Project Plans

Goals:

• Act as a dedicated high performance MCU(external board) for motion control on the XY axis
• Reduce the load on the main mcu, which is most likely an 8 bit board
• True closed loop: No more skipped steps
• Typical 5 stepper boards have the capability of running a 4 tool toolchanger setup
• Compatability with most existing boards by using SPI channel and one pin for chip select
• LiPo to provide higher peak current
• Accurate and precise sensorless homing
• Quieter: Stealthchop can be used without fear of skipped steps
• Less expensive than competition

TMC4361:

• Internal ramp generator, Scurve at 1/256th microstepping, closed loop correction

TMC2160:

• Connected via step/dir to 4361
• Mosfets capable of running 3a motors
• Driver is configured through the firmware(SPI)
• Possibly available by itself/separate of 4361?

Encoder options

• AS5311, AMT112, A5047D

Software goals:

• SPI motion control, DAA, and S-curve acceleration in Klipper and Marlin

Future Plans

• TMC4671 using stepstick format and mosfets on external board. Internal ramp generator would be preferred
• Custom motion controller
• TI motion controllers
• Cheap controller board with properly cooled tmc2208 or tmc5072
• High end controller board with AM437x or AM335x, motion controllers for x and y, high power 2160s on all axis
• EtherCAT / CAN