I can’t figure this one out. I am cutting wide boards on my chopsaw – DW705 Type 6 – and noticed only one side of the cut board is square. Meaning – It only cuts square on one fence side.
So, fence must be out of wack, right? Wong! Both sides of fence are on the same plane.
Took my 2′ level – Stabila – and the fence is in proper allignment. Even double-checked with the srtaight edge of a new roofers square. Dead on! I then checked the fence at a higher point. Properly aligned there also. Not even a paper thin gap!
I re-squared the blade but problem still exists.
What am I missing? Very weird.
Frankie
There he goes—one of God’s own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die. —Hunter S. Thompson from Fear And Loathing In Las Vegas
Replies
>> What am I missing?
Glasses?
: )
+++++++++++++++++++++++++++++++++++++
"Doubt is not a pleasant condition, but certainty is absurd." Voltaire
Is the piece that's not square being held securely against its fence during the cut? If not, could that piece possibly be moving slightly as a reaction to the spinning blade?
Tejonista in Orange County, Calif.
Piece is held securely.Power disconnected. Just using a Starret square and/ or a japanese one. One side of blade is perfectly square to fence. The other side isn't.Both squares are square.I am stumped.Frankie
There he goes—one of God's own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die.
—Hunter S. Thompson
from Fear And Loathing In Las Vegas
Just to isolate some variables, remove the blade, bolt it in backwards, and see what your squaring shows.
How is your arbor bearing?
Forrest
I'll try this too.I am assuming I should do this with the power off, right? LOL!F
There he goes—one of God's own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die.
—Hunter S. Thompson
from Fear And Loathing In Las Vegas
the arbor is not perpendicular to the fence?
can you take a wide piece and chop the blade into the center of it and analyse the kerf?
What will the kerf tell me that a cut doesn't?I will try it though.If the arbor IS out of whack, wouldn't it have an effect on BOTH sides of the fence?F
There he goes—one of God's own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die.
—Hunter S. Thompson
from Fear And Loathing In Las Vegas
The arbor bearing is one of the weak points in a DW 705.. I've replaced twice now, Seems like it make blade wobble from correct position on left to wards the motror. I know this sounds irrational, but it will =give me a clean square cut on left but a ragged mess on motor side
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
If (ha!) I need to replace the arbor, is that a DW Service center job or can I do it without special tools?Any idea what an arbor costs?I'll be going to the DW service center this week anyway to pick up a repair kit- gaskets, screws, springs, filter - for my Emglo compressor. First time in 18 years! Doing it as a prevention. Works fine but it is overdue - ha! It's a workhorse.Thanks for your help.Frankie
There he goes—one of God's own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die.
—Hunter S. Thompson
from Fear And Loathing In Las Vegas
I called and bitched about the arbor nut on my tablesaw exploding on me, and while I had him bent over, he asked if there was anything else he could do for me - aso he sent a couple bearing rings for free.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
how or why did the arbor nut on your TS explode?
that seems like an event I would not soon like to see happen
That was the subject of a long conversation between he and I that I have reported here before, but years ago.The engineering guys and the marketing guys at DW don't exactly see eye to eye, is the impression I came away with. Marketing people wanting to be first to maket with new developments to secure market share - and a "We can fix that later" attitude about quality of product.The threading on the arbor needs to have a certain camber to it to hold the arbor nut at the same toprque you install it at. if wrong, it will let the nut get looser or tighter in use, depending which way it is off.I bought one of the earliest DW TS to market. They may have refined this by then, but they also use low quality metals on some of their parts. So the first time I changed blades, after a few weeks, the threading stripped right off the arbor. It went back to the service shop for a change out. Came home with a whole new motor assembly mounted on it. 'course, I had to re-align everything.A couple years later, I went to rip a 2x8 omne morning and flipped the switch on, and the arbor nut exploded into five pieces. Some went out the ejection port, one went straight up to hit the plate, and a couple stayed in the dust shroud. I was on the phone for a couple hours before I got somebody who could have the authority to satisfy me, and not just a phone monkey. he was from engineering and I won't directly say that he said any of this, but I m,anaged to pull enopugh out of him to know that it's all true. He sent a new blade, new nut, and the bearings for the chopsaw. Free, and he sent a pachage to return the damaged nut back to him for testing in their labs. He was fairly sure that the poorly desighned camber on the threading was such that it allowed the nut to constantly get tighter and tighter on the arbour, untill there was too much torque, cuasing both the original thread stripping and the latter nut disintegration. He had seen similar four or five times prior. We're working on it, I believe is what he said...
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Not the arbour, but a bearing or bushing it rides in. It's been a couple of years, but I don't remember it as being a hard job.And I hate mechanical work like that, so....
I probablyu blank out the details because it's one of those things I hate to deal with. Plumbing and mechanical - gauranteed to get me in a mood
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Kerf analysed.Fence side 1/16 + 1/64.End of cut, farthest away from fence 1/16 + 3/64.From above, cut looks clean.Sighting down the cut, cut is ragged, - as Piffin suggested.Cut is perfectly square on left side.Cut is out of square by over 1/16" on right side (motor side). This does not match up with the kerf size variation, but I am better understanding what is happening.If (ha!) I need to replace the arbor, is that a DW Service center job or can I do it without special tools?Anyone? Beuller? Anyone?F
There he goes—one of God's own prototypes—a high powered mutant of some kind never even considered for mass production. Too weird to live and too rare to die.
—Hunter S. Thompson
from Fear And Loathing In Las Vegas
If (ha!) I need to replace the arbor,...
I don't think the arbor itself is the issue - think bearings - I'm not familiar with this particular model, but I'd investigate how the power head is secured to the carriage, looking for something that has loose/shifted that could cause one edge of the blade to lead the other -
"there's enough for everyone"
>> What am I missing?
A Hitachi?
Nah, a Bosch. GDand R..
Spheramid Enterprises Architectural Woodworks
There is no cure for stupid. R. White.
"A Bosch"----- Now that's funny
SNARK!!!!!!!!
"No doubt exists that all women are crazy; it's only a question of degree." - W.C. Fields
Edited 6/12/2006 8:41 am ET by jet
Bent blade? Had one on a saw once and couldnt tell until we did the kerf test and the kerf was 1/4" wide.
Possibly if the blade is bent in one direction (to the right for example) it may show a straight cut on the left side but bad on the right.
Phew, nice to know I'm not crazy! My DW708 has started doing this as well. Square when fed from the left, not square fed from the right. Fence is dead straight. Freshly sharpened Forrest Chopmaster didn't make a difference. I have been cutting a lot of maple...
Sounds like Piffin has the answer. I'm between projects, maybe it's time to rebuild the arbor on the TS while I'm at it - has just enough wobble to be anoying.