I recommend getting the onsrud catalog honestly love their bits too personally.
Cnc best way to mill down a sheet of acrylic.
I took a 2 flute 1 2 inch bit through acrylic and it came out looking magical.
Can get in the way of cutter or dust shroud.
When we cut acrylic sheet with paper masking you can actually see grooves in the cutter where it s cutting through the masking.
We recommend using a bit designed for acrylic cutting.
Holds down the entire part with even.
While you can use bits of all sizes it s generally advisable to use the largest bit possible for your design as this increases depth possible stability and removal of waste material.
Drilling threaded holes in acrylic using helix drilling and thread milling one strategy that we ve found to be effective for milling threaded holes in acrylic consists of a one two punch helix drilling first and thread milling second.
As an example we recently helix drilled an acrylic part with a 2mm single flute end mill at 20 000 rpm and a feed rate of 10 inches per minute with 1 0mm z infeed.
Fast once set up.
What kind of acrylic is better for cnc machining typically acrylic blanks are manufactured using two methods.
I use a straight bit because i find the finish to be better in cutting acrylic.
You will never get the best results using wood bits to cut acrylic as cutting and chip removal is key.
Typically with acrylic the wider diameter the mill the glassier the finish.
I use them all but prefer the straight.
Acrylic thickness from using both methods usually varies from 1 5 to 25 mm.
I have used a magnetic chuck on our old tired manual bridgeport mill when cutting steel.
Towards the bottom you will see charts for various types of material.
Our customers typically get the best results using o flute end mill bits.
Large pieces of flat stock securing other fixtures.
I have also used high strength magnets such as the magsquare 600 to hold thin sheets of aluminum galvanized steel and acrylic to the machine s cast iron table for cutting.
If you read online many posts will have you use the largest diameter end mill that you can.
Up spirals tend to lift the part and down spirals shove the material into the spoilboard.
We found that we get the best results using an o flute end mill.
The first method is used to manufacture sheets while the other is used to manufacture sheets and any other kind of form.
Production parts larger than 10 square inches with a flat bottom surface.
