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Forum topic by sonnyr posted 10-10-2012 02:04 AM 799 views 0 times favorited 7 replies Add to Favorites Watch
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sonnyr

90 posts in 882 days


10-10-2012 02:04 AM

Topic tags/keywords: router 690lr porter cable

I purchased a Porter Cable 690LR router a couple of months ago and finally got around to usng it on a project. I used it to route out a 4”x6” x 1/4” place on a lid for a trinket box. I am “helping” my 10 year old grandson make something for his mother. He wants to mount a picture (inset) on the lid of a trinket box. The problem that I am having is that the depth of cut will not stay constant. It keeps changing as I route. I checked it once and it had deepened, I checked it another time and it was shallow. I tightened the nut for the clamp and it seemed to stay put. Any ideas what I could be doing wrong. Is the motor not on the base correctly? Any help would be greatly appreciated

-- I may be slow, but I'm easy to stop!!!


7 replies so far

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TheDane

3994 posts in 2416 days


#1 posted 10-10-2012 02:22 AM

sonnyr—This happened to me with an older PC 690 in the wood shop at the local TC … turned out there was some debris in the base that kept me from getting a good solid bite and the vibration while routing was enough to allow it to creep.

Check the motor and base, then check the collett and make sure the bit isn’t moving on you.

—Gerry

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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NiteWalker

2710 posts in 1330 days


#2 posted 10-10-2012 02:33 AM

I have 3 690’s and haven’t had this issue; all are made in mexico models.

The lever clamp was one of my first suggestions; my dewalt 618 plunge base was having an issue with the router motor shifting in use until I tightened the lever clamp nut.

The other thing it may be is the bit in the collet. Make sure you’re not bottoming it out; this can cause the router bit to shift height in use. The proper way to handle it is to insert the bit and pull it up about 1/8” so it doesn’t bottom out when tightening.

-- He who dies with the most tools... dies with the emptiest wallet.

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sonnyr

90 posts in 882 days


#3 posted 10-11-2012 12:06 PM

Thanks for your responses, it was a rookie move on my part. I forgot to check the the collett to make sure the bit was tightened. Thanks again, you guys are the best.

-- I may be slow, but I'm easy to stop!!!

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MonteCristo

2098 posts in 942 days


#4 posted 10-11-2012 06:05 PM

Do you have the cam clamp type of lock ? I hate this style as it’s too easy for it to be set to not cam hard enough. I replaced it on my 690LR with a knob and have had good results since.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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NiteWalker

2710 posts in 1330 days


#5 posted 10-11-2012 07:16 PM

Monte, it’s easy enough to adjust the pressure of the cam so it locks securely.
I haven’t had to do it to any of my 690’s and only once to my dewalt 6182 plunge bases in 5 years.

Sonny, glad you got it figured out.
I find it easier to change bits on the 690 with it on its side.

-- He who dies with the most tools... dies with the emptiest wallet.

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sonnyr

90 posts in 882 days


#6 posted 10-12-2012 03:05 AM

Monte, I have the clamp type lock. I tightened the nut for the clamp. Now it is a little hard to engage but I am confident that for now it will not let the depth change.
Thanks all for your support.

-- I may be slow, but I'm easy to stop!!!

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oldnovice

3872 posts in 2121 days


#7 posted 10-12-2012 03:52 AM

I haven’t had that problem with either of my PC router but I did with my old Craftsman, which in this case was the clamp nut wasn’t holding. There was no easy fix for this 30+ year old router (no parts available) that’s why I bought the PC routers.

-- "I never met a board I didn't like!"

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