topic Re: Issue between feedrate and finishing feedrate in Fusion Manufacture Forum

Issue between feedrate and finishing feedrate

Anonymous — Mon, 07 Sep 2020 13:36:10 GMT

Hello,

When machining a 2D contour, I noticed that the feed rate was 3000mm/min while the tool used is set to feed at 5000mm/min.

The g-code is as follows:

The feedrated is correct at 5000mm/min but it goes immediately afterwards to 3000mm/min.

It seems to me that it is actually the finishing feedrate that takes priority over the tool feedrate.

Is this normal?

When finishing feedrate is set to same feedrate as the tool, I do not have this issue.

Re: Issue between feedrate and finishing feedrate

fr33l0ad3r — Mon, 07 Sep 2020 14:13:55 GMT

Default single pass "contour" counts as finishing pass – so that's normal.

You can look inside of toolpath raw data that will be posted: right click and click "Show toolpath"

Re: Issue between feedrate and finishing feedrate

Anonymous — Mon, 07 Sep 2020 14:30:27 GMT

Thanks for answer.

My machining was to slow and it burnt the tool, i don't want to make same mistake again.

Is there a way to disable finish toolpath or go through finish feedrate ?

Re: Issue between feedrate and finishing feedrate

fr33l0ad3r — Mon, 07 Sep 2020 14:51:41 GMT

Just tried to make new part and added 1 end mill from my own lib and 1 from fusion examples. Both are going full speed on horizontal moves so I have no clue how you went with 3000 feedrate - maybe you can check it with newly created operation

Re: Issue between feedrate and finishing feedrate

Anonymous — Mon, 07 Sep 2020 15:12:44 GMT

I already check everything before my post, this is why I came here, I don't know why I get this.

I make another contour and I get the same result.

When machining "contour" Feedrate depending on Finish feedrate.

Re: Issue between feedrate and finishing feedrate

fr33l0ad3r — Mon, 07 Sep 2020 15:32:25 GMT

I am unable to reproduce this behavior unless by adding lower value manually

Re: Issue between feedrate and finishing feedrate

Anonymous — Mon, 07 Sep 2020 15:36:08 GMT

What happened when you set contour with a tool with feedrate faster than the finish feedrate ?

Re: Issue between feedrate and finishing feedrate

fr33l0ad3r — Mon, 07 Sep 2020 15:55:17 GMT

I get result same with yours but I added numbers manually as I said

Re: Issue between feedrate and finishing feedrate

Anonymous — Mon, 07 Sep 2020 16:07:28 GMT

Ok.

So we have to change finish feedrate manually if lower than "tool" feedrate?

Is this behaviour works like that from a recent update or from long time ago ?

Re: Issue between feedrate and finishing feedrate

fr33l0ad3r — Mon, 07 Sep 2020 16:18:18 GMT

2017 post

https://forums.autodesk.com/t5/fusion-360-manufacture/feedrate-help-understanding-needed/td-p/6998305

Also:
https://forums.autodesk.com/t5/fusion-360-manufacture/2d-countour-feed-rates-help/td-p/7279091

Re: Issue between feedrate and finishing feedrate

Anonymous — Tue, 08 Sep 2020 09:12:05 GMT

Thanks a lot,

cj.abraham says:

The finishing passes (a single pass in considered a finishing pass) are controlled by the finishing feedrate, which by default is set to be equal to the cutting feedrate and should update automatically. If it is not automatically updating, right click on the "finishing feedrate" text box and select "reset to built-in default."

I understand the way it work but that keep a bit tricky for me.

I need to updating with the right click, each time, if I forgot to do it (which can happen ;)), I will broke another tool.

It would be easier and less risky if the finish feedrate will automatically updating to the cut feedrate, as it should, according to cj.abraham.