The Shop > Finishing
Tumbler Trials & Tribulations
foozer:
--- Quote from: 1hand on February 05, 2011, 03:08:51 AM ---I'm interested in the grits your using. Is it like a powder? The rotary came with some stuff for rocks thats fine like a powder.
I figure about 2 or 3 more 12pks I have this polishing down. :beer:
Matt
--- End quote ---
Yup, the powder grit is geared more for rock, sand paper without the paper. Looked at the piece this morning, the outside circumference has a nice frosted feel to it, nice and even. The faces appear hardly touched, but they were hacksaw cuts so do not really qualify in the example. I did put a good fingernail catcher scratch (0.001 -0.002?) upon the circumference to use as a reference. It is just about gone. Trying to get an idea of how much material is removed vs. time - grit.
Give it another 5-6 hours and switch it over to the 220 grit. I know the object is to remove as little material as possible to achieve the best possible finish but like sighting in the 44 mag gotta have a wide range to start with. Spent 20 years listening to the "We've always done it this way" without any explanation as to why, most cases no one actually knew, also spent a few weekends working and grumbling as the "why" had turned into "OH! Thats WHY." Darn tool room never did stock those cans of Edge Margin or that mysterious part stretcher tool.
Rotary tumbler also seems to be sensitive to the amount of media contained. Too much and the parts don't get trapped reducing the slide time. Seems should be just enough so the media and part is carried up the side leaving just enough ramp for the parts to fall, slide down against.
Coffee, that's what I need. UPS slow boat to bring the vibratory tumbler one of these days.
Robert
1hand:
--- Quote from: foozer on February 05, 2011, 11:30:39 AM ---
--- Quote from: 1hand on February 05, 2011, 03:08:51 AM ---I'm interested in the grits your using. Is it like a powder? The rotary came with some stuff for rocks thats fine like a powder.
I figure about 2 or 3 more 12pks I have this polishing down. :beer:
Matt
--- End quote ---
Yup, the powder grit is geared more for rock, sand paper without the paper. Looked at the piece this morning, the outside circumference has a nice frosted feel to it, nice and even. The faces appear hardly touched, but they were hacksaw cuts so do not really qualify in the example. I did put a good fingernail catcher scratch (0.001 -0.002?) upon the circumference to use as a reference. It is just about gone. Trying to get an idea of how much material is removed vs. time - grit.
Give it another 5-6 hours and switch it over to the 220 grit. I know the object is to remove as little material as possible to achieve the best possible finish but like sighting in the 44 mag gotta have a wide range to start with. Spent 20 years listening to the "We've always done it this way" without any explanation as to why, most cases no one actually knew, also spent a few weekends working and grumbling as the "why" had turned into "OH! Thats WHY." Darn tool room never did stock those cans of Edge Margin or that mysterious part stretcher tool.
Rotary tumbler also seems to be sensitive to the amount of media contained. Too much and the parts don't get trapped reducing the slide time. Seems should be just enough so the media and part is carried up the side leaving just enough ramp for the parts to fall, slide down against.
Coffee, that's what I need. UPS slow boat to bring the vibratory tumbler one of these days.
Robert
--- End quote ---
I look at the rotary as the deburr and rough polish. I think its going to easier to get repeatable results in the vibratory for the end finish.
foozer:
--- Quote from: 1hand on February 05, 2011, 11:40:22 AM ---
I look at the rotary as the deburr and rough polish. I think its going to easier to get repeatable results in the vibratory for the end finish.
--- End quote ---
Your right, it does quick work on the edge debur. Agree on your conclusion to the vibratory results. I putt around so should any one ask as to why I do something a certain way I can say in a voice backed by failure, "I tried the other methods" Let me tell ya what happen, kids then would go off a-running "Quick! get out of here, Dads gonna tell another story" :) Most times an hour or so talk about why, gave better results than them getting grounded, but that's another story.
Robert
1hand:
:scratch: I'm thinking this thing would mix up a hell of drink, if nothing else. :headbang:
Russel:
--- Quote from: 1hand on February 04, 2011, 08:25:12 PM ---[...]
Any pointers on taking better pics?
[...]
--- End quote ---
Just the basics...
It looks like you are using a Nikon coolpix S220. I recommend using close-up 'scene mode', using a small tripod, and using the self timer to prevent motion blur.
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