[tahustvedt]

So far everything is working perfect as long as I go through the routine of enabling, then disabling the plugin. Must be a bug.

[tahustvedt]

I'm an idiot. I forgot to keep an eye on the dust cyclone bin. It has been full for probably a long time. :P I guess that explains why there's dust around the dust extractor bag.

Attachment 228078

[tahustvedt]

I cut this with a single pass. 6mm pass depth with a 1/8" single flute chinese endmill. I have to try things to convince myself that it's possible.

Attachment 228512

[Tkamsker]

6mm ? I m impressed please which rpm and mm/Sek did you use to Cut ? Was it an 2 or 4 flute Miller ?


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[tahustvedt]

It was a 1 flute endmill. I had programmed 6000 rpm, but broke the tool during ramp in, so I raised it. I cut at 8000 rpm and 2.7 mm/s feed rate. I ramp plunged at 2.7 mm too over a distance of 6mm. Maybe the tool would have survived the plunge at 6000 if I had plunged at 1 mm/s instead.

I used mist coolant. There was a lot of chips stuck to the outside of the cut, but the S came out exactly as pictured.

[Tkamsker]

But i guess the Wall is angeled ? Right Good enough for sign but i am impressed that it didnt Break in 1 Cut ,..


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[tahustvedt]

Yes, the edges are slightly angled due to tool deflection. A finishing cut will make them straight. I'm going to mill more aggressively from now on, at least when I do pockets.

[tahustvedt]

I made a quick release handle for the dust shoe today. I planned to use a knob screw, but figured this would be even better if I could get it to work. It works beautifully. Same principle as is used on modern bicycle wheels.

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Attachment 229114

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Attachment 229116

[ger21]

More outstanding work, as usual.

[tahustvedt]

Thanks, Gerry.

I ordered some sluminum to mill parts for a rotating axis. I'm thinking of making it a two stage belt drive with a total reduction ratio of 1:36. I don't know how much backlash or elasticity there will be in the belts though. I want a big through hole (40 mm), but turning steel of that diameter in my mini lathe is a nightmare, so I'm probably going to make the shaft from aluminum.

[wizard]

Thanks, Gerry.

I ordered some sluminum to mill parts for a rotating axis. I'm thinking of making it a two stage belt drive with a total reduction ratio of 1:36. I don't know how much backlash or elasticity there will be in the belts though. I want a big through hole (40 mm), but turning steel of that diameter in my mini lathe is a nightmare, so I'm probably going to make the shaft from aluminum.

It probably would be worth the aggravation to make that shaft out of steel of some sort. I don't know about your design but you could start with a piece of tubing, maybe a bit of DOM, to save you a lot of time with boring. The other thing to do is to gear down your lathe some. Aluminum is great for some things but sucks for wear around threads and seating surfaces. This is such an issue that frankly it might pay to have somebody make a spindle out of steel.

[tahustvedt]

I can make the face plate from steel, and the shaft fom aluminum. The shaft will be such a simple design that I can make it from aluminum with no effort at all, and replace it with a steel shaft later if it's a disaster. I plan to make it from a 40x60 piece of extruded tube, and make a separate face plate.

We have a large machine shop at work with a CNC lathe, a large manual lathe, mills and large grinding machines, but even thhough I have turned a lot of things and am very careful when I work, I am terrified of those machines, because they'll "rip my arm off" if I do something stupid. :P I'm not a trained machinist after all.

I just realized that the Z-assembly on machine is well suited to adding another axis to rotate the spindle around the X-axis. If I ever find a reasonably priced CAM software that could actually program for that axis I will consider doing it.

[tahustvedt]

Made some rings today. I think I'll try to sell them when I'm done. I will make a tiny 3D map of our local mountain on each one. I did it yesterday with a prototype ring, and it was pretty cool. I'll post a picture tomorrow when I have milled the map on these.

This is what they look like right out of the machine. No finishing of any kind has been done to the:
Attachment 229626

[ger21]

What do they look like before you start cutting them? Are they cut from flat plate?

[tahustvedt]

Yes. 3D milled on both sides from a flat 3/8" thick piece of 6061-T6 aluminum.

Here's the map on the one I made yesterday. The tool is a pyramid bit with a 0,1 mm diameter tip, which is probably the limiting factor. The ring on this didn't turn out as well as on the new ones. I made adjustments based on this first attempt.
Attachment 229630

[tahustvedt]

[tahustvedt]

I received a wireless XHC pendant thingy a couple of days ago. I never knew how useful it could be. It makes operating the machine much more practical, and is much safer than using the arrow keys on the keyboard to jog. It feels pretty solid and well built as well.

I bought this one. It came with a little driver CD: 2 4G Wireless Mach3 MPG Pendant Electronic Handwheel for CNC Mac Mach 3 4 Axis | eBay

[tahustvedt]

First attempt at cutting bamboo. It's amazing. I love this material. So clean cutting. I used an end grain butcher block (I don't have access to anythign else) and I have to change the program to make it compatible with the grain orientation. The beak of the bird model broke off so I'll have to sand it manually. In hardwood the grain holds the nose in place via a tab. I wish I could buy bamboo plywood and sheet material somewhere, but if I sell the bamboo birds I make 6x more than the butcher block costs.

I could order a kitchen bench top sheet, but it's incredibly expensive.

Attachment 232882

[tahustvedt]

Here's what the finished bamboo end grain board bird looks like. Pretty cool effect. The bird on the right is hardwood, not bamboo.

Attachment 233110

I'm so happy with this bird design.

[CarveOne]

Your birds are interesting. Are they cut as left and right side two side machine operations, or as two halves glued together which allows hollowing out the flat side?