Spoilboard flattening woes

I got my 30 X 30 Longmill set up and ready to go, so the first thing I wanted to do was to mill the spoilboard flat.
So I went to the Resources page, picked Longmill, then slid down to Wasteboard Surfacing and downloaded the files and picked out the Longmill Surfacing Code for my model.
But when I attempted to load it onto gSender and run the program, it wasn’t working properly. So rather than spend time with it, I elected to make my own program. Using the INTUwiz app for surfacing tables, I plunked in the exact Y and X dimensions for my spoilboard, plus the size of the flattening mill I was going to use, and ran the file via gSender.
It worked well except that it stopped approximately 11cms short of the right side on each pass. I stopped the job at that point and thought that if I increased the width by that amount it would increase its movement by that much and mill the entire width. Instead, it did exactly the same thing.
I am now wondering if gSender is overriding my width setting in order to keep the mill from going too far and crashing the gantry into the Y rails?
Help!

Marty Schlosser
Kingston, ON, Canada

@ApexWoodworks Marty: I’ve not tried either of those programs, preferring to simply create a shallow pocketing tool path in VCP. However, I have tried the gSender surfacing module with some success, so you may want to try that and report back.

One question: Do you have limit/homing switches installed?

Another question. Is your machine running into physical stops? I sometimes program things outside the physical limits of my machines and similar things happen to me.

If by running into physical stops you mean is the XZ gantry hitting up against anything, then the answer is no. And the gSender settings are correct for the X run, too.

Thanks for trying to help me out with this problem.