@cvmichael said in TMC2660 on stepper channels 10 and 11:
"ENN - connect to ENN on the expansion bus" - what pins? I only see "En 10" and "En 11" on the CONN_LCD, but I don't see any 10, 11 on the expansion bus.
I mean the expansion bus on the 50-pin connector. You will need to tap into that bus, e.g. by clamping a 3rd IDC socket on the 50-way ribbon cable. Or you could have a couple of 50-way connectors on your expansion board, then use a short ribbon cable to connect the Duet to your expansion board and another ribbon cable to connect the DueX to your expansion board.
"CSN - connect to the corresponding ENABLE pin on CONN_LCD" - is this the "En 10" and "En 11" ?
Yes.
What is the "Stop 10" and "Stop 11" ? pins 3 & 4 on the CONN_LCD, is this for the CSN ?
No, those are for endstop switches.
"SDI, SDO, SCK - connect to SPI1_MOSI, SPI1_MISO and SPI_SCK on the expansion bus" - I already have a Duex5, and I don't see any pins for the SPI1 (I see quite a few for SPI0 though). Does this mean that I will have to sodder wires in the back of the Duet PCB to bring the SPI1 to my motor driver PCB?
See my comments on ENN above.
Since I want to make a PCB for both channels 10 & 11, I assume SPI is connected in parallel, but CSN is separate?
All the control inputs are in parallel except for CSN, STEP and DIR.
The sense resistors should be 0R05 not 0R1 VCC_IO should be +3.3V not +5V. There should be a 100uF electrolytic cap on the +24V supply close to each driver We have 1nF capacitors for each output to ground to help with EMI and immunity to inductive spikesI created a schematic, if you have some time to take a look at it, and let me know if you see any mistakes:
See the Duet schematic at https://github.com/T3P3/Duet/blob/master/Duet2/Duet2v1.04/DuetWifiv1.04a_Schematic.pdf for how we connect the TMC2660s. The resistors shown as 0R051 are 0R050 in recent production.