Project Reality Hack

[Avenall Trejo]

Toget around it you need to home the machine or change the G28 to a Z move so the first move it does is to lift the Z-axis up then does the X and Y move to the start of the cut, this problem is common as mud once you have been informed it is fine, as a practice you should move the Z-axis up your self after you have zeroed at the top of the material.

@shabbir.abdulhussein Please do not ask people to remove a safe move from there Gcode if the op has the cutter sitting on work zero for X, Y, and Z it will drag the cutter across the workpieces if he has not lifted the Z-axis up.

Looking at what you're saying here, the second part of your problem could be as @daniel_lyall is saying to do with the G28 code. I'd always jog the tool up or manually command the home position just as a sanity check for myself before running the program anyway.

Regarding the first part to your problem with it cutting -2mm into the part, i'd say this could be either where you have set the datum on the machine being different to where you have set your WCS on fusion, or, it could be incorrect tool length. So double check these before continuing. The post is posting out the correct coordinates when comparing it to the coordinates on fusion 360 simulation so it appears to be something on the machine side.

Just some additional advice which may help, but looking at the project you attached, it looks like you have 2 toolpaths for machining the top, and then the same two toolpaths but to machine the other side. These two toolpaths need to be in a separate setup though. Currently you have altered the tool orientation, which if you try to post process this, it will probably throw some errors if it's a 3 axis post processor anyway but basically you'd be trying to command the machine to re-orientate to flip the part to machine the other side. Whereas you actually need to take the part out, flip it and then re-datum the part. Not sure if that's what you were intending to do but just thought i'd let you know just in case.

It was on the machine side. I did manually remove the G28 command. The 2mm issue was actually because I had my retract height set too high for the machine so it was hitting the max height of the machine and then thinking it was in a different position. I reduced my retract height and everything seems to be working for now.

In regards to your second comment about tool orientation, I'm aware of how it's set. Before I post-process the bottom clear and bottom finish I go into the setup and invert the axes to match how I plan on flipping the piece when the time comes. Thanks for the advice! About to click go now that I've changed my toolpaths around.

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