encoder monitorig
encoder monitorig
(OP)
i have a 1024 pulse encoder using channel a and not a feeding into a buffer card which diverts off to find a speed reference for several other machines. this reference is varying too much at the machine end, what is the best way to monitor the encoder pulses, to determine whether it is the buffer box or encoder that is faulty, being that i am sure the reference encoder coupling is ok and that it is being driven at a constant speed. (speed fluctuation is about +/- 10rpm in 1255rpm moving constantly





RE: encoder monitorig
Most of time when a encoder goes bad you can tell by looking at pulse stream.
If it is a noise/wiring problem the oscope will pick it up also.
Barry1961
RE: encoder monitorig
The pulse width trigger will pick up any glitches and show them. If it doesnt trig, then you can be sure that pulses are OK. (You will have to verify zero, amplitude and 90 degree shift first).
Gunnar Englund
www.gke.org
RE: encoder monitorig
This is quite an easy fault to find, first check your supply to the encoder with a scop pref 20mhz.It must have no spikes or noise on it, Second look at the output pulses these must be perfectly square if you under stand what i mean and have no spikes or ripples any were. check the in put and out put of your buffer look for good clean signals.
There is also one other point,have you ckecked the bearings on your encoder as bearing noise does effect encoder pulses. also what machine is it and do you have any tacos in the same system. As you will know A ataco is a generator look at the output from these if you have them these must have no ripples or spikes othere wise the drive will rampup to match that signal.also check for screen being connected one end only as both ends will cause current loops and induse noise that will cause bad signals
Barry.
RE: encoder monitorig
RE: encoder monitorig
What are you talking about he said he as a 1024 pulse encoder do-hicky.
Barry.
RE: encoder monitorig
RE: encoder monitorig
Gunnar Englund
www.gke.org
RE: encoder monitorig
Yeah and wouldn't you know it, the one time I was teasing laundry for a few spelling errors. Twas, karmic it twas.
RE: encoder monitorig