My turn for help with Pulse multiplier for test rig.

[stirling]

Hi JAZZ

When I first saw this I thought - 555 - like a couple of others here. But then I saw you really wanted a step multiplier to add to your MPG. IMHO That makes a whole world of difference over a simple step generator.

I see Irving has a plan in motion - I have to say I'll be interested to see it because whilst I think this would be fairly trivial with SOFTWARE, a purely HARDWARE solution - well - like I say I'll be interested to see it.

Just to give an idea of WHY I think there is more to this than might meet the eye. Your requirement was for a 10, 20, 50 MPG multiplier.

So at first site you might say - ok - every pulse that comes out of the MPG let's just generate 10. But what frequency does it output those pulses at? It has to do the 10 before the next MPG pulse - but it has no idea when that's coming. So you either end up with 10 pulses and then some arbitrary gap before the next MPG pulse (I forsee stepper stalling here) OR you end up getting the next MPG pulse BEFORE the 10 have finished. Oops - now we need to buffer the MPG pulses, so now we need memory.

Alternatively your hardware could wait until it's received a few pulses and follow the trend - kinda work behind the curve - again - trivial in software - but to me at least a nightmare in purely hardware.

Add to that the fact that once you get to your 50 x multiplier, maybe even before - you're going to have to start concidering accel ramps etc. etc. - frequency blending...

On the other hand of course I might be completely wrong - but at the moment I can't see it and so haven't offered anything.

If you relent and allow software - then I'll be in.

Cheers

Ian

[FatFreddie]

When I first saw this I thought - 555 - like a couple of others here. But then I saw you really wanted a step multiplier to add to your MPG. IMHO That makes a whole world of difference over a simple step generator.
Snip...

My thoughts exactly...

I'll be interested to see what Irving comes up with.