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November 28, 2014, 03:22:37 PM

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| |-+  Show"N"Tell ( What you have made with your CNC machine.)
| | |-+  Gertrude Gets Some!
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Chris.Botha
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« Reply #360 on: November 23, 2014, 03:16:44 AM »

SO all looks like its running ok!

Clip of the path running https://www.youtube.com/watch?v=Pp1ENjXegEU


Clip of the piece done https://www.youtube.com/watch?v=K46d7-Wb5Ak

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Tweakie.CNC
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« Reply #361 on: November 23, 2014, 03:42:55 AM »

Absolutely brilliant work Chris - well done you and your mill.  Wink

Tweakie.
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Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
rcaffin
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« Reply #362 on: November 23, 2014, 03:56:05 AM »

Quote
SO all looks like its running ok!
Yeah, 'orrigh. Not a lot of TIR there either.
(Drools quietly in the background.)

Um - just one Q. How do you make sure there are no wax fragments left on the master before you make the mold? Brush? Vaccuum?

Cheers
Roger
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Chris.Botha
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« Reply #363 on: November 23, 2014, 05:06:36 PM »

it depends what you cutting with, usually i use a tapered ballend and there is not need to clean up with more than a soft paint brush, but with pyramid (3 flute) or profile tools you can get compaction in narrow spaces and this si very much dependant on feed/spindle speed, too slow it compacts, too fast it melts back to the surface, in either case you need a reverse vacuum watergun to clean it up.. dangerous when you have parts with fine detail..

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rcaffin
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« Reply #364 on: November 23, 2014, 06:05:11 PM »

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but with pyramid (3 flute) or profile tools you can get compaction in narrow spaces and this si very much dependant on feed/spindle speed, too slow it compacts, too fast it melts back to the surface,
Hum - sounds a bit like dentistry (I think). Light cuts with fast traverse?
Does an air blast help?

Quote
in either case you need a reverse vacuum watergun to clean it up.
Is that also like what a dentist uses?

I am being educated. Thank you.

Cheers
Roger
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Chris.Botha
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« Reply #365 on: November 24, 2014, 07:03:17 PM »

uhhhh.. its called a spot gun. it has a motor that generates a vacuum that creates a very high velocity microstream.. so high that if your fingers cross the stream it injects the water under your skin creating instant "blisters".. you were warned...

https://www.youtube.com/watch?v=bCuxrXCI2QA
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rcaffin
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« Reply #366 on: November 24, 2014, 08:10:33 PM »

Could be a higher pressure than the dentists use ...

Cheers
Roger
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