Issue with tool orientation not Stay put

[Anonymous]

     Hey everyone.  I was wondering if anyone else has seen this recently, and know if i'm just doing something wrong.  In CAM, i usually set the tool orientation to the lower left corner.  But for some reason, when i click ok, it changes the tool oreientaion to above the beginning of the tool path.  This just started happening in the past few day.  I even opend up an older project that i'm finish with, and the same thing happend with that one as well.  The origianal starting point changed to just above the beginning of the tool path. 

     There was an update as few days ago, and from what i can remember, it started at around that point.  Is there a new setting that i have to change in order to set the tool starting/home position? I'm not doing anything differently, and i don't believe i'm doing anything wrong seeing as how it also changed in an older project that worked when i milled the part. 

[Anonymous]

Start a new file with a simple design and toolpath and verify if it happens here.

[Anonymous]

     Just tried a simple box with a pocket.  set tool orientation to one corner, clocked ok, and same thing happened.  the tool moved to just above the beginning ove the tool path.  Any suggestions?

This is what happens when i click "ok"

Ive also attached the .f3d for this file if you want to give it a shot.

[HughesTooling]

That's the way it's always worked for me, I know because it can be quite annoying when you want to see the start of the toolpath and the cutter and holder are in the way.

Mark

[HughesTooling]

Just noticed you set the tool orientation in the op, are you using 4 or 5 axis? I only have 3 axis machines so never use the orientation in an op so the way it works might have changed.

Mark

[Anonymous]

i'm useing 3 axis. 

[Anonymous]

Can you set a home position on your machine?  I ran the g-code through my machine just to see what would happen.  I homed it, and instead of moving to the beginniong of the tool path, it just went straight down to start cutting.

[HughesTooling]

This is what I get from my mach3 post, I've modified it a bit but the move to home (G28 G91 Z0.0) is standard.

(1001)
(SC)
(GENERATED BY FUSION 360 CAM 2.0.1981)
(SATURDAY, MAY 07, 2016 145328)
(T1  D=6.35 CR=0. - ZMIN=-6. - FLAT END MILL)
G90 G94 G91.1 G40 G49 G17
G21
G28 G91 Z0.                            ******************Move to home
G90
(2D POCKET1)
T1 M6
(CHANGE TO TOOL 1  D=6.35 FLAT END MILL)
S5514 M3
G54
G0 X-18.569 Y0.058
G43 Z15. H1
Z5.
G1 Z3.135 F543.
G3 X-18.59 Y0.037 Z2.943 I2.12 J-2.146
X-18.65 Y-0.026 Z2.769 I2.141 J-2.125
X-18.74 Y-0.126 Z2.629 I2.201 J-2.063

Mark

[Anonymous]

Thanks for the information my friend. But I actually just started working with CAD/cam and cnc about 2 months ago. I bought a machine and dove right in head first. So I have no clue how to read g-code yet. I'm not at that point as of this moment. So I apologize for my ignorance, but I have no idea how to understand your comment.

[HughesTooling]

What control and machine do you have and what post are you using? When you turn your machine on do you home it, the G28 Z0.0 command will take the Z to the home position. If you don't have home or limit switches this will not work.

Mark

[Anonymous]

I have an X-carve from inventables controlled by an arduino, and a g-shield. An lately I have been using there easil program to send the code to the controller. They updated it and made a post processor for fusion 360 for importing .f3d files.
Up until recently, my flow is, in F360, set home to the lower left corner, generate tool paths, then export the .f3d file to my desktop. Then, using easle, move the machine to lower left corner of my stock material, raise the bit and click carve. Only takes me about a minute to set the machine up so it hasn't bothered me.
But now, that flow no longer works. I can't get the starting location to stick to the lower left corner.
I hope this helps so we can figure out what has suddenly changed.

[HughesTooling]

What post-processor are you using, can you attach it to this thread?

Thanks Mark

[HughesTooling]

Here's a few pointers where you've gone wrong in Fusion.

First always select the body or bodies you want to machine.

Set your origin in the setup, use Select Z axis and select a face you want the Z to point away from. Then select a Stock Point for the Origin, this will be the 0,0,0 on you machine as well.

Do not select Tool Orientation in an op you do not need it for 3axis. You can see the origin from the setup highlighted.

File's attached.

Here's a back plot from your unmodified file. Note origin is at the setup origin not where you set it in the op.

Here's from the file attached.

Mark

[Anonymous]

Wow. Thank you so much guys for the help. @HughesTooling I'll check that out as soon as I get home from work in about an hour. And I'll attach the post possessor as well. I really think the problem is starting in cam though. It's never done this before. But from your last post, I might see where my mistake was made. I'll post back my results soon.

[Anonymous]

Ok.  I tried a few things. 

I set my X, Y, Z, and tool origin in the setup, as well as selecting the body. 

However, this still happens.  While it is generating the tool path, the tool is in the correct location.  But as soon as the tool path is finished being generated, the tool moves again. 

Ive also attached the post prossesor if you still wanted to take a look at that.

[Stuart-H]

Thats the normal behaviour  

you have it set up correctly ask per Marks post.

what you see when you generate the tool path is just that the tool path nothing else

what happens when you actuly run the code on the machine ( cut air, no tool in and a high Z0 )

mine always looks like that in CAM but the GUI on the control shows Y0,X0 as the start point 

Stuart

[Anonymous]

I really wish that was the case.  I ran the code through the machine as per my normal flow, but it doesn't move from the home machine anymore.  even when i simulate the cut, it acts as if the home position is at the beginning of the tool path.  This is new behavior.  It never did this before, and now i have actual product to make and sell now, so it kinda frusatrating that this had to start now. 😞

[HughesTooling]

For me nothing has changed this is a backplot from the file I uploaded above using the postprocessor you uploaded. The Fusion part and origin match the position and origin in the backplot. If I put this on a machine zeroed where the origin is shown in Fusion it would cut perfectly so I can't really help anymore as nothing is wrong with Fusion or the code. One question have you set the correct offset when you zero the machine, the code is using G54.

Mark

[Anonymous]

I'm not really quite sure about setting the offset.  Easel is a very simplifide browser based program that inventables offers to there customers.  So maybe theres something going on there.  I'm just really confused because this is how i've done it since i got the machine, and now it doesnt work anymore.  Even when i simulate the cut in F360, the tool would be at the lower left corner, and then move to the tool path, make the cut, and then return to the home position in the lower left corner. 

I thank you for your help in this matter either way though.  It was nice of you to help me with this. 

[Anonymous]

Ok I really hate being a pest, but i think i found something that can explain my issue better.

This is g-code imported to easel befor the issue atrted happening.

You can see that in the g-code, it's got home position, then moves to make the cuts, then returns home.

Now here is G-code from a different project after the issue started.

You can see that the tool never left home position.  It just goes straight down and starts cutting. 

This is the above part. I have home set to the lower left corner, but the tool is in the center above the pocket.

if i'm being too much of a pest i understand, just ignore this post and i'll stop.