Tips for XY and other tuning concerns
Some of you may have already found it but I found a great site that explains in detail the settings for X and Y axis and more for our beloved Core One.
It helped me get the X and Y axes perfectly straight in relation to each other and explains everything in a very pedagogical way.
Check it out: https://arachnoid.com/3D_Printing_Prusa_Core_One/
RE: Tips for XY and other tuning concerns
The belt tuning procedure described on that page has some wild inaccuracies, and should definitely not be used.
The author seems to be under the impression that both the upper and lower belts are actually all one long belt, and should thus be tuned to the same frequency when the carriage is all the way to the right:
At the time of writing, the Prusa help page describes two frequencies, one for the lower belt loop, another for the upper loop, but because it's all one long belt, acquiring a specific frequency differential isn't plausible in field practice.
A couple corrections:
- The upper and lower belts are separate belts that are tensioned somewhat independently of each other, but even if they weren't separate belts,
- The length of the path from the carriage on the right to the pulleys on the left is different between the top and bottom belts, and thus will resonate at different frequencies when tuned to the same tension. (The bottom path is longer, thus the bottom belt should resonate at a lower frequency than the top belt)
- Equal tension of the belts is the goal of belt tuning, not equal resonance frequency.
RE:
- Equal tension of the belts is the goal of belt tuning, not equal resonance frequency.
Can't agree with this more! People keep making the mistake of unevenly tensioning the belts in order to reach the magical 98hz/92hz differential and end up skewing the gantry.
Edit: I just read the webpage listed above and the guy who wrote it doesn't understand how CoreXY printers function. Not sure why he thinks it's "one long belt"