My turn for help with Pulse multiplier for test rig.

[irving2008]

Tbh my approach just generates n pulses for each wheel pulse at a rate that's fast enough to finish before the next wheel pulse. To vary the multiplier pulse rate to adapt for the wheel pulse rate is much more complex and I'd probably start going the software route on that (but not beaten yet). I'm assuming Dean is just testing basic motion and maybe home/limit switches. I haven't provided any acceleration control - it's only 3 chips after all (optional 4th if you want an LED to warn of overrun, ie wheel pulses too fast for multiplier), plus 2 options for multiplier control, a dip switch giving 1 - 256 or a 4 way rotary giving 1, 10, 20 & 50

[Jonathan]

Tbh my approach just generates n pulses for each wheel pulse at a rate that's fast enough to finish before the next wheel pulse.

As touched upon earlier, the 'jitter' this adds to the pulse stream will reduce the maximum feedrate somewhat as the motors wont run as smoothly. How much is hard to say, but it could be a problem...

OK, here's version 0.1 for discussion....

Direction required?