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Thread: Upside Down Coping Sled
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14th August 2013, 02:54 PM #1
Upside Down Coping Sled
I made a coping sled a couple of weeks ago, with an 18mm base, planning on using a router bit extension for the extra height. In practice, the table shakes waaay too much for my comfort when using the router bit extension, so I put on my thinking cap and came up with a sled without a base, so that no extension is needed.
It works really well, so I thought I'd post it here in case it's of use to someone else in a similar position.
Edit: It runs in a mitre slot, but could be easily adapted for the perspex safety guard to run along the fence instead.
The sled:
a. Coping Sled.jpg
On the table:
b. On Table.jpg
It can hold timber up to 180mm wide, less a bit for a sacrificial backing piece and the stop block can accommodate up to 350mm lengths. Pretty short, but that's all I need. It handles timber up to 18mm thick.
I used 240G wet 'n dry paper on the grip surfaces, held on with DS tape so it can be easily replaced:
c. 240G W&D Grip Surfaces.jpg
To make sure that the frame doesn't move over time, the 4 main joints are glued, screwed then dowelled with 3 dowels each. I don't think it's going anywhere.
f. Frame Joints.JPG
I had to think a bit about the stop block - I didn't want to use a 'G' clamp. It works well. It grips on the 240G surface, so there's no chance of it slipping.
d. Stop Block Clamp.JPG e. Stop Clamp Parts.JPG
For angle fine-tuning, I slightly slotted the holes so that the front of the mitre bar can be swung slightly from side to side then tightened down. The second, unused pairs of holes are so that the sled can be moved over for larger diameter router bits, by moving the mitre bar.
In use, the workpiece still needs to be held down as it's pushed through, but it can't move around at all in the other 2 planes.... Steve
-- Monkey see, monkey do --
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19th August 2013, 07:52 PM #2Thankful Member
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Bloody great piece of work you've got there Steve. You should be really proud of your ability to nut things out and come up with what looks to be a simple device, but is in fact quite a complex bit of wood workery.
I just wish I had the nous to be able to think things out like you have.
Keep it up mate. You're doing great.
Bob
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19th August 2013, 08:05 PM #3
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26th August 2013, 09:19 PM #4
Great Jig Steve. It almost looks like a piece of furniture. Too good to use. LOL. I too enjoy making jigs. Especially if it lets me make something really accurately and people ask how did you do that. The last I counted I had close to 40 jigs. Most of them for the bandsaw and the table saw. Basically that is what Shopnotes magazine is how to make jigs to do otherwise impossible stuff.
Bret
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26th August 2013, 09:31 PM #5
G'day Bret. Thanks for that. I hope all's well with you.
The joints are a bit like furniture - I wanted to make d--n sure it didn't move once set up.
You're way in front of me at 40 jigs, I have about 7 or 8, counting the little spoked wheel jigs. Next up, when I get a moment, is a box-joint jig for the router table.
I've been playing with box-making a bit lately, but so far only mitre joints and the rabbet joints on the CGB body.
I keep looking guiltily at my poor little half-finished VW. I'll get back onto it soon and start a WIP, now that Winter's ending and I'm coming back out of hibernation. I did at least make the steering wheel and dashboard a week or two ago.... Steve
-- Monkey see, monkey do --
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27th August 2013, 01:12 PM #6
I have a box joint jig I made to go on my crosscut sled on the tablesaw. I use my dado blade set at 1/2" is mostly what I have made. I made one for the router table but you have to make the cut slower and I mostly did this for drawer making. So I had alot of box joints to make. Once it is setup right there is nothing like two box joints coming together. It is very strong and looks very classy. And the best part no fasteners.
Here is a pic of my jig. It is very simple with only 2 adjustmnets on the backside where it mounts to the fence. The hardest part for me was making the key. As at the time I didn't have a planer. So making a perfect 1/2" key was a pain.
Drawers I made for my lathe workbench.
Look forward to seeing your new jig.
Bret
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27th August 2013, 06:57 PM #7
Looks good Bret. Mind, I won't be making that many boxes at a time and will mostly use mitre joints for continuous grain. I'll make a couple with box joints, though, just to learn how it's done. Handy if I ever decide to get off my backside and make some drawers for tool storage.
I thought about setting mine up for 1/2", but love my metric, so settled on 10mm as a nice round figure for small boxes.
I'd like a table saw for this sort of thing, but am right out of space. A router is slower, but I don't really mind. After all, this is a hobby to fill up my spare time. Doing things quickly defeats the purpose. (That's my excuse for being so slow on my projects, anyway. )
I still plan to get a little lathe soon, but might have to pull it up into the ceiling for storage and drop it down when I need it. All the stuff I rarely use has been moved up there.... Steve
-- Monkey see, monkey do --
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30th August 2013, 12:13 PM #8
Man I hope you do get a lathe soon. Can't wait to see what you make on it. I think you would really enjoy a lathe. Can make so many things from bowls to parts for scale model cars.
Bret
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30th August 2013, 12:52 PM #9
Got to hand it to ya Steve.
Not only do you make nice things, you always seem to work out a jig to help you do it.
Thats one skill I don't have and will need to learn.
I know there are plenty of jigs in mags but most I've made didn't work for me.
the drilling holes for wheel spokes was one.
I tried 2 jigs from the web and both were not good enough.
Went with Steve's in the end and that worked fine.
Keep up the good work.
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30th August 2013, 08:56 PM #10
Hi Bret. I was looking at a couple of lathes at the Canberra wood show today. I've pretty much sorted out what I want - just have to save for it now. I'll keep my eyes open for a good second-hand one, too, just in case. Meantime, my electric drill and my lathe are one and the same.
Got some nice timber from Trend Timbers though, especially a piece of African Wenge that looks fantastic, , and a 20 piece set of router bits far cheaper than I could buy online.
Originally Posted by _fly_... Steve
-- Monkey see, monkey do --
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