Basic Information: Printer Model: Sapphire Pro MCU / Printerboard: BTT Manta M4P with BTT TMC2240 Driver Modules Host / SBC: rPi CM4 klippy.log (127.6 KB) I’ve been wanting to try out the TMC2240 and I finally have a few cycles to do so. I’ve loaded four of them up on a Manta M4P and starte…

Okay, I made some progress here. I moved the stepper to the “Y” driver and everything worked without the issue reported previously. NOTE: “X” and “Y” are how the drivers are referenced in the User Manual, schematics and pinout drawing, so I’m following that convention here even though when you loo…

This is the only exception in the Klipper code, they are defined as “temperature_monitors” So, they are only active if motors are enabled. This is done that way because it is possible that the user can disable the power of the stepper driver with motor disable, and so the SPI read would fail. Hop…

Okay, thanx that’s really helpful - so, with what I’ve done above, I couldn’t be sure if I was actually communicating with the TMC2240. Moving forward but not quite where I want to be yet. I can enable the stepper and the temperature starts displaying (about 20C higher than I would expect and 10C …

[image] nefelim4ag: Btw, because of how they are used inside the code, they do use SG2 (like TMC5160), instead of SG4 (like TMC2209). Also, they do support jerkless switch of stealth to spread and vise versa. I thought the TMC2240 supports StallGuard2 and StallGuard4 Sensorless Motor Load De…

[image] mykepredko: PC0 ^!PC0 I would guess it should be similar to the TMC2130/5160. (And maybe diag1, depends on which pin is connected to the endstop). [image] hcet14: I thought the TMC2240 supports StallGuard2 and StallGuard4 Yes, this is what I meant, but Klipper only uses SG2 …

[image] nefelim4ag: [image] mykepredko: PC0 ^!PC0 Well, that did something when I try to enable the motor (using MANUAL_STEPPER ENABLE=1 STEPPER=stepper_0): [image] klippy (1).log (632.3 KB) Also tried it with SGT set to 0 as that’s the intermediate value with the same result. It …

[image] hcet14: I could remember this Sensorless Homing with the TMC 2240 drivers - #46 by DrumClock thread. You also were pretty involved. Yeah, I referenced that when I was first trying things - that’s why I started with diag0_pin set to 0 as that’s what @DrumClock used for his SGT value.

Validating TMC2240 operation on Manta M4P

General Discussion

hcet14 November 12, 2025, 10:40am 5

I could remember this Sensorless Homing with the TMC 2240 drivers - #46 by DrumClock thread. You also were pretty involved.

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Validating TMC2240 operation on Manta M4P

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