We don't support their use. I think the chips are too big and close to make it difficult or impossible to plug connectors into them when installed. We also don't recommend Users to solder onto the boards.There are RJ45 or similar footprints on the Kanalog for encoder inputs. Not sure I will use them, but curious if those are usable and tied to encoders 0-3? If so, is there a pinout detail somewhere?
But yes they are for Encoder inputs 0-3 and also each have an additional encoder input for index pulses plus 5V and Gnd.
I think so.GND and 5v terminals for the encoders... There are GND terminals near the analog I/O on JP6 & JP11, and 5V on JP8. These seem kinda far with trying to keep noise from Snapamp above from dropping in. Are these the best points to use for the encoder supply and cable shield connections?
Yes. Index pulses are handled in software so any input may be used.I will use encoder 0-3 for my 4 axis motors. For the index signals, can two different axis index inputs connect to both encoder 4 and 5 or do I have to limit one index input per encoder channel?
I'm not sure I follow that. Where are you referring to earth ground vs DC GND? I think the main issue is with DC GND. Limit switches and such should be opto isolated and not involve DC GND. My thinking is Motor shields (and noise generating signals) should have shields connected to earth GND. Encoder shields should be connected to DC GND at the Kanalog end only.This is a tough one. While testing earth ground and looking for loops, I find under 2 ohms from all parts of my 3 axis gantry router back to the quasi star point. I am still digging for hidden ground straps, but it appears the mechanics, probably ball screws and bearings, are working as a ground all the way to the the cutter. The original wiring had a ground line running from limit switches at both ends of travel for XY and Z. Plus the DC servo motor shield to earth at the drive and motor housing at other. This seems like a lot of loops. I was thinking maybe running an insulated earth ground line in my new shielded motor power cables that would terminate at the motor housing for good earth ground on each carriage and attach those cable shields to earth ground at the snapamp end only. I think that would be a quasi-star approach except the mechanics still creating loops. Any suggestions?
It seems our search only includes subject and body of posts. Here you didn't put your User name in the body so it won't be found here.Side note... when I searched in the forum for my user name to remind me where I left this thread, it does not find this here in the "Noise, Grounding" section.
HTH