[Rockhounds] 18 inch saw has a problem

[steve travis]

Put a magic marker in the vice and just touch ie mark the edge of the blade 
push the vice forward and that will tell you if you have a vice allignment 
prob if the mark gets wider or gets smooshed against the blade at the other 
side you have a prob but it can be solved. Steve
----- Original Message ----- 
From: "Kreigh Tomaszewski" <Kreigh at Tomaszewski.net>
To: "Rockhounds at drizzle.com: A mailing list for rock and gem collectors" 
<rockhounds at lists.drizzle.com>
Sent: Sunday, July 27, 2008 7:29 PM
Subject: Re: [Rockhounds] 18 inch saw has a problem


> The pictures got stripped off, but from your description it sounds like 
> the feed is not quite aligned with the blade. As the cut progresses the 
> blade is slightly dished from the misalignment and cuts a wider kerf as a 
> result.
>
> Put something in the vise that just contacts the blade as the cut starts, 
> and advance the feed to see where it is as the cut progresses.
>
> You might do better to put something into the vise that just contacts the 
> blade at the end of the feed, and back it up to the start to see how far 
> off the alignment is.
>
> A wide kerf can also be caused by having the feed not wuite at right 
> angles to the blade, so that the blade appears to wobble. Put something 
> into the vise that just touches the blade, and hand turn the blade to make 
> sure the contact is the same as the blade turns a full circle. Try it at 
> several spots along the feed.
>
> Minor misalignments have negative effect on big blades. If you use a 
> pencil as the something in the vise it leaves a nice mark on the blade to 
> show misalignment.
>
> Kreigh
>
>
>
>
>
> On Sunday, Jul 27, 2008, at 20:45 America/Detroit, 
> <rockhounds at adelphia.net> wrote:
>
>> MY OLD 18 inch saw stripped the shaft a while back. Had it 
>> welded/repaired and now finally got it back together. When I cut a rock 
>> now the saw has a gap of about 3/8 of an  inch at the end of the cut  yet 
>> is still in contact with the blade at the point the cut started.
>> At one point the whole delivery system was taken apart.
>> The saw is similar to the old convington type of design with the screw 
>> and saw powered by one motor.
>> The blade looks to be true.
>> Any ideas on the problem?
>> I attached 2 photos
>>
>>
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