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PostPosted: Thu Jan 11, 2018 3:53 pm 
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I have purchased a Ryobi table saw. Generally pleased with it however the riving knife is slightly off centre so when ripping down using the fence it tends to bind a little. I cannot see how to recentre. Any help please.

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PostPosted: Thu Jan 11, 2018 3:59 pm 
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Riving knives are generally mounted onto a block using a bolt and washers. They can sometimes ger slightly bent or move in which case undo the securing bolt or bolts and use scissor-cut paper or thin card packers to change the alignment slightly

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PostPosted: Thu Jan 11, 2018 4:00 pm 
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On my saw I have never had the riving knife on as it gets in the way. I tend to use wedges when I rip and just slip them in as I go along to avoid blade pinch. Of course I would not recommend anyone to do this as it is my choice not to have the knife in place. On my saw when you remove the blade slot cover you should see the riving knife attached to a tab. If you tap this with a hammer or put a lever on it you should be able to align it properly.

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PostPosted: Thu Jan 11, 2018 4:18 pm 
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have you checked the blade and fence are parallel??
also worth checking if the knife is bent [has a lean ]
as the riving knife needs to be exactly in line in all directions and within about 5mm off the blade to work properly

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PostPosted: Thu Jan 11, 2018 8:53 pm 
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dewaltdisney wrote:
On my saw I have never had the riving knife on as it gets in the way. I tend to use wedges when I rip and just slip them in as I go along to avoid blade pinch.

How on earth do you hold the crown guard, then?

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PostPosted: Thu Jan 11, 2018 9:38 pm 
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On my saw, the knife has thin metal shims between it and the thing it mounts to, to nudge it into line with the blade.

Some cut up coke can would probably do

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PostPosted: Thu Jan 11, 2018 10:17 pm 
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Job and Knock wrote:
dewaltdisney wrote:
On my saw I have never had the riving knife on as it gets in the way. I tend to use wedges when I rip and just slip them in as I go along to avoid blade pinch.

How on earth do you hold the crown guard, then?


It floats magically above

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PostPosted: Thu Jan 11, 2018 10:20 pm 
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:roll: :shock: :lol: :lol: :lol:

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PostPosted: Fri Jan 12, 2018 3:22 pm 
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The fence is OK I have a picture which explains better I would say the knife is in the right place and the saw is slightly out. If I put a straight edge along from the knife to the leading edge of the blade the trailing edge of the blade has a gap. How do I post a photo?


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PostPosted: Thu Jan 18, 2018 2:37 pm 
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Attachment:
20180112_124717%5b1%5d2.jpg
20180112_124717%5b1%5d2.jpg [ 190.25 KiB | Viewed 735 times ]
I have worked out how to add the photo now.


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PostPosted: Thu Jan 18, 2018 4:11 pm 
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ok other checks
have you changed the blade ??
if so was it exactly the same size kerf as in 3.17mm to 3.17mm not 2.5mm for example
was the bore and blade size the same
how does the rules sit on the other side ??
looking at the blade dead on from the front does the combined riving knife and crown gaurd support line up nicely with the blade??
take the blade out and check every thing is clean and well seated

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PostPosted: Thu Jan 18, 2018 6:19 pm 
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ok other checks
have you changed the blade ?? No, saw in nearly new
if so was it exactly the same size kerf as in 3.17mm to 3.17mm not 2.5mm for example
was the bore and blade size the same See above original
how does the rules sit on the other side ?? Will check and come back
looking at the blade dead on from the front does the combined riving knife and crown gaurd support line up nicely with the blade??
take the blade out and check every thing is clean and well seated Will do

Thanks for the input on this and the sliding mitre saw thread. I will come back to you. Also waiting on a response from the suppliers.


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PostPosted: Thu Jan 18, 2018 6:34 pm 
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the riving knife it a fraction bigger than the blade so it should push off the blade but only about a paper or twos width each side to "encourage "not to close up on the blade or cut on the back off the blade

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PostPosted: Thu Jan 18, 2018 6:36 pm 
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Are you absolutely sure there's no way to move / adjust it?
What does the manual say?
Being that far out, it's either out of adjustment, or it's been assembled without a spacer or something I'd have thought.


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PostPosted: Thu Jan 18, 2018 6:45 pm 
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I could shim it to the right but that is the wrong way, the plate it is mounted on is fixed. Instructions are crap! Waiting for a response from the suppliers before I try anything else.


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