Instructables

Planing The Tabletop of your Industrial CNC Router

Picture of Planing The Tabletop of your Industrial CNC Router
In order to get jobs cut evenly on your Industrial CNC Router, it's important to make sure your tabletop is even with your spindle. Even if you've made sure your routers legs are level, there can still be high and low points on the top surface. The best way to do this is using the spindle itself to plane the surface below.
 
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Step 1: Planing or Fly Cutting Bit

Picture of Planing or Fly Cutting Bit
The first thing you'll need is a planing bit designed to skim the surface of material. The bigger the diameter of your bit the quicker the job will be done. You can either run the bit up and down the table manually, or you can just use a post processor program to make a "pocket" the size of your table.

Step 2: Making a Pocket

Picture of Making a Pocket
In your Vectric Program, make a rectangle the dimensions of your tabletop (48" x 96" for a 4' x 8' table)

Set your origin positon as the bottom left corner.

With your rectangle shape selected (highlighted in pink) choose "Create a pocket" from your toolpath options.

Enter your bit information. Assuming you fly cutting bit has a 3" diameter, you can call your bit an end mill with a 3" diameter. 

Set your "stepover" at 40%. This is the overlap between passes back and forth and 40% should leave a fairly smooth finish. If you're seeing lines between cuts, you can increase the percentage to make it cleaner. (Keep in mind this also takes longer, so aim for a good balance.)

Set your depth at .0625 or 1/16th inch. We're only skimming not cutting.

Calculate the tool path and save the g-code and you're ready to send it to the machine.