plexiglas key chain - need some help

[Tim Lucas]

Hi all,
I have a little project I am working on and would like some input to clean it up a lot.
Making a high school logo in Plexiglas 3" tall by 2.5" wide - I am sure I am not using the correct bits but am using what I have a the moment.

Used a 1/8" ball nose at .75 inch sec & .013 - used a 1/8 straight bit .75 inch sec in 3 passes to cut 2.13 with 2 tabs

Cutting went ok but it looks bad, I have been looking at some engraving bits but I am not sure what size I should get

Thanks in advance for advice & help

Tim

please excuse the dust

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[David Iannone]

Hey Tim,

My advise would be to pick up a 60 and 90 degree bit and try re-toolpathing.

http://store.shopbottools.com/collections/cutters/products/double-flute-bit-90?variant=411085093

http://store.shopbottools.com/collections/cutters/products/double-flute-bit-60?variant=411085073

.75ips ms and .25 z is where I would begin the cutting and speed up or slow down from there.

Looks like a cool project.

Dave

[Xray]

A diamond drag bit is what you need, not cheap but well worth the investment.
Tips last forever, they are capable of amazing detail and never any melting issues. I did this one with a drag bit, though it is 10x10 I have done 3x3 with equally impressive results.

http://www.talkshopbot.com/forum/attachment.php?attachmentid=22269&d=1416441855

http://www.ebay.com/itm/1-4-DIA-DIAMOND-DRAG-ENGRAVING-BIT-STAINLESS-BODY-TAIG-SHERLINE-CNC-MINI-MILL-/281654254505?pt=LH_DefaultDomain_0&hash=item4193e6dba9

[Tim Lucas]

Thanks dave and xray

[Tim Lucas]

Well - purchased a 60 degree sharp point engraving bit and it looks a lot better, thanks for the help.

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