Holes in Acrylic

[Rhensley32]

I am trying to cut a 15/64 (0.234") hole in 1/2" acrylic using an 1/8 O flute bit on my 3XXL with the Carbide router. I am having the hardest time getting the hole to be accurate in dia. I am using Fusion360 to generate toolpaths. The holes are turning out to be smaller than the 15/64". I have tried to make the holes bigger but find that the consistency is just not there. One hole will be good then the next will be too small. I have also tried several different toolpath types but still can get accurate holes. I have to be missing something or maybe the 3XXL is not rigid enough or maybe the stepper motor increments are holding me back. I am using the Amana 51445-K 1/8 O flute bit with a 1/4" shank. I was hoping the 1/4" shank would help with deflection.

What type of tool path would you recommend and what feeds and speeds? Or any other advice would be awesome.

Thanks

Ryan Hensley

[kacper.suchomski]

Hi

The toolpath strategy has no effect on dimensional quality (unless you marked an allowance and forgot about it).

The source should be sought in:

• rigidity of the machine
• quality of the clamping
• hardness (and other characteristics) of the material to which the cutting parameters should be adjusted

[programming2C78B · Accepted solution]

you're feeding too fast because its a small feature. check all belts for tightness too.

https://www.youtube.com/watch?v=6wLU97gVo5k

[Rhensley32]

This seemed to work along with changing to conventional milling.  Thanks man!