Toolpath too low. Why ?

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supik007
Posts: 2
Joined: Mon Nov 29, 2021 4:39 pm

Toolpath too low. Why ?

Post by supik007 »

Hello all!
I'm trying to create PATH and export to GRBL file for hobby 3018. All is OK, but generated path (begin lines of path) is too low. I don't know what I'm doing wrong...
create simple object
create Job
create Faces
and create Contour
Then create Post Procesing. and see in code : (preview )

Code: Select all

(begin operation: Profile_Faces)
(Path: Profile_Faces)
(Profile_Faces)
(Compensated Tool Path. Diameter: 0.8)
G0 Z5.0000
G0
G0 Z0.0000
G1 X72.0060 Y1.9229 Z-0.8000 F60.00
G2 X72.0986 Y2.0590 Z-0.8000 I0.1408 J0.0038 F60.00
At the third line from end you see tool is lowering at 0 - here is material.. But then tool goes to "window" - and lowers at -0.8mm.
Right is move to window position and then lower at -0.8.
Where is my mistake ?
Thanks.
as attachment is my test file ....
Attachments
displej.FCStd
(26.96 KiB) Downloaded 18 times
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sliptonic
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Joined: Tue Oct 25, 2011 10:46 pm
Location: Columbia, Missouri
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Re: Toolpath too low. Why ?

Post by sliptonic »

Please read the post about asking good questions. Then update your post with your FreeCAD info.

I took a quick look at your file and it looks like it might be created with an old version of FreeCAD. I tried a new profile and it generated correctly.
spanner888
Posts: 326
Joined: Tue May 28, 2019 10:51 am

Re: Toolpath too low. Why ?

Post by spanner888 »

I opened your file, but had a number of errors, which I suspect may be due to using a different FreeCAD version. One error I see is that the Path job has no model.

We need to know your FreeCAD info as described at point 4 in this forum info.

Then people helping can try your FreeCAD version and avoid any version differences.

EDIT: @sliptonic posted while i was typing ...
chrisb
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Posts: 53945
Joined: Tue Mar 17, 2015 9:14 am

Re: Toolpath too low. Why ?

Post by chrisb »

The file was made with 0.18.
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supik007
Posts: 2
Joined: Mon Nov 29, 2021 4:39 pm

Re: Toolpath too low. Why ?

Post by supik007 »

Yes, I use openSuse, and new 0.19 version of FreeCAd is unavailiabe yet.
OS: openSUSE Leap 15.2
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.Unknown
Build type: Release
Python version: 3.6.10
Qt version: 5.12.7
Coin version: 3.1.3
OCC version: 7.3.0
Locale: Czech/Czech Republic (cs_CZ)

I again watch video with example how to use job tool. Delete old job and create new, as I see in video. Surprisingly path is right now ... but I change my tool to endmil. I don't know what I was wrong,
Many times I tried it, so maybe I was deleted model, as said spanner, do not know...
Now path looks ok :

Code: Select all

(Contour)
(Compensated Tool Path. Diameter: 0.8)
G0 Z5.0000
G0 X142.6893 Y56.9685
G0 Z3.0000
G1 X142.6893 Y56.9685 Z-0.8000 F60.00
G2 X142.8064 Y56.6857 Z-0.8000 I-0.2828 J-0.2828 F60.00
Thank you for your effort, the problem seems to be solved.
M.
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