cutting angle in bandsaw?

[2manyrocks]

The blade wants to grab the angle at the top and then pull it upward and out of the grip of the vise.

Do I put the rectangle in the vice like this? (This photo was made from the backside of the saw with the motor being on the left. The other one was made from the front. )

 

[tommu56]

I ant got any pictures but at the fab shop I worked at we did it on its side
blade travels in this direction<-------------
I>>>>>>>>>>I---------< screw

stacking them and winding in the screw and doing multiple cuts at once.
production work.

power hack saw the same way

so when I do one its like this I>I---------- works fine for me

tom

 

[sandman2234]

Right from Ellis
Band Saw Blade FAQ's :: Support :: Ellis Mfg

Actually not quite what Ellis said, so how about I just post what they did say...


You should never have more than 24 teeth in the work or less than three. Six to 12 is optimum.

That is straight from Ellis....


David from jax

 

[sandman2234]

The blade wants to grab the angle at the top and then pull it upward and out of the grip of the vise.

Do I put the rectangle in the vice like this? (This photo was made from the backside of the saw with the motor being on the left. The other one was made from the front. )

I don't want to get into the rectangle discussion, but I did notice in the picture that the movable jaw on the saw appears to not be lying flat on the table. Tighten that up, as well as the non-moveable one and see if that helps. Also reduce the weight on the blade by adjusting the tensioner, which makes it cut a little slower also. I typically hold the saw up as I slowly feed it into the angle, until I have at least a quarter inch depth of cut going.
David from jax

 

[SPYDERLK]

How do you guys cut angle in your bandsaw? It seems to cut more square if I lay both sides down in the vice, but it wants to jump out of the vice unless I push down on it with a stick.

What's a better way?

Problem with that way is the under surface of the angle on the side to which the blade is travelling is at an angle that makes the "hook" of the blade teeth tend to catch. Same type of thing on sawing angle with the open side down on a vertical saw freehand table. The piece is very stable, but the blade wants to catch after it crosses the peak. In that case, cutting the 1st flange flat and then rotating the second flange down to the table as the blade gets to it works well. In the band- hack saw tho the metal stays in the same position thruout. Considering that downforce is constant there may be no really good solution. If the angle were oriented upright the cutting area would change hugely as you reached the bottom flange and downforce could use an increase. Probably would work OK in that position tho at whatever downforce was right for the upright flange and just add a little manually when it gets to the bottom one.
larry

 

[SPYDERLK]

The blade wants to grab the angle at the top and then pull it upward and out of the grip of the vise.

Do I put the rectangle in the vice like this? (This photo was made from the backside of the saw with the motor being on the left. The other one was made from the front. )

I think Soundguy meant to lay the angle upright and use a rectangle inside it that is larger than the bottom flange to give a good seating of the upright flange against the vise. The bottom flange wont be directly clamped -- only indirectly [because its attached to the upright flange].
larry

 

[2manyrocks]

sandman was absolutely right that one leg of the vice was too loose. I tightened it up and reduced the spring tension a bit.

I think I understand now. thanks much for all the help.

 

[Shield Arc]

Book says to position the material where the least amount of teeth are in contact.

Actually not quite what Ellis said, so how about I just post what they did say...


You should never have more than 24 teeth in the work or less than three. Six to 12 is optimum.

That is straight from Ellis....


David from jax

Judges? :laughing:

 

[Soundguy]

I think Soundguy meant to lay the angle upright and use a rectangle inside it that is larger than the bottom flange to give a good seating of the upright flange against the vise. The bottom flange wont be directly clamped -- only indirectly [because its attached to the upright flange].
larry

yep. i know it's not ideal.. but it works for me..


soundguy

 

[BXpanded]

Angle should be in the vise like this L The upright leg against the stationary side of the vise (toward the motor) The other leg flat on the table. It can't spin or tilt that way. The down pressure should be set correctly and should pretty much stay the same regardless of what's being cut. For instance, the correct down pressure on an Ellis 2000 is 8 pounds. You will likely need to restrict the speed with the hydraulics while cutting the thin vertical leg, but that will not affect the pressure on the horizontal leg.