MPCNC Using a Diamond Tip Drag Bit

Hello folks. This is a video demonstrating the benefits of using a drag bit when engraving acrylic for making led illuminated displays.
Amazon link to drag bit
www.amazon.com/DIAMOND-SPRING...

[@stewartsmith3873]

Thanks man this was very useful

[@jamesdavis8021]

Thank you for the explanation.Most videos on this subject,show the machine running.That doesn’t tell me anything.

[@AntonJMiller]

do i need to take the paper off or can i leave the protective film on it?

[@widgetwiz3d756]

It is better to remove it.

[@KenOfHouston]

What factors do you take into account in generating the tool path?

[@widgetwiz3d756]

Hello Ken
I use Estlcam and these are the settings I used for Yoda.
120 degree diamond tip drag bit (router off).
Dia.- .010"
Z step- .030"
Stepover- 5% (You can use from 1-5%. This is typical I believe)
I only did one pass however some folks do more to etch deeper. I hope this helps

[@KenOfHouston]

@@widgetwiz3d756 Yes = that provides a starting point and the strategy of the process. Thanks!

[@divchief07ut]

What are you using for the base?

[@widgetwiz3d756]

Sorry but what do you mean by base

[@PhenomenalPictures]

i Cant seem to get that bit to Zero on my router, when i try It bends the bit, do i have to tighten the screw more ? Router - shop bot

[@widgetwiz3d756]

This bit has a spring loaded tip. You want to compressor the spring just a little to apply enough force to etch. You want some spring travel left over. You don't want to bott it out. If you are actually bending the bit your depth adjustment is too much. You may need to adjust your home switch position and/or make software adjustments. Remember, just a little spring force is typically needed. Good luck. 👍

[@cristicioaba3029]

How do you finish the edge on acrilic?

[@widgetwiz3d756]

It really depends on the look/effect you want. I like to sand the edges. You can use a small torch to heat the edges to make them clear but be careful not to apply too much heat or the acrylic will blister. My suggestion is to practice on some small pieces. You do want the edge where the LED strip is going to be clear so that you get maximum light passing through the acrylic. Good Luck!

[@cristicioaba3029]

@@widgetwiz3d756 what kind of sandpaper you use? What grid?

[@widgetwiz3d756]

@@cristicioaba3029 150 grit should be ok

[@wadetomczyk8043]

What's your depth .005?

[@widgetwiz3d756]

Your depth can be whatever you like as long as you do not compress the spring too far and run out of travel. The more you compress the harder the bit scratches the surface. It does not have to me much to get good results.

[@Arun-zh8ze]

Did Laser engraving possible this work???

[@widgetwiz3d756]

Yes. This can be done with a laser, actually easier and faster.

[@Arun-zh8ze]

@@widgetwiz3d756 thank you 😊