Is Hillbilly right?
Should I connect the c and c- from the encoder simulation to the index + and index - terminals on the ICM2900??
Please be patient with me. I will learn encoders but right now I have my hands full working out wiring mistakes and other bugs.
Also, what I found very interesting is that when I look at the block processing diagram in the servo manufactures drawing, it looks like it shows all the negative (Low) terminals on the resolver are hooked to gnd anyhow. They are all marked "0 Volts" on the drawing. SinHigh, SinLow, CosHigh, CosLow, ExciteHigh, ExciteLow. <<<as marked on the resolver terminals...
I guess that would make sense if the resolver is really nothing more than a spinning transformer. (but what do I know).
From reading both of your replies, am I to understand that I don't even need to hook up the index wires? (remember my tolerance is + or - 1/4 inch or more!)
As I understand Hillbilly's post, the marker pulse or index pulse is only there because a mechanical limitswith will trip at different points varying a few thousands here and there? (I understand those fine accuracies are required for most cnc applications)
So a normal homing routine would direct the machine to the home switch. When the machine hit the home switch it would slow down greatly and then look for the next marker or index within the following motor shaft rotation?
So in most applications, the home switch is nothing more than an approximate location and the shaft orientation will determine the actual physical position of home?
I must have this correct because it sounds logical. Yes?
Thanks for the help..
Murph |