Steve Thanks again for very motivating post :-)
Made some experiments with cables connectors Mitsu MR J2 10A and Mr J2S 40A + Galil DMC-2260 ( galil is pain looks like I got some OEM but manage to install 1.0q firmware on the end ;-) This one is 12 MhZ differential encoder input controller it is not a lot consider modern 17bit Mitsu encoders !
I decide to make my very own cables reason one been- reliability with every connector every screw on the 100 pin cables is simply reduce the odds consider high vibration environment doesn't look good, financially ether ( cost of Cables and two ICM2900!) . Second - the Mitsu amps have very standard A B Z differential encoder outputs so need no ground no encoder power, amp enable and logic ground - total 10 wires. Plus analog command screen single core an this is it if we talking connections in between Galil and Mitsu I certanly manage this much.
One question I have for Galil Gurus. In torque mode Mitsu maxing out on torque @ +- 8V were Galil output +-10 is not creating much of problem but reducing dynamic range of controller - is it possible to adjust this 10V in Galil and witch commands to burn?
Right testing - using standard 1.25mm pitch flat ribbon No shielded ( screen ) .
Mitsu Mr-j2 have no issues @3000rpm 8192 pulses per revolution with flat ribbon cable 2Meters long ( newer need this longer than 1/2Meter) spread on the floor pulse train just under 409600Hz, in differential seems to work with no hiccups pulse train on Galil end looks nice and clean ( digital oscilloscope used)
Mitsu Mrj2s 131072 puces per revolution encoder @3000 rpm ( now I know why Mitsu have electronic gearing on digital input :-) 6,553,600 Hz frequency and still looks clean !! Lets add some power cables from the motor to the mix ( sorry motor ain't loaded - not much current through cables) ok + 1kW builders halogen cable ON/Off/On... and all working!
Conclusion I'm not spending money on Two ICM-2900 breakout things :-) and screened 100Way cables :-))
When finished and tested properly I'll publish schematics or offer ready made Direct Cables MItsu-Galil brand :-)