Replace Stepper Motors in Camm3
- Hi All, my Camm3 has been running constantly for a week now,Im producing 6 x 3D machined bottle designs that are about 240mm x 97mm x 25mm. Needless to say I have to jig it length wise, but the problem is that it takes 10 hours to machine each half!
I have given up trying to get a used Roland 3200 which is 3 x quicker
they just don't come up [ well in the UK at least ]
I was wondering wether that it might be possible to change the stepper motors, now I am no electrician but having faster motors, does that mean by default they would be bigger or need more power or can I just do a straight swop if I found the right ones?
I did notice years ago that the PNC3100 had a larger x direction motor buried in the bed and the ballscrew seemed to be a finer thread?
Thanks in advance for any advice.
- The PNC-3000 has unusual motors, 400 full steps per rev. All the easily obtainable motors are 200 full steps per rev.
The reduced step angle makes them extra torque'y because the inverse square law is on your side (for a change). This is why they can get enough current to drive 'em through an RJ45 connector.
If you want to change the motors I think you have to change the drivers and use that Mach software to drive it.
Well, this is quite late, but from what I see in the schematic, it looks like you can intercept the step and direction signals quite easily. just disconnect the stock drivers from the motor and instead connect to a gecko drive or something similar.
You will need another DC power supply to drive the geckos, but you can drive them higher than the voltage you get out of the box. Since the speed of this mill is likely limited by the back emf of the motors you should be able to get much higher speed out of this setup.
I don't have my own PNC mill yet (in shipping), so take it with a grain of salt. I have built a few cnc mills though, so I am not just pulling it out of my @$$