I don't know if anyone has figured this out so Here is an example  of a Part toolpath AND Stock size Veiw. The stock size is a wireframe of the actual stock size you are working with. The realization allows you to orbit around the part and see where you can apply clamps and such. ALso check to see IF the holes you drill will exit below the bottom of the stock.

Just a thought, (;-) TP

How do you get Mach3 to show the stock size?

I don't recall seeing a reference to this feature before.

With some Gcode mods you could even see the clamps applied in 3d to the stock to check for clearances.

Here it is shown with clamps turned on and off. And a side veiw to check the clamp heights. Easy to see IF the toolpathing interferes with the clamps.

Just a thought, (;-) TP

You can create the stock size wireframe by adding values in the softlimits config menu.  you have a MIN and max for each axis.  the point of origin for a stock size is  Xmax Ymax and Zmin. Zmin would be a NEG number -1.000 for a 1 inch thick piece of stock, assuming normal conventions IF you do it backwards on Z then use a pos number 1.000.

YOU DO NOT NEED to turn the softlimts ON for this to work. Just plug in the stock size values.

To make it simple to update Place a button on your screen then add this to it. It will then bring you straight to the screen you need to update. When done then press OK and it will update everything for you.

DoMenu(1,5)  

I was going through some OLD test notes for Mach3 . There were a LOT of gizmos I created back then as helpfull functions. Most never saw the light of day. SOme things like rigid tapping with a servo spindle using Drill canned cycles, G81,G83,G73.

(;-) TP

That's clever. I will try my hand at editing the screen set.
Thanks.

You can also do it the long way goto config then Home/softlimits you will have the same screen to update.

Just a thought, Not everyone gets the ScreenEditor (;-).

(;-) TP

Re-assigned an un-used button - works perfectly.