Lift Z on travel

General Discussion
1

I know Z hop is a no-go with klipper and I experienced this first hand when setting up klipper for the first time.

Some parts need a lift when crossing perimeter to the next part when printing multiple parts.

So what is the best method to add a small lift on travel in klipper?

I am running Mainsail with BTT Mini E3 V3 and Pi4b (if it matter)
Updated to latest version on everything.

Printer is working perfectly, but I want that last option and can’t find a good config for this.

No need for retraction since my flow and pressure advance is dialed in so the prints are very nice :ok_hand:

2

Why do you say that z-hop is a no-go with klipper? I’m not aware of any restrictions, and I use z-hop as a standard setting without any issues. What issues did you get when you tried it?

3

Z hop add to the height for each time it perform a z hop.

If I set z hop to 0 then everything is fine.

image
image4032×2268 1.37 MB

4

While this one is without z hop

image
image2268×4032 1.13 MB

5

Not sure what your printer is doing, but I recently printed something with z-hop (due to PLA curling on lightning infill) and it printed perfectly fine.
Are you sure your z-axis isn’t binding or something on small movements?

1 Like
6

my guess is that your z acceleration is way too much. try again with z hop and a lower z acceleration

i.e 500 or 1000 like this:

image

1 Like
7

I don’t believe that’s a klipper problem. As I said earlier, I leave z-hop turned on by default for nearly every print, and I just don’t see the problems you are getting.

Getting back to your original question, I do believe that z-hop is the right answer, and that klipper is perfectly ok with that. So that means that the problem you are having is either with your slicer setup, or with the printer itself (incuding printer config). In addition to the excellent suggestions above, I would suggest trying a test print using either Cura or Super Slicer with basic settings and see if there is any difference in your results. But from the look of those prints, it does suggest that there is some binding of the Z axis going on.

Hope that we can help you get it sorted

8
  • AFAIK there are no issue WRT Z-Hop and Klipper
  • Z-Hopping is a slicer function and not directly related to Klipper
  • klippy.log is missing
  • No information on the printer type to judge the valid input by @Hundsbuah