GearHeads Forum

Here is another small one.

http://gearotic.com/ESW/FavIcons/http:/ ... 266#p14266

Hessel

Your post was my inspiration to actually try making a guilloche pattern!  It took a while because of some knee problems (you'd think that with two knees, 4 on a moose, that there's enough redundancy it wouldn't matter) it didn't happen until recently.  My results aren't as good as yours, they're on a $200US machine with a 7000 rpm 100W spindle and those cheap flat sided V bits, plus there's operator issues.  I need to find out what angle V bit works best, trying to avoid an Amazon shopping spree and just buy a bunch of them, and the inexpensive assortments are lower angle (10 to 40 iirc) bits.  Might even try an inexpensive diamond drag bit once I get the technique down.

I found that while trying to mouse move the sliders approached and exceeded my dexterity limits that the keyboard arrow keys would work.

I've been whiling away the morning watching YouTube videos on Guilloche (my excuse is limited mobility, but when Mrs. Moose notices that will come to an end) and stumbled across an explanation of how a native french speaker pronounces guilloche; trying to pronounce words I've only seen in writing can be amusing.  FWIW (80% of everything on the Internet is sheep manure), https://youtu.be/qQiQSu1XLTY

Kirk

Kirk,

Great ones are (you probably have seen them):

https://www.youtube.com/watch?v=MS_G8Vm1gyQ part 1-5

and:

https://www.youtube.com/watch?v=9VKASuwatG0

Hessel

Thanks, Hessel, I saw the second but not the first series.  Bit bad on the micing but nice to watch.  That sure was a lot of stepping and adjusting to get the watch face pattern, far more than I expected.  Find the right cutter (or drag bit) and CNC sure looks like the way to go.

I saw a video where somebody engraved a penny with a one flute V bit, like mine, with the spindle turned off.  Don't think I want to try it with these skinny bits, but something with a steeper angle might work.  From watching and Internetting around 90s give a more pleasing shape to the cut, allow better definition with closer together lines, and overlap well.  Maybe I'll succumb to temptation (the evils of one click buying) and get a set, can always add to them later, and see if that holds true on the underpowered wonder.

Kirk

i got one of these

http://cnc-aid.com

to engrave/mill pcb's  , not a great success for that but it does a nice job engraving metals
with those flat v bits.  makes zeroing and doc less critical plus less tip bust offs

Hi Guys:

  I'm back at 4:00 am yesterday and am Jet Lagging my way back to sensibility.

I have to say I was pleased to read this thread. The work is in my opinion outstanding. 
I've always described myself as a frustrated artist and when I write a module like the
guilloche its my way of teaching myself something, often at the request of
someone from these pages or an interesting math paper that enters my reading list.

  Sometimes, as in the case of CNC in general I go on to gain some expertise in
the subject, but often I learn enough to satisfy my curiosity and move on to the next
project. In those cases I never develop much  in that subject but instead hope it
inspires others to do so by introducing them to the subject and letting them follow 
though to becoming experts in their own right.

  This is a great example of that. Ive found that the artist is usually his worse critic
and Kirks work looks better than he thinks. There are a couple of superb packages
out there for more in depth guilloches as mentioned and I'm really pleased this
module gave reason to seek them out.

  If you guys would like to list in bullet form here any corrections I can do to make it
a bit easier I will see what I can do. I dont think Ill be making adding capabilities
to it for more complex operations but I'm happy to fix any deficiencies I can do
in reasonable code time.


For almost 2 years I've been working on a module for linkages that has sucked me
into a black hole of learning math on a level at which I simply dont belong. It may
or may not ever get released but it has dominated my coding time for awhile and is
why I can only go so deep in adding to a present module.

  Thanks to all that kicked in here, it adds to an archive of knowledge on a very
interesting subject in the context of machining. As my head clears its 5 hour
overrun ( or is that underrun ), I will start adding to the codebase as always.

Great thread..

Art

Richard, that spring loaded gadget claims that it works up to 50K RPM.  The ones I've seen are essentially tubes with a spring in them, no way to grip the bit and spin it.  How does it keep the bits turning?  Or let them spin for drag engraving, although that might not be a issue for the conical diamond bits.

I've been looking at this drag tool, but need to exhaust V bits first, just ordered a 2 flute 90 degree off Amazon, all the one fluters were ship from china and I'm too impatient.  Cost about the same as 5 or 10 of the flat sided single flute bits, hope it's 5x as good

Kirk

Art, glad to see you weren't trampled by one of my wild Alaskan brethren!  Hope you enjoyed the trip!

I make no claims to artistry, that belongs to Mrs Moose and the three moosettes who got it from their maternal art teacher grandmother (or mom for the Mrs).  Maybe it's the engineering background but I enjoy geometric art.  Made a trip to Azerbaijan a few years ago where everything is covered with it!

I remember I took lots of math classes, just not what was in them.  My programming background was mostly OS and real-time and none of this gooey stuff, so I'm really glad you're a lot better at it than I am.

Along with the V bit I ordered a book on Guilloche, history and discussion of the mechanical gadgets from the past rather than modern CNC techniques.  Lots of time to sit around and read for the near future (looks like I get a final surgery and new knee around late September) and hope I'll get some ideas.  Rosettes, followers, and pumpers are far more than you'd want to add to Vexx.

Besides Guillochomatic, Bill Ooms has public domain rose engine simulation software, and the (apparently late) Alan Battersby (archived site here)wrote a Bazly pattern simulator in g code, along with other rose engine software.  Don't think I could get a rose engine past Mrs. Moose just yet.  Plus there's still gears and flourishes to try first on the baby router.

Any recommendations for carving implements, V bit angles, or one of those diamond dragon bits?  How to tweak Vexx to get something like the 3 dimensional appearing picture I found above?

Thus continues the trip down the rabbit hole.  Too many interests, too little time... 

Kirk

How does it keep the bits turning?

i have an older model, the flat of the v bit holds the bit still. you need to insert bit into tube from top , then add spring  then grub screw compresses the lot in the tube.  its a bit of a fiddle.  its unclear how new model works but its much more costly and implies bits can be fitted from bottom without disassembly.
i use it at 10000 - 22000 rpm with no vibration issues

Kirk:

  Cant give you much on technique or bits, Ive been using laser for my testing..

Art