Re: [Emc-users] [Emc-developers] using an absolute encoder

2016-01-21 Thread Dave Cole
Heidenhain also sells absolute encoders that output SSI. I've used them before. They are expensive. As I recall $800-$900 for a rotary one. If they are wired wrong they can easily be destroyed... An electrician kept changing the wiring and destroyed two of them before I could intervene. He

Re: [Emc-users] [Emc-developers] using an absolute encoder

2016-01-21 Thread andy pugh
On 21 January 2016 at 23:23, Stuart Stevenson wrote: > I think a resolver would be the way to go. Possibly not enough resolution for a rotary table. Something like the Heidenhain angle encoders might be better, they turn up on eBay occasionally. http://bicep.caltech.edu/~yuki/servo/208_736-27.pd

Re: [Emc-users] [Emc-developers] using an absolute encoder

2016-01-21 Thread Stuart Stevenson
Hi Andy, My definition of absolute encoder for this exercise is as follows: Given a rotary table of infinite rotations I want the encoder to count to 359.( depending on resolution) and the next position to be 0.000. The axis position of 90 degrees is always the same place. The sign +/- tel

Re: [Emc-users] [Emc-developers] using an absolute encoder

2016-01-21 Thread andy pugh
On 21 January 2016 at 22:45, Stuart Stevenson wrote: > Gentlemen, > I desire to use an absolute encoder. > I will work that direction if someone will point me to a good starting > point. What sort of absolute encoder? What do you want to do with it? -- atp If you can't fix it, you don't own it.