[BUG][IM 4.2.3] - bug with z-hop at layer change

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GonzoG
Posts: 18
Joined: Wed Nov 07, 2018 12:16 am

[BUG][IM 4.2.3] - bug with z-hop at layer change

Postby GonzoG » Sat Jul 23, 2022 3:55 pm

It think there's a but with z-hop at beginning of new layer.
It moves nozzle up, then down, and then moves to layer start point.
example:

Code: Select all

;LAYER:1
;Z:0.720
;HEIGHT:0.320
;PRINTING: 10_battery_versiontext_21700.stl
;PRINTING_ID: 0
G1 F2400 E-1.2000               ---> retraction
G1 F900 Z1.520                  ---> z-hop nozzle up
M204 S1250.00
G0 F900 Z0.720                  ---> z-hop nozzle down
G0 F7500 X147.176 Y176.343         ---> moves to layer start point
M204 S800.00
;TYPE:WALL-OUTER
;WIDTH:0.620
G1 F900 Z0.720

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Vicky@Raise3D
Posts: 8637
Joined: Fri Mar 25, 2016 3:54 am

Re: [BUG][IM 4.2.3] - bug with z-hop at layer change

Postby Vicky@Raise3D » Wed Jul 27, 2022 4:27 pm

If you dont want Z-Hop at Layer Change, you may disable Retraction at Layer Change or adjust when you want Z-Hop happens.

GonzoG
Posts: 18
Joined: Wed Nov 07, 2018 12:16 am

Re: [BUG][IM 4.2.3] - bug with z-hop at layer change

Postby GonzoG » Wed Jul 27, 2022 9:33 pm

I want it.

If forgot to write, that I think it's in wrong order and should be:
1. move up
2. move to layer start point
3. move down.

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Vicky@Raise3D
Posts: 8637
Joined: Fri Mar 25, 2016 3:54 am

Re: [BUG][IM 4.2.3] - bug with z-hop at layer change

Postby Vicky@Raise3D » Thu Jul 28, 2022 5:33 pm

Which option have you selected at Z Hop performed?
If it is selected as Only from Models to Supports, it should move up first then move to the layer start point then move down.

GonzoG
Posts: 18
Joined: Wed Nov 07, 2018 12:16 am

Re: [BUG][IM 4.2.3] - bug with z-hop at layer change

Postby GonzoG » Mon Aug 01, 2022 2:20 pm

I have step z-hop for all. But it does not matter.

The way it behaves now is a bug.
It either should be in different order, as I mentioned: up, travel, down, or not performed at all, as now it just a useless up/down moves that doesn't have any purpose.

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Vicky@Raise3D
Posts: 8637
Joined: Fri Mar 25, 2016 3:54 am

Re: [BUG][IM 4.2.3] - bug with z-hop at layer change

Postby Vicky@Raise3D » Wed Aug 03, 2022 7:43 pm

I believe we only use the logic of move up then down then travel for Z hop during a layer change. Z hop at other solid fills, it will complete the travel first then move the nozzle down as the gcodes in the picture below.
3BA75BE5-E729-45C2-8439-1E673B78948A.png


And during a layer change, the Z will move up first then move down to Layer 1 which is the next layer instead of the layer just completed printing. So moving down first then travel shouldnt affect the print result. But if you see the logic is actual affecting the print result, feel free to share us pictures and videos of the issue.


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