The Shop > Wood & Stuff
Banjo Build
S. Heslop:
Just going with this for the toolpost. Turned the thing by hand and it seems to be cutting okay.
For adjusting the depth of cut I can just use this threaded rod with a couple of nuts on it, and a bit of trig, to tap the tool forwards in the holder. I'll probably be moving the whole thing forward a few times to reduce the overhang when roughing this out.
Need to deal with the runaway speed control next though. My first thought was dimmer switches but they're surprisingly expensive and I can't find any nearby rated at over 400w. I guess i'd need about 800 for this drill.
Wonder if it'd be possible to take the speed controller out of another power tool...
Will_D:
We use these to control out boilers in the homebrew world:
http://www.ebay.ie/sch/i.html?_from=R40&_trksid=p3984.m570.l1313.TR0.TRC0.H0.X3800w+dimmer.TRS0&_nkw=3800w+dimmer&_sacat=0
They really are rated at 3.8 kW and are pretty cheap (from China) or OK from the UK.
The heatsinks need to be earthed (to be sure to be sure) and will get hot if dimming 2.5 kW and above
[edit: fixed typo!]
HTH - Will
philf:
Simon,
Years ago I built a basic drill speed controller which worked very well giving a large speed range with good torque at slow speed and had very few components.
I used to be involved in making BT151 thyristors and still have a few somewhere if you fancy building one. The BT151 would need a small heatsink.
I can't find the control - I probably binned it as most drills come with speed control as standard.
Phil.
S. Heslop:
Thanks for the offer and suggestion but I want to see if I can get this working with what i've currently got for now.
I thought that maybe the runaway speed was caused by vibrations so I tried removing the trigger and mounting it to a board and using a cam to push it in. Unfortunately the speed controller is just garbage, and while it can start slower (but still fast) it picks up speed slowly till it's running full speed.
I think next i'll try taking the speed controller out of the jigsaw.
Turned a little bit with the runaway speed though. It's hard work turning the crank all the way in and out. I might just try autofeeding with the cordless drill once I figure the speed problem out.
krv3000:
Hi I like the switch mod
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