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Extensions

The Ultralight N17 was designed to accept additional, directly connected PCBs or flexible cables that can connect into the 20 pin HC-PBB40C-20DP-0.4V-02 connector on the back of the board.

This connector exposes PVIN at ~1.3A Max, +12v, +5v and +3.3v each at 0.3A Max, 4 x GPIO directly connected to the RP2350 (UNPROTECTED) and 3 x encoder pins directly connected to the TMC2240 (UNPROTECTED).

Undercarriage - Closed Loop

Status: Work in Progress - boards exist, encoders need soldering and then testing with PIO-based SPI.

The Closed Loop Undercarriage is an extension board for the Ultralight N17 which attaches a magnetic encoder (AS5047P or D) to the 4 x GPIO pins on the RP2350, and 3 x encoder pins on the TMC2240.

With further software work on the RRF side, this means the Ultralight N17 will be able to run in closed-loop mode, using direct phase stepping just like the Duet3D M23CLs!

My target for this is a rough price of £15-20, which will allow upgrading existing open-loop-only Ultralight N17s to closed loop mode.

Undercarriage - IO

Status: Idea stage.

The IO Undercarriage will be an extension board that adds further inputs and outputs to the Ultralight N17, connecting them to the 4 x GPIO pins exposed via the expansion connector on the RP2350.

This could expose a mix of endstop style inputs, thermistor inputs or similar, and PWM outputs.

Ideas

If you have any ideas for new extensions or are interested in the extensions above then please do get in touch via email - undercarriage@mnb.ltd.