the drive power to this, leave the 24V supply to do the logic stuff only.

**Clive S** · 10-08-2017

Originally Posted by Chaz

My best bet is probably something like this.

http://www.zappautomation.co.uk/elec...-supply-7.html

Move the drive power to this, leave the 24V supply to do the logic stuff only.

http://www.zappautomation.co.uk/elec...-supplies.html

edit you beat me to it or build one

**Gary** · 10-08-2017

This driver is a three phase driver (For Three phase stepper motors) Looking at the part number it implies that the maximum voltage is 80V DC and the current is 6.0 A.
3 = three phase
M = Motor driver
8 = Max voltage (80V)
60 = 6.0 A maximum current.

This is the typical makeup of the part numbers.

Originally Posted by Chaz

Ye, possibly around 50V.

They did work well before the previous set of PSUs died. The current PSU is one of them el cheapo ebay ones, I presume they are SMPS.

Id like to sell the lathe but need it to be 100% reliable before I do. Any suggestions on what PSU would suit if I was just going to upgrade this? Lets assume 36 or 48V max.

lll take a look at the AM882 anyways.

Thanks

**Chaz** · 10-08-2017

Originally Posted by Gary

This driver is a three phase driver (For Three phase stepper motors) Looking at the part number it implies that the maximum voltage is 80V DC and the current is 6.0 A.
3 = three phase
M = Motor driver
8 = Max voltage (80V)
60 = 6.0 A maximum current.

This is the typical makeup of the part numbers.

Thanks Gary. I looked on your and a few other sites to try and find who makes this driver, but no such luck.

I also know little about the motors, it was all fit by someone before I bought the lathe. Not a bad job overall. The PSUs that failed looked to be fairly high end things, but voltage is only 24V.