I’m building a Lowrider 3 for cutting cardboard and I’d like to explore using a tangential cutter driven by a 6th stepper motor. I’ve seen this great thread on the gcode [image] Tangential cutter in development Hardware Development Some people may have seen where a few of…

[image] MalaBlanca: It looks like the FluidNC config already has a ‘c’ axis defined which is a starting point. Is that correct? Yes, FluidNC supports defining a C axis. I’ve installed a TMC2209 in a jackpot and twiddled a config.yaml to use it. The jackpot seemed fine with the 6th TMC. You…

I believe the stepper driver ports are named x, y, z, a, b, c, but the axis from the gcode is “A” like normal. The “c” refers to how it’s wired and the physical position, and not the name of the axis. I think I messed with it a little and it worked out of the box, but it has been a minute.

Looke like I had it backwards, and it is “C”. [image] Custom Bart Dring FluidNC controller Updates and News Great suggestion Barry! [20230723_235226] [20230723_235300] CLASSY! Here’s the MPCNC at the moment: [16901746934835170106828521998412] The 4th axis moves b…

[image] Jamie: But at the time I was sure it could be called axis A in the config. I didn’t play with this part as I only have a bench test setup with steppers and endstops. I don’t actually have a 4+ axis machine to play with.

So may i ask how you will do the gcode??

Weirdly the gcode is the easy bit for this. I’m making a scalable shipping box so it’s all straight lines and no curves. I can quickly build a csv of (x,y) dimensions to start and stop each cut. I’ve written a python script to work with my current drag knife which then looks at each cut, figures …

[image] MalaBlanca: I figure that the hardware side of the tangential knife looks pretty easy, and the gcode is easy for me to generate. I just don’t have much experience with the electronics element and no experience with FluidNC Well than the community can help you. We have plenty of exper…

Thanks Jim Am i right that all I need is “any old” TMC2209 driver, a generic 4-wire stepper, and a cable?

[image] MalaBlanca: Am i right that all I need is “any old” TMC2209 driver, I’ve only tested with BTT family TMC2209 v1.2 drivers, and those will work. There are 2209 stepsticks in the wild that have funky UART configs and if you had the misfortune of buying one of those you may need to play…

Rather than a stepper could I use a servo? This would negate the need for homing. It looks like FluidNc supports servos. I’ve got a couple of MG 996R continuous servos and if I’m understanding correctly since these are 4.8-6 volt I’d connect one directly to a GPIO pin rather than the motor driver…

Adding a 6th stepper to Jackpot

Software / Firmware Jackpot Board / FluidNC

jamiek (Jamie) July 18, 2024, 9:25pm 4

Looke like I had it backwards, and it is “C”.

But at the time I was sure it could be called axis A in the config.