Oh man, this morning i broke 2 expensive endmills. But here the Story, i used Fusion360 and also the Postprocessor for tinyg ( http://cam.autodesk.com/posts/?p=tinyg ) to generate the catchframe gcode.
Every time, the machine start to crash in my material to position Z-3(!) with fast feedrate (F600) and will move to close the center of the object. This is to much for my endmill and broke
Here the first lines of generate gcode from fusion360 with tinyg postprocessor:
(2D CONTOUR2)
M5
M9
T2
M3 S8000
G54
M9
(here move bevor to Z-3)
G0 X9.503 Y9.704 <— move to the startpoint
Z7.
Z5.
G1 Z2. F600.
Z-0.85 F30.
X9.497 Y9.701 Z-0.896
Maybe somebody know what is happend here, also i don’t understand the crazy Z-Moves (Z7. Z5. …) but know i have some problems to trust Fusion360/ting combination.
And why (to hell) is the content of tinyg postprocessor so complicated!!
Ok, may i found the problem. I have a homing switch on the top of the z-axis. After homing the Machine coordinates display Z=-3.000. I don’t know why, but i think i have to read more about the WCS System I reset the zero point of G53 and now it works fine.
I know what you feel @Frank_Herrmann , I broke plenty of expensive bits when testing TinyG2 autoleveling a while ago
This is the best way to get experience anyway, isn’t it?
I was finding a similar problem where I could not get fusion 360 to go to a safe a height so I kept manually putting it on the gcode file. What I think is the problem is I don’t use wcs correctly with setting my g53 z0 to the safe height and use g54 to set the work piece top.
I agree i also broke a couple of end mills. It was because fusion expected Z0 to be a safe height and not work height. This was a real pain when you used the touch plate as it would set the machine z0 as top of the work.
I ended up changing “use G53” to No in the property box for the post processor. This seems to have stopped it. (I was hoping that the new super touch plate widget will no longer cause this to happen) as soon as i finish my mill rebuild i will test
@Davey_Rance , @sszafran , @jlauer … many thanks for the comments, ok first i learned, dont use G53 Option in tinyg Postprocessor Make an air-cut-test first. Ok, i will give a try cuz Fusion360 is so great and i#ll use it.
