topic Will Not Post G0 (Rapids) When Using GRBL Post-Processor in Fusion Support Forum

Will Not Post G0 (Rapids) When Using GRBL Post-Processor

dylan.edmiston03 — Tue, 03 Nov 2020 03:41:28 GMT

Hi,

Since the new Fusion 360 update whenever I post using GRBL post processor the rapids are not being posted. The feedrate is staying the same as my cutting feedrate. I have tried using High Feedrate Mode to rectify the issue and this has not done anything. I did not have this problem before one of the more recent updates. I am trying to preform a large toolpath and the absence of rapids is moving my machine time from 3 to 7 hours which is killing me as I have to machine 8 of these operations.

One weird thing that is occurring is the machine will rapid to the start of the toolpath and to g53 at the end, but no rapids in-between??

Please help.

-Dylan

Re: Will Not Post G0 (Rapids) When Using GRBL Post-Processor

Arun.rs — Tue, 03 Nov 2020 07:06:54 GMT

Hi @dylan.edmiston03

Thanks for raising your concern via Forum.

I could not replicate the same behaviour at my end. I have attached the post processed NC output.

(1001)
(4th cut)
(T1 D=50 CR=0 - ZMIN=-1 - face mill)
(T2 D=6 CR=0 - ZMIN=-11 - flat end mill)
G90 G94
G17
G21
G28 G91 Z0
G90

(2D-Face)
T1
(myToolComment)
S5000 M3
G54
M8
G0 X80 Y-24.375
Z15
Z5
G1 Z-1 F1000
X-80
G2 X-80 Y0.95 I0 J12.663
G1 X80
G0 Z15
M5
G28 G91 Z0
G90

(2D-Contour)
M9
T2
(CHANGE TO T2)
S5000 M3
G54
M8
G0 X-9.725 Y29.1
Z15
Z5
G1 Z1 F500
Z-11
Y29 F1000
G3 X-5.725 Y25 I4 J0
G1 X39
G2 X50 Y14 I0 J-11
G1 Y-22
G2 X47 Y-25 I-3 J0
G1 X-42
G2 X-50 Y-17 I0 J8
G1 Y22
G2 X-47 Y25 I3 J0
G1 X-5.725
G3 X-1.725 Y29 I0 J4
G1 Y29.1
G0 Z15
M9
G28 G91 Z0
G90
G53 G0 X0 Y0
M5
M30

Could you please send me the F360 project and post processor please? so that I can have a look.

Regards

Re: Will Not Post G0 (Rapids) When Using GRBL Post-Processor

Stuart-H — Tue, 03 Nov 2020 08:08:27 GMT

do you have a personal licence if you have it’s the new normal behaviour

Re: Will Not Post G0 (Rapids) When Using GRBL Post-Processor

seth.madore — Tue, 03 Nov 2020 09:40:50 GMT

What @Stuart-H says is correct. If you are on a Personal Entitlement, there have been a number of changes to this license. You can read about the details here: https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/sfdcarticles/sfdcarticles/Fusion-360-Free-License-Changes.html

and here: https://www.autodesk.com/campaigns/fusion-360-personal-use-changes

Re: Will Not Post G0 (Rapids) When Using GRBL Post-Processor

dylan.edmiston03 — Tue, 03 Nov 2020 15:02:13 GMT

Wow. What a ridiculous thing to remove from personal use. Obviously the rationale behind this decision is wrong. Lighter machines make smaller cuts (optimal load) so there is denser tool paths and more rapid moves during adaptive strategies. Also federates are lower on lighter machines. Meaning that having rapids is more important on lighter machines then industrial ones. Obviously I am an example of this since I am running this cam on a $3k cnc router. The poorest mans cnc. Feels a lot like autodesk is pressing people for subscriptions on software that it offered people for free and that they learned and loved.