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Woodworking - Cross Cut Sled problems
Posted on 5/14/20 at 2:39 pm
Posted on 5/14/20 at 2:39 pm
Gents,
I've made a cross cut sled for my table saw twice now. Both times I have calibrated to a pretty close perfect 90 degrees. Since it's a jig, it sits in the corner a majority of the time and not on my saw. BOTH times after taking it off, it has come out of calibration. Has anyone experienced this with their cross cut sled jigs?
I've made a cross cut sled for my table saw twice now. Both times I have calibrated to a pretty close perfect 90 degrees. Since it's a jig, it sits in the corner a majority of the time and not on my saw. BOTH times after taking it off, it has come out of calibration. Has anyone experienced this with their cross cut sled jigs?
4
Posted on 5/14/20 at 3:19 pm to b-rab2
quote:
Has anyone experienced this with their cross cut sled jigs?
How did you secure your piece of wood to the jig that rides in the groove of the table saw?
That 3/4" wide piece of wood may be better suited to be set in a dado on the underside of your jig and glued in place. That way it can't be knocked out of whack unlike one just screwed to the bottom of the jig.
Posted on 5/14/20 at 3:35 pm to gumbo2176
My guess is it is actually the back fence that is moving more than the guide. If it was the guide, he could feel the slack as he pushes the sled through. If the back fence has moved, he may not notice until he realizes his cuts aren't square.
I assume you re-calibrated it? Is that back fence glued and screwed? Or is it just screwed?
I assume you re-calibrated it? Is that back fence glued and screwed? Or is it just screwed?
Posted on 5/14/20 at 3:43 pm to b-rab2
What kind of wood are you using for the sled and for the fence?
I have one that is probably 15 yrs old that is still spot on.
The front and back fences are just basic pine.
the sled is MDF.
the process i did is attach the runners.
screw and glue the fences
run the sled into the blade all the way through to get it square.
I have one that is probably 15 yrs old that is still spot on.
The front and back fences are just basic pine.
the sled is MDF.
the process i did is attach the runners.
screw and glue the fences
run the sled into the blade all the way through to get it square.
Posted on 5/14/20 at 3:59 pm to Crusty
Let me get home and I’ll take a picture and answer questions
Posted on 5/14/20 at 7:24 pm to b-rab2
I'm interested in making one myself.
Is it worth using polyethylene as the runner?
Is it worth using polyethylene as the runner?
Posted on 5/14/20 at 9:13 pm to WITNESS23
Same here. Was looking at the pieces on amazon.
Posted on 5/14/20 at 9:48 pm to eng08
Use the five cut method to figure out how out of square it is. Search YouTube.
Posted on 5/15/20 at 4:57 am to mikie421
OP, moisture is what knocking it off. Wood moves a lot. 
Try using plywood which will not move as much as a solid board.
Try using plywood which will not move as much as a solid board.Posted on 5/15/20 at 8:11 am to fishfighter
I forgot to take pictures last night. The bottom runners are red oak, the "base" is 1/2" baltic birch plywood and then I have MDF as the end boards, but they do not go all the way across which might cause some of the shifting.
Posted on 5/15/20 at 8:23 am to b-rab2
If it's built in a robust way, (and there are lots of ways to build a robust sled), and if it was as square as you say it was when you first calibrated it, it shouldn't move at all, other than the wood expanding and contracting with humidity.
Have you changed your blade between uses? What kind of square are you using to calibrate it? A square from Lowe's is typically not square.
As an earlier poster said, use the five cut method to determine how far out you are, then reset your fence to square.
Have you changed your blade between uses? What kind of square are you using to calibrate it? A square from Lowe's is typically not square.
As an earlier poster said, use the five cut method to determine how far out you are, then reset your fence to square.
Posted on 5/15/20 at 2:27 pm to bbvdd
quote:
screw and glue the fences
Missed a step brah. Need to add in that you set your back fence perpendicular (true 90) to the blade.
Posted on 5/15/20 at 3:27 pm to b-rab2
Watch William Ng's youtube vids.
This is his 5 cut method and how to make a cross cut sled
William Ng - 5 cut method
This is his 5 cut method and how to make a cross cut sled
William Ng - 5 cut method
Posted on 5/15/20 at 4:13 pm to idlewatcher
quote:
Need to add in that you set your back fence perpendicular (true 90) to the blade.
Yeah, I did for sure. Like I said, it’s been around 15 yrs since I made it.
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