mashop3d
CNC Ewok
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Posts: 39
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« on: August 01, 2019, 13:58:34 pm » |
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I have a hobby, woodworking. I managed to get a budget from my boss, to whom I have been married for as long as I can remember, to get a shapeoko cnc. I’d like a cnc lathe, but would end up in a divorce! So got this idea.... Since my grbl does not support 4 axis, i will replace the x axis with a spindle servo. The bit can still ride along the y, and up and down on the z. This is not a real cnc lathe but it will allow me to make: -dowels by keeping z constant, cutting along y, rotating a few, etc, - fluted dowels by lifting z and rotating, ride a bull nose along y, etc. - turning with v shape bit - or spiraled posts by moving y while turning Most of it would be done with pure gcode and a bit of math. A switch will allow me to alternate between cnc and lathe, just need an extra 10$ stepper. I have ordered it. The lathe will be on the cnc bed and removed when not in use. I will 3d print the spindle, and carve the frame. Stay tuned, I will post as this progresses.
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lloydsp
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« Reply #1 on: August 01, 2019, 15:21:26 pm » |
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Just keep your options 'flexible'. No matter how well it works, as soon as you have it built and working, you'll see things you'll wish you had done differently!
It's kind-of "The Murphy's Law of Home-built Tools".
Lloyd
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"Pyro for Fun and Profit for More Than Fifty Years"
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mashop3d
CNC Ewok
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Posts: 39
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« Reply #2 on: August 02, 2019, 01:51:43 am » |
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Words of wisdom.... 
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lloydsp
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« Reply #4 on: August 02, 2019, 18:05:03 pm » |
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OOoops! <grin>
Yeah... Well, one could do better than a power drill for a spindle! (and probably at not much more cost)
Lloyd
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"Pyro for Fun and Profit for More Than Fifty Years"
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Bob La Londe
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« Reply #5 on: August 02, 2019, 20:59:22 pm » |
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OOoops! <grin>
Yeah... Well, one could do better than a power drill for a spindle! (and probably at not much more cost)
Lloyd You can buy drills pretty darn cheap...
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Getting started on CNC? In or passing through my area? If I have the time I'll be glad to show you a little in my shop. Some Stuff I Make with CamBam http://www.CNCMOLDS.com
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lloydsp
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« Reply #6 on: August 02, 2019, 21:09:01 pm » |
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Yeah, but as you saw, how well do they work in that application?
Passably -- yeah, maybe for single-direction feeds -- maybe. Well? Nah...
Lloyd
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"Pyro for Fun and Profit for More Than Fifty Years"
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dh42
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« Reply #8 on: August 02, 2019, 21:22:56 pm » |
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Re In the past (2011) I draw some parts to do one myself .... but I never do it .. http://www.metabricoleur.com/t902-adaptation-tour-cn-1-etude-du-projetMaybe I'll do it a day ... if Andy adds the missing lathe operations in a future release ...  (facing, boring, grooving, threading ...) Other than end float in the bearings the main issue was with the chuck. Yep, not good for wood ...  ++ David
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« Last Edit: August 02, 2019, 21:27:29 pm by dh42 »
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Bob La Londe
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« Reply #9 on: August 03, 2019, 19:11:14 pm » |
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Many many years ago I had a wood lathe. I was a kid when I bought it. I made a steel pate with a drill chuck mounted that mounted on the face plate. It worked ok for rapidly filing a round metal part and keeping it "mostly round." I think a lot of those "look at what I made out all the wrong stuff" videos remind us that there is always a way to get there even if you don't have the "right" tool.
I gave that wood lathe to a friend in exchange for something I needed some years later. Many years after that his son gave me a big steel work bench with a Columbia vise bolted to it on the condition that I took all the boxes of tools and parts under the bench. "Oh bend my arm." LOL. As I went trough the boxes I found many odd thing, but for the life of me I couldn't figure out why somebody had attached a drill chuck to a flat piece of steel with some holes in it.
It was actually a couple years before I remembered that I was the guy who had done that nearly 40 years ago.
I mostly used that wood lathe for changing the taper on pool cues. I used to think I was half good at pool, and I liked the longer straight taper of a snooker cue over the continuous taper of a pool cue.
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Getting started on CNC? In or passing through my area? If I have the time I'll be glad to show you a little in my shop. Some Stuff I Make with CamBam http://www.CNCMOLDS.com
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