Unexpected Results - Wasteboard

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21 May 2021 01:50 #209719 by PastorHealer
I'm not sure this is the right place for what I'm experiencing. But I've been trying to get a new wasteboard hole pattern done and the results are a mess.

Using Fusion, I'm using the EMC post for Linuxcnc.

I have zeroed out the dimensions and heights in the tool file

One of the problems I'm having is when the tool bores out a hole, it drags out of the hole on it's way to the next hole. Yet, I've got a 5mm height for rapids.

The other issue is each row is fairly accurate in distance between holes. But when the tool moves to the next row, the row is skewed as it moves across the board.

All along I've been thinking I have a machine problem/.ini settings etc. I began to wonder if the header in the gcode post is not right for linuxcnc.

Here is the top part of the latest post I was trying to run...

%
(SPOILBOARD HOLES)
N10 G90 G94 G17 G91.1
N15 G21
(WHEN USING FUSION 360 FOR PERSONAL USE, THE FEEDRATE OF)
(RAPID MOVES IS REDUCED TO MATCH THE FEEDRATE OF CUTTING)
(MOVES, WHICH CAN INCREASE MACHINING TIME. UNRESTRICTED RAPID)
(MOVES ARE AVAILABLE WITH A FUSION 360 SUBSCRIPTION.)
(BORE1)
N20 T4 M6
N25 S12000 M3
N30 G54
N35 G0 X38.118 Y38.4
N40 G43 Z15. H4
N45 G1 Z-1.635 F500.
N50 Z-3. F508.
N55 X37.8
N60 G3 X37.5 Y38.1 I0. J-0.3
N65 X38.7 Z-3.5 I0.6 J0. F500.
N70 X37.5 Z-4. I-0.6 J0.
N75 X38.7 Z-4.5 I0.6 J0.
N80 X37.5 Z-5. I-0.6 J0.
N85 X38.7 Z-5.5 I0.6 J0.
N90 X37.5 Z-6. I-0.6 J0.
N95 X38.7 Z-6.5 I0.6 J0.
N100 X37.5 Z-7. I-0.6 J0.
N105 X38.7 Z-7.5 I0.6 J0.
N110 X37.5 Z-8. I-0.6 J0.
N115 X38.7 Z-8.5 I0.6 J0.
N120 X37.5 Z-9. I-0.6 J0.
N125 X38.7 Z-9.5 I0.6 J0.
N130 X37.5 Z-10. I-0.6 J0.
N135 X38.7 Z-10.5 I0.6 J0.
N140 X37.5 Z-11. I-0.6 J0.
N145 X38.7 Z-11.5 I0.6 J0.

What I don't understand is in the Fusion post pull down, I turned off tool change and anything else to do with tools.

I apparently don't understand what Linuxcnc needs to run a job properly. If someone could explain this, I would be grateful

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21 May 2021 01:56 #209720 by BigJohnT
If you don't set the path blending in your preamble (which I don't see one) then LinuxCNC goes as fast as possible without regard to path.
linuxcnc.org/docs/2.8/html/gcode/g-code.html#gcode:g64

gnipsel.com/linuxcnc/g-code/gen01.html

JT

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21 May 2021 03:29 #209723 by PastorHealer
I finally feel like I'm getting somewhere! Wow! John, I'm wondering if you would like to come here for vacation, like now!

My wife and I just read this reply to my question and are so encouraged. We had a feeling there was something wrong with the gcode.

Does this mean everytime I create a Fusion Post, I need to go in and add these codes? Can I do this somewhere in one of the files? .ini maybe?

And lastly, would this lack of preamble possibly cause the issues we are having?

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21 May 2021 04:17 #209728 by PastorHealer
OMG!!!

Hours and hours and hours of searching the .ini, .hal files

OMG it's working!!!

John
Thank you so much!

You've taken a nightmare of a project to completion

So grateful

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21 May 2021 19:47 #209790 by andypugh

Does this mean everytime I create a Fusion Post, I need to go in and add these codes? Can I do this somewhere in one of the files? .ini maybe?


You can put it in the INI as a STARTUP_GCODE but it would be better to add it to the Fusion Config.

There is a version of the Fusuion postprocessor here which inserts G64:
forum.linuxcnc.org/fusion-360/36097-fusi...ing-post-with-g64-pn
The following user(s) said Thank You: BigJohnT

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21 May 2021 21:05 #209803 by PastorHealer
I will give this post a try. Thank you Andy

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