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29th March 2014, 01:24 PM #1Awaiting Email Confirmation
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fret slotting - cheapo table saw.
Hi.
I bought a new GMC table saw to dedicate to fret slotting using a sled, but find that the mitre tracks are out of parallel with the plane of the blade by 1.55mm over the width of the fully extended saw blade.
I cannot see an adjustment mechanism on the saw.
By grinding a removeable panel which has a track in it, I can get the difference to under 1mm.
Given that the blade protrusion will be about 0.150" giving a short cutting length in the fingerboard will that get the job done? Is there a way to get a handle on the resulting width of the slot? - like will it be 0.023" plus the error?
Does anyone know thw 'proper' adjustment process? Is it a lost cause?
Regatrds,
Rob.
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29th March 2014 01:24 PM # ADSGoogle Adsense Advertisement
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29th March 2014, 01:59 PM #2GOLD MEMBER
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You really can't afford to be out at all with fret slotting. No idea how to fix your problem but i certainly wouldn't use it that way
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29th March 2014, 03:05 PM #3
GMC is a lost cause
The person who never made a mistake never made anything
Cheers
Ray
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29th March 2014, 03:19 PM #4Senior Member
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My Makita MLT100 is exactly the same. Really dissapointed. I'm going to pull mine apart and see if the motor can be shimmed into alignment.
Danny
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29th March 2014, 05:48 PM #5Awaiting Email Confirmation
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actually I took another tack this afternoon and drilled out some of the holes to which two of the top panels attach & got enough wiggle room to get things aligned - but- i need another threaded spring clip - dunno where i'll get it!!
I had the idea that if you weren't properly aligned you got a slightly wider slot. Maybe that's wrong but even so i think how wide is the question.
Lots of scrap used this weekend.
I'm sorry to hear about the Makita - I knew could write off $90.00 in the scheme of things so am not too cheesed off...but I would expect a Makita to be dead on.
Can you return it on the grounds that it doesn't do the jobs as advertised?
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30th March 2014, 01:41 AM #6SENIOR MEMBER
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30th March 2014, 11:41 AM #7
You can also build the sled to ride the outside edges of the table. They would want to be parallel to the blade for this to work also. On machines with small guide slots this is often the better way.
Regards
John
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30th March 2014, 04:43 PM #8Awaiting Email Confirmation
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that's a good thought...the edge on the panel containg the track that's tue is also true so i can use sliders in in the track and on the edge. It should work!!
So to test it would i just cut some slots and measure them and make comparisons to the published data for the scale lenght?
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30th March 2014, 04:55 PM #9GOLD MEMBER
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Search fret slotting saw on this forum. Stu from Bluestone Guitars done a thread on his table saw that was fantastic
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30th March 2014, 08:29 PM #10Senior Member
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Great to hear you may have a solution. My Makita was brand new but due to a number of factors I didn't get it set up for a couple of years and didn't realise the table was out until 3 years after purchase. The whole table is out so I reckon removing and refitting the motor may fix it. Otherwise I might out new slots in the bench it sits in. These could be aligned to the blade.
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30th March 2014, 11:47 PM #11Awaiting Email Confirmation
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Thanks. Got it here if others are interested:
https://www.woodworkforums.com/showth...=fret+slotting
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3rd April 2014, 12:22 PM #12Awaiting Email Confirmation
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"A simple method of getting the blade parrallel with the sliders and fence is to use a mitre square against the fence and then slide the fence forward.
You want to see the square's edge against the saw's blade maintaining the same gap all along the travel distance. If this gap alters, then you've got run-out."
Just asking the general consensus..I've been seeing videos of the 5 cut method to get within a few thousandths of inch to square.
For fret work is eyeballing it with a square witnin reasonable limits?
What do people think?
But ah what exactlt is a mitre square gauge?
Thanks,
Rob.
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11th April 2014, 06:18 PM #13Awaiting Email Confirmation
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after doing a five cut process I have the error at .0019" out of square per inch of cut.
Is that in the fret slot cutting ballpark?
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25th April 2014, 11:21 PM #14Alumnus of Wood and Strings
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You might want to have a peek at my method
https://www.youtube.com/watch?v=wz7mfvTbpKg
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26th April 2014, 11:57 AM #15
I like the look of the bandsaw method. Is it a special fret cutting blade or just an off the shelf blade that comes close to the kerf size required?
So far I am using a steel rule, square, marking knife and a handsaw and getting ok results but it is a slow job.
Regards
John
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