Lead-in feed rates

[jim1108]

Is there a way to have a different lead-in feed rate similar to the way the plunge feed rate can be changed? The attached job file will show the feed-in x move (in this particular case), and then continue the move with another x value. It just seems like unnecessary code when the end result is along the same plane.

[Les Newell]

You can use path rules to change the leadin feed rate.

Which operation in that job shows the X values? The post generally only generates coordinates when it thinks they are needed. It tends to err on the side of caution so for instance after a tool change it always outputs all axes just in case an axis was moved during tool change.

[jim1108]

Ok, I forgot about the path rules option, that solved the lead-in code not having a feed rate. If you post the first tool in the job, a 1.0 cutter, you can see on the first few lines of code it has 2 x numbers, when one is sufficient. It's just kind of redundant. Example: G1 X1.25 X2.5, when X 2.5 is the final destination, and X0 is the initial starting point, X1.25 is not necessary. The program is not incorrect, it just may be a quirk with the program if you add a lead-in without defining what the lead-in does in the path rules.

[Les Newell]

I'm not seeing that here. Modal code is controlled by the post processor. What post are you using?

[jim1108]

I am using Fanuc post processor. You should see the double x moves on the first tool and others. It seems to code the lead-in separate, without a separate feed rate, unless you specify in path rules, then the finish x or y move. Specifying a 50 percent feed rate in the path rules for lead-in for instance, causes the lower feed rate to show up in the above lead-in code as it should. The moves are good and the parts come out fine. Maybe I am just reading too much into it, and as you said earlier, SheetCam errs on the cautious side.