TMC2130 Silent Step Stick RAMPS Adapter PCB

thingiverse

To connect SPI lines for TMC2130 stepper drivers on a RAMPS board, I designed a custom PCB that allows direct connection of all SPI lines point to point instead of requiring a single point to connect to multiple points on the stepper drivers. This setup also allows using a REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER LCD screen sharing the same SPI interface of the microcontroller (arduino). Since PCBs can be ordered for about 5 euros including shipping from China nowadays, I prefer this option to creating the wiring manually. To order a PCB, simply use the attached ZIP file at JLCPCB or similar services. The required settings for Marlin are as follows: // The following define selects which electronics board you have. // Please choose the name from boards.h that matches your setup #ifndef MOTHERBOARD #define MOTHERBOARD BOARD_RAMPS_14_EFB #define X_CS_PIN 64 #define Y_CS_PIN 63 #define Z_CS_PIN 40 #define E0_CS_PIN 42 #define E1_CS_PIN 44 #endif Make sure that setting TMC_USE_SW_SPI in Configuration_adv.h is not active (inactive by default). The purpose of the board is to use the hardware SPI interface for the TMC as well. Note that I am using two Z stepper motors on my Hypercube EVO, so I use E1 as Z1. A resistor divider for an inductive probe is also included, converting a 12V signal to a 5V signal. DIPtrace schematics and layout files are attached (DIPtrace is free for up to 300 pins per board). Note that the mounting hole location on this PCB matches the mounting holes on the Arduino and RAMPS boards precisely, eliminating the need to force screws through non-aligned mounting holes with cheap adapters. Of course, you will need to mount the connectors to the PCB itself; but since it is only through-hole stuff, it should be a nice and simple soldering practice. IMPORTANT: I only added the Eagle schematic file because Thingiverse would not let me publish this thing without a known file type attached. I just exported this file type from DIPtrace and never used it, so use it with caution please.