RE: pulser for simple stepper control. I made one for zero dollars -- I already had a 555 timer chip, and my electronics scrap box had the perf board, resistors and capacitors I needed to make a simple clock generator. A slide switch allows me to select the direction, and I can adjust the clock rate with a pot.
I used the thing to run a stepper as a low-speed diamond grinder for shaping and sharpening carbide scrapers. I bought a set of 6" diamond lapping disks from a lapidary supply outfit, 150 grit up to 3,000. The low speed keeps everything cool (particularly since I run the bottom portion of the disk through a pool of water). It does a good job for me. I made a simple arbor to mount the disks using my lathe.
The ebay pulse generator looks like a good value if you're not able or willing to DIY one.
Mark
Posted by: mark.kimball2@frontier.com
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