On 10/11/2018 01:25, wrote:
On Friday, 9 November 2018 17:09:22 UTC, John Rumm wrote:
On 09/11/2018 12:55, tabbypurr wrote:
On Friday, 9 November 2018 12:34:41 UTC, John Rumm wrote:

Take one reciprocating saw, and a medium length old blade, plus a
block of wood say 6" x 3" x 1/2".

Use the saw to cut a kerf into the middle of the wide surface of
the block, and then epoxy the *back* of the blade into that kerf to
that it is held at a slight angle to the blade. Pop the blade in
the saw, and you now have a linear{1] reciprocating sanding block.
A bit like:

http://wiki.diyfaq.org.uk/index.php/...dingLashup.png


[1] Because of the slight angle there will be a component of
verticle movement as well - so you will get a bit of vibration...

you won't get a bit of vibration from that picture you'll get failure
to contact 90% of the time. That can be greatly improved by the block
being at 90 degrees to the blade so the blade bends sideways every
stroke. Even better, mount it properly so no bending is required.

Having not tried, I don't know if it will be an issue. You could also
round the face of the sanding block slightly to ensure that there is
always a (moving) point of contact.

that certainly won't work. Look at the direction of the blade movement.

That certainly *would* work... think about it.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/