Engrave toolpath not respecting Z feedrate

[flyfisher604]

New to F360 but lots of past CAD experience but very little on milling - I could easily be missing something so please set me straight.

I'm using a small CNC where Z's cutting feedrate is limited to 180 mm/sec while XY are 900 mm/sec.

The tool path for a simple Engrave rectangle doesn't seem to respect the Feed & Speeds provide.

Here are my settings - note I've set Lead-in, Lead-out, Ramp and Plunge to unique values so I can differentiate these in the toolpath (in reality they would all likely be 180 mm/sec).

Sample test file attached.

The toolpath generated moves up and down the corners of the engraving using the Cutting Feedrate which violates my machines max Z axis speeds. I had expected it to use Ramp or a Plunge feedrate. Note: I've also set my max feedrates in the Machine Configuration but these seem to be ignored - saw a not somewhere that these may only be used by the POST for error checking.

Is this the expected result? How is this normally resolved? Do people just override the maximum cutting rate in their Machine Controller software?

Thanks.

[difalkner]

My first question has to do with what you typed vs. what you meant; you typed 900mm/sec but your settings are for mm/min. So I have to ask, did you set your max feedrate in your machine configuration to mm/sec, as well? 900mm/sec would be about 2,125 ipm and that's incredibly fast for even a high powered machine let alone a small one.

Not that this is the root of the issue but I would make certain you've used the correct feedrate in your machine configuration.

David

[flyfisher604]

Sorry, initial post had the units incorrect - both are mm/min. The correct max feeds are z = 180 mm/min and xy = 900 mm/min.

The Machine Configuration Kinematics (X, Y, and Z Linear) also appear to be correctly set in mm/min with the following values:

X = Rapid (2100 mm/min) and Max (900 mm/min)

Y = Rapid (2100 mm/min) and Max (900 mm/min)

Z = Rapid (480 mm/min) and Max (180 mm/min)