Drive a 1.8 degree stepper at 1 RPM

[RomanLini]

Yeah I checked the project out too. The microstepping is done by the onboard stepper driver chip James. However it only supports 8th stepping.

Also the coarse timer resolution means there is a limit to how many speeds it can run at, where the Linistepper code I posted for Ceefnas project will do 12th stepping, and uses a very high resolution Bresenham system for timing so it can do practically any speed with great precision.

And I probably should mention the linear driving of the motor current by the Linistepper means the stepper can move very smoothly (ie "stepless") at a tuned speed. An 8th step chip based driver is going to be a bit gritty for telescope use.

[hspalm]

Nice, but the source code on that page seems a bit garbled... I don't see how the microstepping can possibly work as written and there are #includes that don't have files associated, and #defines that are run together on one line.

Indeed, it's garbled! Haven't noticed, thanks for pointing out! I'm not sitting at the right computer right now, but it will be fixed soon. I'll update. (how strange is that post just above mine here, by nikki66?)