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TP 2240

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TMC-2240​

  • Input Voltage: 12V-36V
  • Compatible with: Klipper/RRF firmware
  • Supported Drive Modes: TMC:SPI
  • Integrated temperature detection
  • Universal analog input with full protection and diagnostics
  • Fully integrated lossless current sensing (ICS)
  • Step/Direction interface with microstep interpolation microPlyer
  • Short-circuit protection, undervoltage lockout, chip overtemperature protection (thermal shutdown)
  • Supports stallGuard2 high-precision sensorless motor load detection
  • Integrated StallGuard2 and StallGuard4 sensorless motor load detection
  • Jitter-free combination of StealthChop and SpreadCycle, solving motor vibration issues at chopper switching speed points.
  • Higher power, lower heat generation. (Supports higher voltage, 3.0A MAX, suitable for more demanding 3D printing applications and longer operation without overheating or damage.)

TP2240 Reference Configuration​

Danger
  • The driver sense resistor is rref: 12300. Please do not set it incorrectly.
  • Choose only one between spi_bus and spi_software.

SPI Mode Reference Configuration​

[tmc2240 stepper_x]
cs_pin:
spi_bus:
# spi_software_mosi_pin:
# spi_software_miso_pin:
# spi_software_sclk_pin:
run_current: 0.65                   # Motor run current value
interpolate: False                  # Whether to enable 256 microstep interpolation (not recommended to enable)
rref: 12300
stealthchop_threshold: 0           # Silent mode threshold (set to 0 if silent mode is not needed)

Endstop-less Usage Instructions​

Infinite Position Usage Tips
  • Using infinite position requires occupying one limit port. Under normal circumstances, the first drive position uses IO1, the second drive position uses IO2, and so on.
  • When using infinite position, please note: do not connect anything to the corresponding limit port.
  • Some FLY motherboards are directly connected to the drive port. Please check whether DIAG is directly connected to the corresponding pin.
Endstop-less Usage Tips
  • To use TP2240 without endstops, connect the DIAG jumper on the mainboard.
  • The original endstop_pin: needs to be commented out or deleted, and add endstop_pin: tmc2240_stepper_x:virtual_endstop.
  • After configuring diag1_pin:, the endstop status will be refreshed as "not triggered".
  • The driver_SGT: value needs to be tested to find a suitable setting.
  • Reference Configuration
[stepper_x]
# endstop_pin:
endstop_pin: tmc2240_stepper_x:virtual_endstop
homing_retract_dist: 0        # Setting this to 0 prevents potential homing failures

[tmc2240 stepper_x]
diag1_pin: ^!
driver_SGT: 1

#   After configuration, ensure the endstop status is "not triggered".
#   This pin typically uses the "^" prefix to enable the internal pull-up.
#   Sensitivity is related to belt tension and needs to be adjusted manually.
#   (Ensure `driver_SGTHRS` is also set to an appropriate sensitivity level.)

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