Superior drive

[bobbya47]

I am new to this forum. I also have no experience with stepper drives and motors. 35 years experience in electrical and HVAC controls, including PLC, VFD drive, DC drives and HMI. I also designed and supervised installation of a HVAC building managment system in part of the paper mill where I work as a electrical supervisor. I also take care of the high voltage distribution system. We generate around 150MW of our own electricity. I want to build a CNC router since I do woodworking as a hobby. I have access to 3 superior SS2000MD4 drives. The first machine I build will be just for the sake of making it work. It will probably be build with MDF using all thread as a lead screw. Unfortunately these drives are not microstepping drives. I really do not care if I get precision control with this machine. It will only be in the neighborhood of 18X24. Will these 4 amp drives be ok using half step? If I am happy with the results I want to build a 36X60 (I will have room in the shop for that). I have built a grandfather and gradughter clock out of walnut and want to build another one which will be more complicated. The CNC would help.

[H500]

Microstepping actually don't improve accuracy much at all. It's biggest benefit is that resonance is less likely to occur in your system. Resonance is when your motors vibrate and lose steps or stop turning altogether at certain speeds.

I'm not familiar with with your drive, but some use techniques (besides microstepping) to deal with resonance. Your system also might not have any problems. Since you already have the drives, it's certainly worth giving them a try.

[CJL5585]

Bobbya47
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Here is a link to the MD4 Manual. It gives all pertinent info on the drive on installation, hook-up, etc.

I am using Superior Electric SS2000MD7 microstepping drives, and can probably answer any questions relating to the MD4 units.

ftp://dagobah.kollmorgen.com/dist/Te.../400030043.pdf

The half-step mode should give you an accuracy of 1/64 of an inch or better if care is taken in the construction of your CNC.

Hope this helps.\
Jerry

[ger21]

The half-step mode should give you an accuracy of 1/64 of an inch or better if care is taken in the construction of your CNC.

Jerry

A 10tpi screw and half-stepping is 0.00025 Your machine will flex much more, and the screws will deviate more than that per foot.

[bobbya47]

Thanks for the information.