Your Personalized Robotic Fabricator which does high precision work in no time
A computer numerical control (CNC) router is a computer-controlled cutting machine related to the hand-held router used for cutting various hard materials, such as wood, composites, aluminium, steel, plastics, glass, and foams. Instead of routing by hand, tool paths are controlled via computer numerical control
Engraving Letters and Art on Wood
Generally speaking, plywood cuts best at a rate of 80 inches per minute (ipm) and a depth per pass of about 0.4 inches. Acrylic plexiglas works best at 130 ipm, with a depth per pass of 0.03 inches.
If the sheet is too big and covers the entire table, then using the threaded holes is not possible. You can use adjustable spring clamps to hold down the stock
CNC Coordinate Systems
To ensure that you’ve placed your Work Coordinate System correctly and to verify your program, conduct an air pass before actually cutting your part. With the Z set well above the top of the stock, you'll be able to follow the toolpath to ensure that it's oriented properly and doesn't have any catastrophic errors.
I you don't have a zero plate, you'll have to zero manually. To do this, just put a piece of paper down on the top of the stock, then nudge the spindle down until it touches it. You should be able to move the paper but feel a little resistance on it. This should give you a zero that's close enough to perfect that your toolpath will give you the results you want.