Microstepping settings:
I have them set to 1/32 (and have it tuned out to support it well), if I go up to 1/16 or 1/8, what affect does it have on print quality? I notice some moire in my prints and am wondering if that’s the delta interaction and if it’s tuneable.
Our printer is H-Bot and uses 1/32. To be honest I doesn’t made comparative test regarding print quality. For sure with more micro stepping the noise and think vibration is reduced as the driving signal is more “smoothed”.
Higher microstepping ratios make the movement smother and quieter, but should not be relied upon to increase precision. Of course, if you set it too high, you will run into step rate limit issues. How high is “too high” depends on the specifics of the mechanics of your machine as well as the settings you’re using to print (if you’re printing super-slow, your step rates will be lower). I’ve developed some rules of thumb for choosing these settings on a cartesian machine, but they don’t translate to a delta.
Apparently the moire is related to your delta segments per second setting. I haven’t been able to test what I’ve been told, but I believe it also heavily loads the machine. So, I’d adjust and see if those settings change anything.
@Shauki I will, once I’ve collected enough parts to do so! In the meantime, it fills the hours.
A big issue that comes up with m micro stepping is the higher the micro stepping the less torque available. This leads to lower acceleration rates and more frequent step loss. The step loss can be harder to track to as it can happen. In small increments during accel/deceleration
@Joe_Spanier That’s a myth. The torque of pulling to the microstep position from the nearest full (or half) step may be less, but you have the same torque at full-step, and it takes the same amount of force to cause a skip.
@Shauki in that instance you would have more torque at 1/4 step
@Whosa_whatsis Ive experienced what I described directly in CNC mill and router builds with 400 oz/in motors. At 1/16th step the axis would move but not reliably. At 1/4 step I can run at 300 IPM reliably with no issues. At 1/2 step I cant physically stop the axis.
Maybe with such low torque motors we dont see much of a difference in the motors we use for 3D printing?
Hmph, might be worth flipping the printer upside down and going to 1/16th…
@Joe_Spanier What kind of driver were you using? I suppose that an old unipolar, non-current-regulating driver might do that, but with modern constant-current stepper drivers, the physics just don’t make sense.
You’re right though that it’s less of a concern for printers than it is for mills, because we are typically driving purely inertial loads.
The Drivers that i really saw it on were the probo-step drivers from http://www.probotix.com and were uni-polar.
Ive gone to Bi-polar drivers wired in bi-polar parallel since, but I left my micro-stepping at the same 1/4 step rate. Maybe I should try dropping them to 1/16 and see what happens.
That was it, @ThantiK ! I dropped from 100 to 60 and printing is MUCH smoother, effector movements much more rapid, and the output looks a lot better!
@Mike_Miller dropped what “from 100 to 60”? 
- delta segments per second?
Yup! Video is post processing now, I’ll upload it shortly. (So nice to have something that isn’t a failed print question.)