Edge Roundover Techniques
Edge Roundover Techniques
What size router bit are you using to round over the edges of your cabs built with 1/2" material? What's your technique for something like the top or bottom front edge of a T39/48 where there is nothing for the roller guide to follow?
2X OTop 112, 3012HO, melded - 2X T39, 27", Lab 12 - XF 212 - 4 DR250, 2 melded, 2 straight
2 20" T39 3012LF - WH10 - WH8 - in the shop - 2 more 20" T39s
http://saltandlighteureka.org still need a trailer
2 20" T39 3012LF - WH10 - WH8 - in the shop - 2 more 20" T39s
http://saltandlighteureka.org still need a trailer
Re: Edge Roundover Techniques
3/8 looks best on 1/2 material.
always roundover from the top of the material whos edge you are rounding. doing it this way will prevent chipout from the router bit.
always roundover from the top of the material whos edge you are rounding. doing it this way will prevent chipout from the router bit.
Built:
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208
2x OT212 (delta pro 450a loaded, eminence psd)
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208
2x OT212 (delta pro 450a loaded, eminence psd)
- James Champer
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- Joined: Thu Aug 23, 2012 7:00 pm
- Location: BF Builder - Indianapolis
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Re: Edge Roundover Techniques
If it wasn't clear about the mouths of T39's and 48's from what sine143 explained.ripNdeb wrote:What size router bit are you using to round over the edges of your cabs built with 1/2" material? What's your technique for something like the top or bottom front edge of a T39/48 where there is nothing for the roller guide to follow?
Same technique applies, set them flat on their back and route away. You just have to be real careful and steady as the router base has nothing to ride on but that edge. This goes for any open ends (think Otops/Jacks back panel area, etc.)
It's not tough if you pay attention and take it slow.
Retired Authorized Loudspeaker Builder - Indianapolis, IN
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Re: Edge Roundover Techniques
I agree with 3/8" bit for edges, but find using a 1/2" bit on the corners helps best fit with large corners one tends to use on subs...
Built:
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...
DR 250: x 2 melded array, 2x CD horn, March 2012 plans.
T39's: 4 x 20" KL3010LF , 2 x 28" 3012LF.
WH8: x 6 with melded array wired series/parallel.
Bunter's Audio and Lighting "like"s would be most appreciated...
- Bill Fitzmaurice
- Site Admin
- Posts: 28620
- Joined: Tue May 02, 2006 5:59 pm
Re: Edge Roundover Techniques
Screw a guide board to the cab for the router base to follow.ripNdeb wrote:What's your technique for something like the top or bottom front edge of a T39/48 where there is nothing for the roller guide to follow?
- James Champer
- Posts: 301
- Joined: Thu Aug 23, 2012 7:00 pm
- Location: BF Builder - Indianapolis
- Contact:
Re: Edge Roundover Techniques
I've never had to do that but, makes good sense!Bill Fitzmaurice wrote:Screw a guide board to the cab for the router base to follow.ripNdeb wrote:What's your technique for something like the top or bottom front edge of a T39/48 where there is nothing for the roller guide to follow?
Retired Authorized Loudspeaker Builder - Indianapolis, IN
Re: Edge Roundover Techniques
3/8" is the standard for the plastic stacking corners too (although they'd work with 1/2", but wouldn't fully contact at the corner).
Or create an offset base for your router from 3/8" perspex - v. handy for other jobs too... any sort of profile work and with a few extra holes, good for a small circle jig also:Bill Fitzmaurice wrote:Screw a guide board to the cab for the router base to follow.