Diamond drag Bit recommendations

[Aussie]

Hi All,

Would like to make some Edge lit LED Signs - What is your recommendation for spring loaded bits ? 60, 90, 120 deg ? Brand etc

Thank you
Ron

[gkas]

I just used some spring loaded cheapo diamond drag bits on eBay. I think I paid $20-30 USD for them. I used mostly 90°. They came out pretty good. Turn your spindle off.

crv file https://drive.google.com/file/d/12W-6QM ... sp=sharing

[Aussie]

I just used some spring loaded cheapo diamond drag bits on eBay. I think I paid $20-30 USD for them. I used mostly 90°. They came out pretty good. Turn your spindle off.

Drag Bit.jpg

crv file https://drive.google.com/file/d/12W-6QM ... sp=sharing

Ok Thanks.
Did you use the engraving tool path ? if so what Pressure/Depth ?

[gkas]

Check the crv file I uploaded to Google Drive. The link is in the text.

[FixitMike]

I ran some tests of my diamond drag bit at different pressures. There was very little difference that I could see. So now I run it at .06", which is more than enough to allow for variations in the material thickness.

[Aussie]

Thank you for the replies. A couple of questions.
When setting the Z 0 with a spring loaded drag bit... do you compress the bit and then set Z0
What do you consider the maximum vertical height that will be illuminated.

Here is my first attempt.

[FixitMike]

You set the Z 0 with the diamond just touching the reference surface. The pressure setting will cause the bit to be compressed that much when it is marking the material.