|Forum topic by KnickKnack||posted 01-19-2012 04:34 PM||3265 views||1 time favorited||9 replies|
01-19-2012 04:34 PM
For about 18 months now I’ve had a (I think) neat design for a tray. But it involves curves on non-concentric circles…
In the past I’d have done this with sanding but that never seems to be quite right, and, I figure, I ought to be beyond that now.
Then, last night, I had a brainwave. About 2 years ago I tried routing insulation.
Here, I think, is the potentially very cool bit…
I experimented with the non-concentric circles (although I made them concentric – go figure!), of different radii…
This one I cut anti-clockwise – I get a very clean cut nearest the operator, and a slightly more ragged cut away from the operator.
Note that you do not want to go all the way through – enough that you’ll be able to use your flush-trim bit is enough. Leaving more not cut gives the thing more stability.
I then picked a new centre-point for the next cut. Drilling this hole didn’t work – way too big and fluffy. Pushing through a screwdriver worked way better. Hand tools – 1, Power Tools – 0!
I then made the next cut clockwise, to give me the cleanest cut away from the operator…
(This picture shows the end of the cut)
Now I have this…
which I can just hack off with a knife. A very small amount of cleanup with very gentle use of 400 grit and I have a template…
Stage 2 – Use it as a template
the thing you need to be careful with here is heat on the bearing roller. This is polystyrene, after all and, whilst it’s pretty firm, it will melt if the roller gets hot and then, well, you don’t have a template any more.
I wish now I’d taken more care and actually made something I’d want to use, since this is a jolly fine template!
The blue template itself could be used again, but I think it’s going to be better to make a copy onto a more permanent template – MDF, pine etc etc
I think artistic types could have a lot of fun with this, so I thought I’d share.
Anyone who has done this before, or anyone who has ideas for how this might be improved – please chime in.
-- "Do not speak – unless it improves on silence." --- "Following the rules and protecting the regulations is binding oneself without rope."