Testing some settings on my chuck rotary since a local jeweler has asked me to engrave some rings for them. With the rotary homed, and my artwork where I need it, the rotary spins a little on start up. I was testing a straight line, so my thought the rotary would spin at all when I click start, but it does. Is there a setting that controls this, or is it standard behavior, or am I doing something wrong?
The rotary is on the X axes… when you draw a line that goes along the X axes and it’s centered on the machine, it doesn’t need to rotate to engrave the line…
Make sense?
Rotate the line 90 deg to vertical, then the rotary should move. You will see how it frames differently.
Of course, it’s too long for the circumference of the screw driver shaft.
Your rotary is setup for a 10mm diameter, that screwdriver is not 10mm in diameter at it’s shaft, is it?
I know the diameter is incorrect… What I am asking is why does the rotary make the small rotation before engraving the the small rotation back after engraving when the line is straight.
not centered but set the output center in the rotary settings. Ive been meaning to adjust the head so it is centered with the rotary but just havent done that yet. I havent used the rotary at all but will need it for the rings.
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It will be both, outside and inside. They gave me a handful of rings that were to be melted down to test with so they can get an idea of our capabilities.
Okay, so if a small circumference gives a large initial rotation, what happens if you specify a huge circumference? Does the initial rotation go away, or almost so?
Very true. I was more interested in behaviour. So if it’s linear to diameter it’s more likely trying to move a fixed distance.
A workaround might be to offset the image in the rotary axis (y in this case, as I understand) so the rotary doesn’t have to move for the head to be at the job origin. It might be worth trying, it might not. It’s certainly not a permanent solution, but it really depends on how much pressure Dan is under as to whether it’s worth trying or not.
The rotary moves a bit at the start to reach the center of the first split - in your case the split size is 1 mm and you have a line positioned right along the center point/origin in LightBurn, so it needs to move your object’s surface .5 mm to reach the center of the split. For an object with a very small diameter relative to the chuck’s, the chuck’s movement will be fairly pronounced, but the movement of the object’s surface (ie movement along its circumference) will not be. Reducing the split size will make this movement less pronounced, or even imperceptible. Try a split size of .1 or under.