Diamond drag bits

[jmac80]

Hello all
While I wait for the new CNC machine been made by JazzCNC I'm watching tons of various cnc vids on youtube every night with excitement :)
Last night I came across diamond drag compression bit mounted in the spindle, (spindle turned off) then just drag around to etch glass or stone etc..
My question is.. Is this bad for the spindle and mount assembly as your basically pulling it about with a force against it?
If not.. cool as it looks quite fun.
Cheers

[JAZZCNC]

While I wait for the new CNC machine been made by JazzCNC

Dodgy Geezer him watch it.!

No won't affect spindle provided not constantly using it this way. In which case you would have it mounted to Z axis in it's own holder.

[jmac80]

Off course.. mount it to the z axis.. makes sense and now you say it.. so obvious :)

[Dean jeffery]

I’ve just recently started using one of these engraving carbon is so much easier quicker and cheaper.

I only put a Z depth of .75 meaningless I no because it depends on spring tension.

[jmac80]

What one do you use mate?
I see this USA one with 1/2 or 1/4 shank for about $180.. then a UK based one for about £45..
Is the usa one just a fancy "Made In the USofA" sticker adding
£100? :)

$180
http://www.widgetworksunlimited.com/..._engrv-500.htm

or

£45
http://www.dragengraving.com/

[Dean jeffery]

I actually got mine from the good old US of A but was £56 if I recall from this seller, I’ve got a new diamond saved just in case.

https://rover.ebay.com/rover/0/0/0?m...2F292371269198

But that’s pants down price for what I’m doing it does the job just fine, I’m only engraving logos and my RC name on parts.

I used to use a normally engraving bit but carbons tolerances of +-5% means engraving was a ball ache, I only engraved .1 deep so some parts would get missed that’s when the ball ache came in I’d need to re do those missing bits

Engraving carbons only braking the resin so not a great deal of load.



Shows up real nice when you add some colour

[jmac80]

Oh man that look's sweeet
What do you use to add colours, just spray paint then wipe off glossy surface instantly with maybe a bit of masking..?

[JAZZCNC]

Oh man that look's sweeet

Dean makes some nice parts I've seen them in the flesh.

[Dean jeffery]

Cheers


I just used a sharpie pen colour then wipe off then keep doing it till it’s nice and clear, then used a Q tip dipped in petrol to get any off that dried before I wiped off

[jmac80]

simple but effective :)
Only thing with sharpies is life span, wife uses them on jewellery she hand stamps.
bit of masking and airbrush maybe the thing to try.
Have you ever tried laser engraving with your cnc router? also looking at them 4w laser addons and they look quite fun s well :)