Re: Upgrade Nema 17's to 23? Which stepper driver to use?
Originally Posted by
H500
The 6064 and 6600 both has a 50v max rating.
Please look again at the datasheet. The 6064 specifies a running voltage of 50 volts and that is also the max. The 6600 specifies a 50 volt "absolute maximum" but then goes on to specify a 42 volt "operation range". The 6064 doesn't say anything on the datasheet about needed to operate it as less than 50 volts.
From the 6600 datasheet:
Output withstand voltage: VCC = 8 to 42 V (operation range)
VCC = 50 V (absolute maximum ratings, maximum value)
From the 6064 datasheet
Output withstand voltage: VDSS = 50 V
Nothing about operation vs "absolute maximum"
I've personally operated a 6064 at 55 volts and 4.5 amps for several minutes using a high end CPU cooler to reduce chip heat. I was trying to kill it to see where it would die. I stopped because the motor melted the plastic mount it was in and fell out of the machine. Andrey ran his into NEMA 42 motors at 48 volts and 5 amps. His did ok until a really hot day and repeated cycling caused a spectacular failure which wiped out multiple drivers and a PC. I don't recommend that, of course. As I said, the most I would go is 48 volts and 4 amps. And with a CPU cooler.
James hosts the single best wiki page about steppers for CNC hobbyists on the net:
http://www.piclist.com/techref/io/steppers.htm Disagree? Tell him what's missing! ,o)