I use a Freud FT2000E router in a table, and have noticed recently that
there seems to be a small amount of run-out in the cutter rotation. I am
having some difficulty working out where this is coming from...

If I use a DTI on the actual router output shaft, its less than 0.03mm.
Much the same for inside the shaft as best I can measure. However stick
an end baring cutter in it, and the run out at the bearing is around
0.3mm and visible to the eye. Changing the length of protruding cutter
from say 35 to 55mm clear of the collet nut, does not actually seem to
make it any worse. Just placing the cutter in the collet - even without
tightening the nut seems to introduce the eccentricity.

So it looks like the collet itself is causing the problem. I have done
all the usual things; cleaned and inspected it and visually it looks ok.
If you rotate the collet on the shaft of a bit there is no visible
error, and a DTI on the outside of the collet shows none either. So its
only when in the shaft that you can see it...

What else can I try?


--
Cheers,

John.

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In message , John
Rumm writes
So it looks like the collet itself is causing the problem. I have done
all the usual things; cleaned and inspected it and visually it looks
ok. If you rotate the collet on the shaft of a bit there is no visible
error, and a DTI on the outside of the collet shows none either. So its
only when in the shaft that you can see it...

What else can I try?

Throw the collet away?

Perhaps, during previous work, the shaft has slipped causing wear to one
jaw more than the others? Poor quality control during collet manufacture
leading to improper hardening?

I don't do much routing but find re-tightening necessary after a few
cuts.

regards

--
Tim Lamb

On 05/10/2011 08:17, Tim Lamb wrote:
In message , John
Rumm writes
So it looks like the collet itself is causing the problem. I have done
all the usual things; cleaned and inspected it and visually it looks
ok. If you rotate the collet on the shaft of a bit there is no visible
error, and a DTI on the outside of the collet shows none either. So
its only when in the shaft that you can see it...

What else can I try?

Throw the collet away?

That may well be the required solution, but since they are about £25 a
pop I thought I would check there is nothing obvious first!

This looks like the beastie:

http://www.mtmc.co.uk/Freud-Router-C...580-37313.aspx

Perhaps, during previous work, the shaft has slipped causing wear to one
jaw more than the others? Poor quality control during collet manufacture
leading to improper hardening?

Perhaps, although I thought I would have seen that when rotating the
collet on the shaft of a cutter (with the cutter held firmly). Perhaps I
should check at several places on the taper and see if that has worn
unevenly somehow.

I don't do much routing but find re-tightening necessary after a few cuts.

This one seems to get a pretty good grip and hang on to it.


--
Cheers,

John.

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

On 05/10/2011 20:03, Tim Lamb wrote:
In message , John
Rumm writes
On 05/10/2011 08:17, Tim Lamb wrote:
In message , John
Rumm writes
So it looks like the collet itself is causing the problem. I have done
all the usual things; cleaned and inspected it and visually it looks
ok. If you rotate the collet on the shaft of a bit there is no visible
error, and a DTI on the outside of the collet shows none either. So
its only when in the shaft that you can see it...

What else can I try?

Throw the collet away?

That may well be the required solution, but since they are about £25 a
pop I thought I would check there is nothing obvious first!

This looks like the beastie:

http://www.mtmc.co.uk/Freud-Router-C...lacement-Route
r-Collet__p-12732580-37313.aspx

Bit more manufacturing work there than I had imagined.

Perhaps, during previous work, the shaft has slipped causing wear to one
jaw more than the others? Poor quality control during collet manufacture
leading to improper hardening?

Perhaps, although I thought I would have seen that when rotating the
collet on the shaft of a cutter (with the cutter held firmly). Perhaps
I should check at several places on the taper and see if that has worn
unevenly somehow.

I don't do much routing but find re-tightening necessary after a few
cuts.

This one seems to get a pretty good grip and hang on to it.

My last job was cutting those window rebates. 45mm depth using a 1/2"
shaft straight fluted work top cutter. I wondered why the depth of cut
changed and then realised the cutter needed further tightening:-(

Reminds me of my very first B&D "Woodworker" router... the depth lock
was feeble and the plunge spring fearsome, so you frequently ended up
with tapering depth cuts!

I suppose dropping a router on its nose might produce some interesting
effects.

Indeed - although quite hard to do with a plunger router, unless its got
a worktop length cutter in it.

--
Cheers,

John.

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