I am using the Shapeoko Pro XXL while trying to use a 1/16" O flute 1/4" shank bit to make pocket cuts of different fonts into acrylic without much luck. Even after using an 1/8" O flute for clearing cuts and using recommended speeds and feedrates the bits keep breaking.
For instances I have been using the Astra Coated* Bits&Bits 1/16" ‘O’ Flute Up-Cut Spiral Bit – 1/4" Shank (425-UP062) at 18000 RPM with a plunge rate of 30 and feed rate of 60 IPM with a cutting depth of .0625 (these are recommended on Bits and Bits website) and I have broken 3 bits even tho I have tried adjusting the plunge and feed rates.
Additionally, I have also broken 3 Amana Tool 51441-K Spektra Coated SC Spiral O Single Flute, Plastic Cutting 1/16 D x 1/4 CH x 1/4 SHK x 2 Inch Long Up-Cut CNC Router Bit while using it’s recommended plunge, RPM and feed rates from the Toolstoday website.
Obviously, something is wrong. Either I am completely in the dark when it comes to cutting acrylic as far as setting the correct speeds and feeds, the bits themselves are defective or perhaps I am not using Carbide Create incorrectly while setting toolpaths. For example, does Carbide Create have the ability to adjust ramp plunge rates?
I need help (yes, my wife has been telling me that for years!) - ANY SUGGESTIONS OR HELP would be greatly appreciated. (BTW and in case you couldn’t tell, I am a novice when it comes to using a CNC and it’s associated software.)