Hi all. I am trying to figure out which rotary I can use for my Omtech fiber to do tumblers. It seems as though the ones on the Omtech site will not work as the jaws to do not open wide enough.
Thanks
Most chucks are very adjustable. I would confirm with the rotary manufacturer to learn the maximum size of tumblers you can use. Does the one you’re looking at provide specs? Share a link, maybe someone else has the same and can confirm.
I did ask them, but still am not sure.
They said opens to 2.7 max
80mm 3 Jaw Rotary Axis for Laser Engravers – OMTech Laser
27mm is likely the travel distance if the jaws. Maximum capacity depends on the jaw extensions shown in the image. You can also fabricate your own jaw inserts for a particular need. Your limit is going to be how far you can move the chuck from the base. My chuck separates from the base so I could theoretically turn a cup 12" (or even more) in diameter.
The same Rotary on ebay (sold by someone who contracts with Omtech) has this in their description " rotary axis attachment that allows you to mark on cylindrical objects up to 2.7" in diameter"
I do have a 3d printer so I was thinking about 3d printing some jaws … but I have not seen a file for them. I could probably to create a file. I also saw someone has 3d printed jaws on Etsy.
In any case, I was really hoping there is a rotary I can attach to an Omtech fiber (for tumblers) without me having to make modifications.
The Piburn grip is the way to go. They have one specifically for Galvo machines. It is significantly more expensive than any of the Omtech ones, but I feel it’s worth the cost if you plan on doing any volume.
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you can open the jaws up inside a tumbler as well as trying to grab from the outside. Also printed jaws are available that increase the capacity, not very expensive, so the files must be available. Don’t need to spend a lot of money on a chuck rotary for fiber laser.
I was mainly using this rotary with my fiber laser. It came with two sets of jaws (internal and external) and could grab most anything I threw at it.
More recently, I picked up this low-profile rotary specifically for engraving Contigo travel mugs. It has reversible jaws that bolt on with three small screws each, and it has enough capacity to grab the rim of my mugs, but I might print some bespoke jaws for the mugs.
I got the low-profile rotary, a set of tower extensions, and a 300x300mm lens so I could do single-pass full-bleed art on the compound-curve Contigo mugs, so if you’re just doing “normal” mug engraving, you wouldn’t have as many constraints.
Thanks. I will probably get the one from Omtech and purchase the 3d printed jaws.
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Another option is to build one to suit, I purchased a 6:1 belt drive reduction armature on ali, put a motor and a chuck on it, really smooth, run the stepper at 6400 resulting steps in LB 38400.
Mine looks something like this except I oriented the motor on top instead of off to the side. I would have bought the whole thing except I had a chuck and motor already.
https://www.aliexpress.us/item/3256807527893106.html?spm=a2g0o.productlist.main.3.191267bd1SxaTt&algo_pvid=b109112f-59f2-45bc-8197-9a4b966157fa&algo_exp_id=b109112f-59f2-45bc-8197-9a4b966157fa-1&pdp_npi=4%40dis!USD!388.08!213.44!!!388.08!213.44!%402101e9ec17356672093481528efc62!12000041967857375!sea!US!4238440360!X&curPageLogUid=IMFn30u8XVxD&utparam-url=scene%3Asearch|query_from%3A
Use a couple aluminum angles to clamp it so I can tilt for inside work.
Just grab the jewelry chuck with the main chuck for smaller work.
