Alrighty,
Here is what to do; there are a few steps to take to get this working.
1. Add a Flute Count field to the Tool Offsets Table.
Go to View, tool table. Then Edit, Table Fields. Then under the user fields tab; add a field called Flute Count and set it to integer.
2. Add a DRO to the screen wherever you want to see the Chip Load. I have it set up to justify left so you can see it better and have it reading to 4 decimals. Notice the "Format" under the properties. Set it like I have it in the attached picture. Add a static text box for a label if you'd like. You'll see I've done that in the picture.
3. Set that DRO to a #VARS. You set it in the DRO properties in the screen editor. See attached picture. If you don't use any System Variables just set it to 500 like I have in the example.
4. Add the following script to the PLC Script. I add my custom stuff at the bottom above the section that says "this is the last thing".
I have attached a second picture to show you how to get to the PLC Script. Select the screen in the screen tree manager. It is the top item. Then the Second option under properties, the lightning icon, and then the 3 dots at the end of the PLC Script line. That will open up the Script.
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--Chip Load Calculator
local FluteCount = mc.mcToolGetDataExDbl(inst, 1, "Flute Count")
local RPM = mc.mcCntlGetPoundVar(inst, 1242)
local Feedrate = mc.mcCntlGetPoundVar(inst, 1244)
local ChipLoad = ((Feedrate/RPM)/FluteCount)
mc.mcCntlSetPoundVar(inst, 500, ChipLoad)
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This should get you going.