Input Shaper Calibration
To anyone that has actually done this procedure on a Core One: did your Z-Axis sound like it was grinding metal shards as the cal procedure moved Z down to the middle?
In my runs, the Z move noise is pretty troubling, as if whoever wrote that part of the test is only driving one Z motor; the rest of the test is nearly silent.
The results are also a bit suspicious ... factory is Ei 60 and EI 50, but the cal procedure says I should be using ZVD 52 and ZVD 52. I have pretty fair walls, zero VFAs, but corners are atrociously bad. Linear advance shows 0.05 is probably best, and profiles set it at 0.047 (shrug).
What have you guys seen for results?
Best Answer by GBMaryland:
Did you purchase and upgrade kit and build it yourself, or get the printer from Prusa fully assembled? (Starting point for my questions....)
Still trying to figure out what that has to do with my question... or why you need to ask more to answer mine. So I'll assume you haven't run the shaper cal and don't really know what I am asking.
Wow. Such a friendly sort... GFYS.
RE: Input Shaper Calibration
Did you purchase and upgrade kit and build it yourself, or get the printer from Prusa fully assembled? (Starting point for my questions....)
RE: Input Shaper Calibration
The three Z motors are driven in parallel. From one stepper driver. Can't be driven independently. In fact, if you manually turn one (or any two) the third will move as well.
Cal procedure on mine gave different IS values each time.
First X 52Hz ZVD, Y 54Hz ZVD, then X 45Hz MZV, Y 53Hz ZVD, then X 51Hz ZVD, Y 53Hz ZVD.
Don't know if it's any better than the factory defaults.
RE: Input Shaper Calibration
Did you purchase and upgrade kit and build it yourself, or get the printer from Prusa fully assembled? (Starting point for my questions....)
Still trying to figure out what that has to do with my question... or why you need to ask more to answer mine. So I'll assume you haven't run the shaper cal and don't really know what I am asking.
RE: Input Shaper Calibration
@domble -- Thank you for the response.
I have the printer on a rather stable surface and the cal returns the exact same results every time I run it: ZVD 52 for X and Y. I might try opening the door to see if that affects the results, based on your results, mine seems too repeatable.
My walls are perfectly clean, zero VFA and no ghosting that has popped out and said "fix me" ... I'm reluctant to fix something that isn't broken; but have zero experience with inherent coreXY issues so sort of hanging out on a limb to figure out my square corner problem. The accelerometer and shaper calibration might be a red herring for me.
I haven't accepted the results nor plugged them in to see if they improve the square corner issue I am hoping to solve. What doesn't make a lot of sense is the linear advance pattern is flawless and shows results very near to Prusa's default 0.047. I honestly expected that to be to issue.
The image shows open unfilled perimeter corners, and whatever that mess is where the end of that run is feathering.
Beige is the CoreOne, gray my trusty Mk3.
As an aside, and I understand what you are saying about the parallel motor control, but when you drive only one of the motors the other motors don't behave as well. It was where my mind went to explain the screeching motion the cal provokes. Normally, in all other cases, the Z axis is silent, so this is another Prusa mystery. I also take it your z-axis moves during this test sound normal? Maybe this is a hint to me there's a connection issue, like one of the motor wires isn't fully attached ... hmm.
The three Z motors are driven in parallel. From one stepper driver. Can't be driven independently. In fact, if you manually turn one (or any two) the third will move as well.
Cal procedure on mine gave different IS values each time.
First X 52Hz ZVD, Y 54Hz ZVD, then X 45Hz MZV, Y 53Hz ZVD, then X 51Hz ZVD, Y 53Hz ZVD.
Don't know if it's any better than the factory defaults.
RE: Input Shaper Calibration
Did you purchase and upgrade kit and build it yourself, or get the printer from Prusa fully assembled? (Starting point for my questions....)
Still trying to figure out what that has to do with my question... or why you need to ask more to answer mine. So I'll assume you haven't run the shaper cal and don't really know what I am asking.
Wow. Such a friendly sort... GFYS.