I want to make a miter sled similar to Incra's where you slip a miter
gauge into a miter track on the sled.

To do this, I need to attach a runner to a sheet of plywood. No
problem since it doesn't have to be exactly parallel to the ply. But
on the top of the sled where I plan to put a T-Miter slot it has to be
parallel to the runner in order for the miter gauge to be parallel (to
the blade) when it's installed. How do I ensure that the T-Miter track
and runner area parallel to each other? Incra does this with an
aluminum channel that has both the runner and miter slot machined in it.

wrote:
I want to make a miter sled similar to Incra's where you slip a miter
gauge into a miter track on the sled.

How do I ensure that the T-Miter track
and runner area parallel to each other?

Make the miter-track fixed at one end and adjustable at the other, then
fine-tune it when its all put together?

Chris

The T-Miter track goes into a dado (top of ply). The runner doesn't
(bottom of ply). Both have to be parallel.

wrote in message
ps.com...
I want to make a miter sled similar to Incra's where you slip a miter
gauge into a miter track on the sled.

To do this, I need to attach a runner to a sheet of plywood. No
problem since it doesn't have to be exactly parallel to the ply. But
on the top of the sled where I plan to put a T-Miter slot it has to be
parallel to the runner in order for the miter gauge to be parallel (to
the blade) when it's installed. How do I ensure that the T-Miter track
and runner area parallel to each other? Incra does this with an
aluminum channel that has both the runner and miter slot machined in it.


Put the runner on the bottom of a sheet of plywood. Make sure the plywood
extends past the blade of a table saw.and trim off the excess. Now you're
left with the edge of the plywood parallel to the runner and you can mark
for your miter slot based on this edge.

efgh wrote:
wrote in message
ps.com...
I want to make a miter sled similar to Incra's where you slip a miter
gauge into a miter track on the sled.

To do this, I need to attach a runner to a sheet of plywood. No
problem since it doesn't have to be exactly parallel to the ply. But
on the top of the sled where I plan to put a T-Miter slot it has to be
parallel to the runner in order for the miter gauge to be parallel (to
the blade) when it's installed. How do I ensure that the T-Miter track
and runner area parallel to each other? Incra does this with an
aluminum channel that has both the runner and miter slot machined in it.


Put the runner on the bottom of a sheet of plywood. Make sure the plywood
extends past the blade of a table saw.and trim off the excess. Now you're
left with the edge of the plywood parallel to the runner and you can mark
for your miter slot based on this edge.

And if you want it wider, make sure youre table saw fence is parallel
to the miter slot and use the fence as your reference.

--

FF

Ahhh..that makes sense...I just couldn't think for some reason.

Mount runner for miter slot, cut to length, flip and use cut edge on
fence to make dado for t-miter track.

Thanks for the help!!

wrote:
I want to make a miter sled similar to Incra's where you slip a miter
gauge into a miter track on the sled.

To do this, I need to attach a runner to a sheet of plywood. No
problem since it doesn't have to be exactly parallel to the ply. But
on the top of the sled where I plan to put a T-Miter slot it has to be
parallel to the runner in order for the miter gauge to be parallel (to
the blade) when it's installed. How do I ensure that the T-Miter track
and runner area parallel to each other? Incra does this with an
aluminum channel that has both the runner and miter slot machined in it.



http://www.geotekds.com/sled/index.htm

Thanks for posting the link below. Great easy to understand
instructions for building a sled.
jmk


http://www.geotekds.com/sled/index.htm