Re:Mesa 7i77 differencial encoder connection.

I appreciate you all ! Thanks.

Now it becomes clear that I should use drives output as an encoder feedback.

Thanks again.

I love it when a plan comes together...

John

ishman wrote:

1 Encoder A+ input A+
6 Encoder A- input A-
2 Encoder B+ input B+
...
9 Encoder U- input U-
5 Encoder V+ input V+
10 Encoder V- input V-

ABZ are the encoder lines, 1000+ pulses per rev. Incremental quadrature + Index
UVW are the Hall sensors, 6 unique patterns per rev, low resolution but absolute position.

ABZ are used for positioning, UVW purely so the drive knows which coils need power as the motor rotates.

ABZ are the encoder lines, 1000+ pulses per rev. Incremental quadrature + Index
UVW are the Hall sensors, 6 unique patterns per rev, low resolution but absolute position.

ABZ are used for positioning, UVW purely so the drive knows which coils need power as the motor rotates.

Wonderful information. I appreciate your knowledge andypugh.

A confirmation needed that Mesa 7i77 provides 5v out as one among 8 pins for encoders while my drive don't show it's needed in it's schematic diagram. Because as I said I am connecting mesa encoder inputs with my drive as it provides encoder outputs. My drive schematic shows that it's needed to connect only 7 wires for encoders

while it shows a strange connection "ZOC" (Encoder Z signal opening output) ?

I am assuming that it doesn't require 5v as drive will provide the same. But what about ZOC ? I am confused what is this. Below is a linked schematic diagram.

filebin.ca/1UQcJ0K53d6/schematic.pdf

Yes only 7 wires are needed: A. /A, B, /B and Z, /Z (sometimes called I, /I) and ground
(the 5V is power to run a standard encoder but your encoder signals are powered
by the drive so this stays unconnected)

No idea what ZOC is and the schematic is only downloadable on windows
systems (it installs an .exe file so those working on Billys farm, beware)
pastebin.ca might be a better choice.