Thanks Jeff,
I would like enough PPR to get some pulses when moving a sewing machine with the needle down.
The theory is..... there should be enough flex in the needle and material on the quilting frame to get at least a few pulses if the sewing machine is pushed in any direction.
The question is..... will 128PPR be enough given that I will be using a Picaxe at 4Mhz, but with a real instruction per cycle rate of much less than that. In addition, I will need to add code that double checks that movement actually occurred in order to avoid false starting.
I guess that one way to find out is to try it, so I'll order some and start writing the code.
If it's not too far away, I'll post the results.
Thanks for your help and URL.
Regards
Maarten VK6KCI