Best posts made by lee7670

It would be really nice if Duet Web Control could Log the temperatures and positions with timestamps that it receives from the board to a CSV locally on the machine where Duet Web Control is running in the Browser.

The TMC4671 (https://www.trinamic.com/products/integrated-circuits/details/tmc4671/) can support steppers, Three-Phase, and DC motors/voice coils all running closed loop with Field Oriented Control for steppers and three phase motors.

Having an expansion board running one or more of these of these drivers with a power stage of 4 half bridges would allow maximum flexibility for motors/feedback.

There are dual feedback inputs so you can have one feedback mechanism for commutation and one for the actual position loop. They support both incremental ABN encoders, Hall sensors, and BISS-C/SSI encoders.

This would allow you to drive essentially any motor in step/direction mode from a duet.

Sweet tiny extruder with a micro geared dc motor for the smallest direct drive possible (https://www.pololu.com/product/3055)? You got It!

Drive a linear motor for the absolute fastest speeds for benchy printing? You can do it!

Motor torque feedback for extruder pushing force tracking and grinding prevention? Totally doable.

Want to drive a voice coil optical stage that you got on ebay just because? Easy.

Got your hands on some optical scales from a CNC and never want to use limit switches again? Sure.

That's a lot of functionality for a 12USD chip...

It would be really interesting to support Image serving in the M291 command to better allow setup procedure to be shown that aren't easily described using text.

Use cases would be things like CNC setups, cleaning procedures, bed prep procedures, warnings to clear certain areas, etc.

I( have a couple of procedures where it would be really helpful to allow operators to check visual references against an image.

This could even be a pi exclusive feature if the Duet 3 MB6HC can't handle serving image files.

See this reference from HAAS on what this could look like. Massive Cheese warning....
https://www.youtube.com/watch?time_continue=2&v=_FxHfVKSOcs&feature=emb_logo

You'll want to use the general IO headers for this.
Choose one, I usually start with IO_1.
Connect 5V_ext to V+.
Connect Ground to Ground.
Connect the Signal pin to IO_X.in

I have a similar situation where this would be very useful in general for heater outputs for multi-heater beds and extruders and other things.