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Version: 2.0.x

Fysetc Spider v1.1


Fysetc Spider V1.1 Wiring Diagram

If you use the Ratrig endstop switches and cables, do not blindly plug them in to your Spider as doing this will short the board's 3.3V power rail.

You will probably have to swap the outer two wires (red and white) on the board end of the cable but double check to make sure.


If you have been testing your Spider without the stepper drivers plugged in, there is a chance that you'll blow the 3.3V voltage regulator on the board if you do not discharge the capacitors before connecting the drivers. The lesson here is don't power up the Spider without the stepper drivers plugged in. Please read


Before connecting a probe check the probe voltage selector jumper.

Fysetc Spider V1.1 Probe Voltage Selector

Connection to your Pi

While the Spider can connect to your Pi via it's UART this is not supported by RatOS as standard and will require manual firmware configuration.

The normal RatOS connection is via USB as this allows new versions of Klipper to be uploaded without needing an SDCard. You can, of course, power the Pi from your Spider whichever form of connection you use or if you use a dedicated Pi Power Supply you can shut down your Spider while leaving the Pi running.

Firmware installation

Follow the steps in the RatOS Configurator at http://RatOS.local/configure?step=1.


If you're going through initial setup please continue in the installation guide

ADXL345 Connection

In your printer.cfg uncomment the following:

#   For ADXL345
accel_chip: adxl345
# Change the following to the centre of your bed.
probe_points: 200,200,20

Connect the ADXL345 to the Spider like so:

Spider         ADXL345

Fysetc Spider V1.1 ADXL Wiring

See the Fysetc wiring plan for details:


You might have to disconnect the ADSL345 from your Spider while you are uploading firmware using the SD Card.

Undervoltage errors

If you are using the Fysetc TMC2209 step-sticks and you're getting Undervoltage errors from the stepper drivers make sure to either fully disable or enable stealthchop.

To completely disable stealthchop add this to the "### USER OVERRIDES" section of printer.cfg for each driver on your printer:

    [tmc2209 stepper_x]
stealthchop_threshold: 0

You can also enable stealthchop instead, like so:

    [tmc2209 stepper_x]
stealthchop_threshold: 9999999

Klipper recommends using either stealthchop or spreadcycle for TMC drivers: