Lead In/Out help

[zayne19]

Hello,

I have a basic picture attached, but when I make a project, I am having this blown out spot from when the cut initially starts. I think that is the Lead In. How do I keep this from happening?

Thanks for the help!

[poplarhillmetalworks]

Can you adjust your lead ins prior to cutting? I use Flashcut and can adjust prior to sending to CNC to cut

[zayne19]

Yes, we use SheetCam TNG. I can adjust any aspect. I just didn't know what to adjust it to to get it to stop.

[acourtjester]

in SheetCam you can adjust the length of the lead in and out and also make the pierce delay as short as the metal thickness will allow.

lead in 2.JPG (52.46 KiB) Viewed 484 times

[weldguy]

If the blown out spot is bothering you then it is likley because you are seeing it on your finished piece which leads me to believe you are not actually using a Lead In but rather piercing directly on what is to be your finished line.

In the example below, we have no lead in on the left so the torch will pierce in the corner and blow out a spot, on the right we have a lead in so the blown out spot will be in the waste where no one cares.

Are you using lead in's or just have terminology incorrect?

[zayne19]

If the blown out spot is bothering you then it is likley because you are seeing it on your finished piece which leads me to believe you are not actually using a Lead In but rather piercing directly on what is to be your finished line.

In the example below, we have no lead in on the left so the torch will pierce in the corner and blow out a spot, on the right we have a lead in so the blown out spot will be in the waste where no one cares.

Are you using lead in's or just have terminology incorrect?

Yes I am using a Lead In. So to keep that small spot from cutting or being seen outside of my cutline, I need to set it to no Lead in?

[zayne19]

Here is a picture of a small donation sign we cut in class. If you zoom in, you can see the small blown out spots on the corners where it would start the cuts. I had a lead in of .2 and I believe the lead out was 0. Any recommendations on changes?

[acourtjester]

You can see and move locations of start lead in and outs. You need to have enough length for the lead in/out for inside cuts for them to happen.

[adbuch]

[weldguy]

Yes I am using a Lead In. So to keep that small spot from cutting or being seen outside of my cutline, I need to set it to no Lead in?

No, you want to use a lead in. If you are able to place the lead in wherever you want you can be selective where you place it. In the image below I show your lead ins in green and my choice of lead in location in red. You can see mine will flow into the part rather thank make an abrupt direction change. Also I don;t like using lead outs on thin material but maybe that's just me.

[zayne19]

Here is another example of a sign we recently cut and a picture of what my SheetCam page tells me about Lead Ins and Outs. I have no idea as to what it should be set to to keep the small cut in dots from occurring when it starts its cut.

[TJS]

So Inside the "M", "H" and inside the animal (legs and stomach) you should be performing an inside offset with lead ins on its own layer (remember counter clockwise on inside cuts), call it "Inside" for the layer. Then for outside cut use Outside Offset with also a lead in, call that layer (Outside). I usually don't use lead outs on these but you might want to test it.

[Dirtmotor]

I would think you need to make a inside layer looks like your cutting is set to no offset

[ben de lappe]

While I haven't used sheetcam in ages from what I remember there are settings for inside offset and outside offset. Your cuts appears to be an outside offset applied to an interior cut hence the lead in's/outs being on the wrong side of the line.

This is a cut pic sent by a client who wondered what was wrong with the drawing. Come to find out nothing, the offsets used were incorrect.