ok. this is only my 2nd carve on the machine and trying to use these first projects to learn what i can so doing things myself verse purchasing things. this particular issue is carving out a dustboot and having issues with the Z axis cutting to deep in the adaptive clearing path.
in the fusion 360 simulation it looks perfect, and when i get it started on the cnc it also starts out well, but it just doesn’t seem to stop at the bottom lip and keeps cutting through the entire project.
i have probed x/y/z - xy seem to be perfect, but z just doesn’t seem to be accurate. i believe i am probing z correctly and is the first bit being used so there hasn’t been any bit changes yet.
can anyone help me narrow down what i am doing wrong?
i have also took calipers to the probe and adjusted in the settings to the same dims.
The goof up on the right was my fault with depth of cut and my clamping method (tape - no bueno and lessoned learned on cutting depth passes)
but what you don’t see on the edge is that the bit took another pass and cut off 2 sides all the way to the bottom before i stopped the cut.
This is where i edited the offsets for my particular probe.
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Aiph5u
(Aiph5u (not affiliated with Onefinity))
16
Hey Joshua,
yes I see the dimensions of the probe height and width of the ridges.
Do you think we’ve eliminated the hardware and probing causes? If so, I can think of 1. your g-code program 2. Since you use an upcut bit, could it be possible that the workpiece is lifted?
No doubt its user error…just trying to figure where i went wrong. It must be code related somehow i think we have exahusted the hardware possibilities which is good. Narrows it down at least.
This is HDPE 1" thick. And although it did end up lifting off my work surface it was cutting well over 1/4in too deep prior to my holding method failing. Going to be screwing it down next time.
It is messing up with the adaptive clearing tool path and although looks great in simulation there must be something going on i am just not aware of.
Also this machine is a beast and love using it even if im on the learning curve.
Looking at your part vs the simulation it’s clear your z zero point is too low, the retracts where it travels between points are carving lines in the top of your workpiece, these should be well above the workpiece as you see in the simulation (lift Z, traverse X,Y). Did you alter any of the values on the heights tab in Fusion 360?
@WaywardWoodworker that’s what i was thinking as well… went back and checked and they looked as i would have expected, but now i am going through and specifying the bottom height of each path vs relying on the default “selected contours” maybe that will force it to stop at that height… i dont’ think that was/is the issue but worth a shot.
your assessment of the z height sounds like the correct issue… i just don’t know what i did TWICE to make it off.
zeroed at the top of workpiece
model height = workpiece height exactly
heights set in fusion 360 as shown above
zeroed shown in images above look correct…
going to run another test with 1" mdf and see what i can figure out
btw thanks to you two for helping me narrow it down. at least now its just one thing to figure out where i am screwing it up.
Aiph5u
(Aiph5u (not affiliated with Onefinity))
20
Hey Derek, hey Joshua,
as I don’t use Fusion360 I am not familiar with this simulation view, but you are right, the yellow lines that cross the circles are found as ridges in your workpiece (which cannot be intended). Sorry that I did not have a look at that earlier, I focused too mouch on probing and settings.
