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Trouble understanding where to configure machine feed/plunge rates

12 REPLIES 12
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Message 1 of 13
dmbLPVJ8
507 Views, 12 Replies

Trouble understanding where to configure machine feed/plunge rates

Hi,

 

I'm sure this is really simple but a few hours of searching and youtube and I'm still none the wiser !

Basically I want to mill a piece on two sides, so I'm planning to use three holes to index it the stock when I flip it.

The holes are not in the actual piece, but I don't think that's a problem - I added three 3.2mm cylinders to the design and made 3mm holes through them (is that a sensible way to do this in Fusion 360 ?).

 

All looks OK in design and manufacture:

 

dmbLPVJ8_0-1618141882121.png

 

However when I try to create a new drilling operation I get three warnings and can't generate the toolpath:

 

Warning: Plunge feedrate is larger than supported for this machine.

Warning: Entry feedrate is larger than supported for this machine.

Warning: Exit feedrate is larger than supported for this machine.

Feature flags: setup-sheet-viewer

Warning: No holes to drill.

 

I assume they're saying that there's a configuration for the custom machine I'm using (my home-made one :)) where the various feed rates are lower than the ones for the tool I've selected, but I can't find these ! Also, I've set the feed rates on the tool to 1mm/min and still get the warnings, so I'm guessing these machine feed rates are probably zero.

 

I don't really understand why my milling toolpaths all seem fine though - is there something special about drilling ?

 

I've attached the f3d file in case it helps.

 

Cheers,

 

David

12 REPLIES 12
Message 2 of 13
engineguy
in reply to: dmbLPVJ8

@dmbLPVJ8 

 

You have no values in the Z axis Mc Config, see image below.

If you want to use the Mc Config facility then you must fill it in correctly otherwise it just becomes a nuicance, as you have already found.

There is actually no need to use a Mc Config unless you want all these warnings, most folks in fact don`t use one at all, it has no bearing on the G Code generated !!!

All the real work for getting the right code for your Mc is done by the Post Processor, concentrate on that if you have problems with your code.

Mc Configuration.jpg

 

You should select the hole faces for your holes as image below, updated file attached with the Mc Config deleted in Setup and it all works fine, don`t try to get too complicated 🙂

hub6-NEW.jpg

 

Message 3 of 13
dmbLPVJ8
in reply to: engineguy

Aha ! I get it 🙂 I had updated some of those values but without knowing what I was doing I'd obviously left some others out and the end result was junk ...

 

Thanks so much, it's funny how I manage to make everything so much more complicated than it needs to be 😂 The machine config is just another set of details to keep in sync so I'll steer clear of that in future as you suggest.

 

All the best,

 

David

Message 4 of 13
engineguy
in reply to: dmbLPVJ8

@dmbLPVJ8 

 

David

Yes, best not to overcomplicate things, many, many years ago when I was very young an old Engineer (My Boss) said this to me (Long before the Rock Band) !!!

 

K eep

I t

S imple

S tupid

Message 5 of 13
SolidModeling
in reply to: engineguy

Ignoring the issue isn't a solution. This has been unresolves since 2016 !!!

Message 6 of 13
seth.madore
in reply to: SolidModeling

@SolidModeling I'm sorry, what exactly are you going on about? This post isn't from 2016, so I'm not sure what exactly you're looking for 🤔


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 7 of 13
SolidModeling
in reply to: dmbLPVJ8

If you define a machine (used in setup) and in doing so then define the max feedrate and rapid feedrate in the kinetics for Z, then when you use a drill function and compile/simulate it using the machine post, you will get error -

Warning: Plunge feedrate is larger than supported for this machine.

Warning: Entry feedrate is larger than supported for this machine.

Warning: Exit feedrate is larger than supported for this machine.

 

Yes this post isn't from 2016, but the issue has been around since then. Obviously very few people use defined machines in their setups.

Message 8 of 13
glennVXP3H
in reply to: dmbLPVJ8

I have the same issue - This is more than annoying as it can mask a real problem that requires dealing with. Why is this so hard to resolve?

 

Message 9 of 13
a.laasW8M6T
in reply to: glennVXP3H

It sounds like you have you machine definition setup with incorrect numbers.

 

I have set up quite a number of Machines for simulation and have never come across this problem.

do you have the correct values for your machine here?

alaasW8M6T_0-1701996669138.png

 

Message 10 of 13
glennVXP3H
in reply to: dmbLPVJ8

Any value I put in here has no effect on drilling. It does affect milling; however, no matter what values I put in here they do not seem to be used to validate drill cycles (any of them, eg drill, bore, etc)) The solution proposed in this thread is to simply remove the machine definition. Seems to me to remove all checks and this seems a bit reckless.

 

Message 11 of 13
a.laasW8M6T
in reply to: dmbLPVJ8

So you don't actually have the same issue at all.

 

The issue in this thread is that Fusion was giving a warning that the feeds were too high

whereas you are saying it now ISN'T giving a warning that the drilling feeds are too high.

 

I can confirm it doesn't warn when the drilling feeds are too high, which I think it should do, but in reality your machine controller will give an error if you program a feed that's too high or a rpm that's too high.

I run most of our machines without a Machine config at all just fine, they aren't really necessary(But are handy) until you get to multi axis machines

 

This is something that should be looked into however.

 

Message 12 of 13
glennVXP3H
in reply to: dmbLPVJ8

I do get exactly the same error (hence how I found this thread) To be clear what I am saying is that it appears that the values in the machne config are NOT used to validate because no matter what those values are I DO get plunge rate warnings. So my question is really "where is Fusion 360 getting the values it is using to validate the plunge retract rates for drilling" Changing any of the values in both the design and the machine config always results in the warnings being generated. 

Message 13 of 13
glennVXP3H
in reply to: dmbLPVJ8

plunge AND retract rates...

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