If you've been flicking off yer offcuts on a slider....

[TomTrees]

Seen this video yesterday, it seems fair warning to those who wish to crosscut with a circular saw.

Here's the youtube link

I took a sequence of screenshots for those who don't click on youtube's.

What way would you make this cut, if you had to do a lot of them, and didn't have a compound mitre saw?

Would you make a crosscut sled/buy a jig to enable one to clamp the offcut?




Had a gloss through the BGHM training manual,
(now since translated to English here)
https://groups.io/g/felderownersgroup/files/Articles & Reviews/Woodworking_Machines English.pdf

to see if I missed something, though seems the only thing for such a job was an magnetic offcut deflector,
on page 21.

 

[toolsntat]

Would I be too harsh and judgemental to say this looks very much like a calculated set up?
Locking off the guard has very little to do with this video.
Why was the riving knife removed to allow the piece to make contact with the saw blade?
Cheers Andy

 

[AndyP]

Why would you not switch off the saw before removing the offcut?

 

[TomTrees]

Good spot Andy, I missed that as I presumed nobody would be using such a machine without
the riving knife.
Truth be told, I was zoned in on the guard, as I've never seen one, (well, not one of those types anyway)
"perform" as it were, before.
I was under the impression they had no such function.
Perhaps it were such an advert/clickbaiting, I mean why would one go to the trouble of setting up a camera,
and not install the RK?

Be interested on folks thoughts on the polycarbonate/Lexan ect clear shatterproof guard,
and whether one reckons this video proves that it's an unsuitable material?

Cheers
Tom

 

[TomTrees]

Why would you not switch off the saw before removing the offcut?

I did screenshot the hitting of the switch, and mentioned this, but my text disappeared.
The blade was coasting to a stop when this incident happened.
Makes a good case for seeing how fast my cheapo VFD can stop a 12" blade!.

Tom

 

[HdV]

That's what Aigner designed their "Abweiser" for. Of course, it is not too much of a bother to make something like that yourself. You'll need a magnetic table though. I often cringe when looking at Youtube videos. It seems like safety is mostly a thing for the lawyers, because in practise unsafe working habits seem to be the norm. Unless they enjoy working unsafely just to make what they think are better videos?

 

[HdV]

Not all saws have a proper brake. Waiting for the blade to stop spinning seems to be too much of a bother for many people.

 

[TomTrees]

That's what Aigner designed their "Abweiser" for. Of course, it is not too much of a bother to make something like that yourself. You'll need a magnetic table though. I often cringe when looking at Youtube videos. It seems like safety is mostly a thing for the lawyers, because in practise unsafe working habits seem to be the norm. Unless they enjoy working unsafely just to make what they think are better videos?

Aye that's the same deflector as per in the guide.

Not all saws have a proper brake. Waiting for the blade to stop spinning seems to be too much of a bother for many people.

Thanks to Bob Minchin (9fingers) for the induction motor PDF document, I've got the choice.

I was assuming a compressed air system hold down clamp, as seen on these type machines would be an available
attachment for crosscutting.
Not gone looking, but doesn't seem to be very common if such examples exist.

Tom

 

[Mike]

I have a similar overhead guard for my SCM saw, but removed it because the bracket attaches to the outfeed side and restricts the size of material that can be cut. I now use the standard overhead guard that attaches to the riving knife.

The SCM overhead guard kit comes with two riving knives and two perspex shields (one to accommodate blade tilt), and I noticed immediately the riving knife on this Felder saw was missing. Every Felder, Altendorf, Martin, and SCM saw I've seen in professional shops have riving knives attached, so I assume the knife in this video was removed for reasons that are not clear to me.

For repeated cuts of material that size, I would definately use my SCMS instead of the table saw.

 

[AndyP]

I did screenshot the hitting of the switch, and mentioned this, but my text disappeared.
The blade was coasting to a stop when this incident happened.
Makes a good case for seeing how fast my cheapo VFD can stop a 12" blade!.

Tom

sorry I did not spot that. Then my question would be. Why would you not wait until the blade has stopped before removing the off cut?

Simple operator error in my book.

 

[HdV]

I was assuming a compressed air system hold down clamp, as seen on these type machines would be an available
attachment for crosscutting.
Not gone looking, but doesn't seem to be very common if such examples exist.

Airclamps are quite common on sliders, but very expensive. I have never seen them other than for the sliding table. That is, on the left side of the blade, where they can move together with the workpiece. On the right side of the blade they would be too bulky and in the way. That's why an Abweiser is much more popular. It is simpler, cheaper and good enough. If you don't have a magnetic table on the right side of the blade, then chances are there's a T-groove you can use to clamp an Abweiser.

 

[AJB Temple]

Strikes me as unlikely in a pro shop that can afford good machinery, that a good big cross cut mitre saw would not be available. Pretty much every table saw I have ever seen has a riving knife fitted and in most cases it's extra work to remove them so why would you do so unless you are set up especially for grooving?