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post #1 of 13 (permalink) Old 01-13-2008, 08:15 PM Thread Starter
 
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Default base plate not centered

im a new member to this forum.nice meeting everybody.ive been checking out some of the posts to see if i could find the answer to a problem i noticed while trying to cut some through mortises in some 1 3\4 inch heart pine.i can only make half the cut in one side and i have to flip the piece over and finish the mortise from the other side.well the cuts are not lining up.i noticed that the bit is not centered with the base.

what do i do about this?
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post #2 of 13 (permalink) Old 01-13-2008, 08:43 PM
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Hi paulleveille

You can get a longer bit
http://cgi.ebay.com/1-pc-1-2-SH-3-Bl...QQcmdZViewItem

http://cgi.ebay.com/1-pc-1-4-SH-2-1-...QQcmdZViewItem

Or you can take the time to reline the base plate on the router...

Make a center plug for your router with a hole saw or with your band saw,almost all hole saws put in a 1/4" hole in the center ,,, once you have the plug made chuck up a 1/4" router bit and then release the 3 or 4 screws holding to the base of the router, then push the base down over the bit and then re-tighten the screws ...

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Quote:
Originally Posted by paulleveille
im a new member to this forum.nice meeting everybody.ive been checking out some of the posts to see if i could find the answer to a problem i noticed while trying to cut some through mortises in some 1 3\4 inch heart pine.i can only make half the cut in one side and i have to flip the piece over and finish the mortise from the other side.well the cuts are not lining up.i noticed that the bit is not centered with the base.

what do i do about this?



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post #3 of 13 (permalink) Old 01-13-2008, 08:52 PM
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Welcome to the forums Paulleville! You can buy a centering jig from Woodcraft or Rockler. Just be sure to get the one for your type router. Or, if you have a set of bushings for your router you can simply remove the base plate, put the 1/4" ID bushing on the base plate and insert a 1/4" rod or bit in the router. Then all you have to do is slip the plate with the bushing on over the rod/bit and re-attach the base plate. The plate should then be centered on the router.

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post #4 of 13 (permalink) Old 01-13-2008, 08:53 PM
 
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Default Centering the bit

Quote:
Originally Posted by paulleveille
im a new member to this forum.nice meeting everybody.ive been checking out some of the posts to see if i could find the answer to a problem i noticed while trying to cut some through mortises in some 1 3\4 inch heart pine.i can only make half the cut in one side and i have to flip the piece over and finish the mortise from the other side.well the cuts are not lining up.i noticed that the bit is not centered with the base.
what do i do about this?
Hello Paul, if the router came with a centering pin fixture, you chuck it up, mount a guide bushing, loosen the base plate, lower the router to gently mate the alignment pin with the smallest guide bushing. center the pin and tighten the base plate. This is assuming that the centering is off slightly. If you don't have an alignment pin, you can try a bit and bushing combination that will center the base plate.

If the centering is WAY off, additional information might be obtained by doing a search on this site for more information elsewhere. Hope this is of some help.
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post #5 of 13 (permalink) Old 01-13-2008, 09:55 PM Thread Starter
 
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Thanks for the responce guys !Will the self centering screws cause a problem with this centering jig?
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post #6 of 13 (permalink) Old 01-13-2008, 10:10 PM
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Hi paulleveille

They may and if so just drill the holes out by just a little bit,,,
Then you can move it around and line it up..


==========
Quote:
Originally Posted by paulleveille
Thanks for the responce guys !Will the self centering screws cause a problem with this centering jig?



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post #7 of 13 (permalink) Old 01-13-2008, 10:14 PM Thread Starter
 
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how about a countersinking with some flat screws?
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post #8 of 13 (permalink) Old 01-13-2008, 10:36 PM
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Hi

Some routers come with round counter sunk holes some come with 82deg. counter sunk holes,,, both type work well...the flat hd. 82 deg. ones do like to pull the plate over to one side or the other... trying to seat the screw in the counter sink hole...

If you now have the flat head ones 82 deg. you can made some parts out of dowel rod and put in a counter sunk hole in them and drill out the plate to the round counter sunk type this will let you move the plate over to the right spot...

NOTE*** I have used hvy.wall Alum. stand offs (ALum.tubing) to make the spacers in place of the wood dowels they work very well also...a bit tricky to cut off a small part, but not to bad on the band saw , but you must counter sink the stand off 1st..


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Last edited by bobj3; 01-13-2008 at 11:28 PM.
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post #9 of 13 (permalink) Old 01-13-2008, 11:06 PM Thread Starter
 
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going to go to machine shop buddy tommorow and get him to put some flat countersinks in screw holes so i can put some flathead screws in.and if i need more room for movement i will drill the holes a little bigger.centering jig will make alignment easy.hopefully he will have time to make jig too.

seems like a decent router shouldnt have this problem.should have been checked at assembly.by porter cable.


thanks for the help guys .would have took couple days to figure this out.lots of head scratching.

THANKS
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post #10 of 13 (permalink) Old 01-13-2008, 11:36 PM
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Welcome to the forums Paul.




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