In the market for a Articulating Arm Hollowing System. Any recommendations
Looks like there could be a fair big of play in those articulating joints. Do you ever get catches in cross grain hollowing?I have the Elbo system and like it. It can be used on any lathe with tailstock. It is set for 3/4 bar but using adapters can use any bar. Also one of the most reasonable systems out ther starting at 269.
http://wtwtim.com/elbo.htm
While not articulated It’s hard to beat the simplicity of the jamieson or the sinner systems.
I hollow through the face grain most of the time.Looks like there could be a fair big of play in those articulating joints. Do you ever get catches in cross grain hollowing
With more joints, it's like having a wrist and an elbow. Not just the elbow. I don't know of any way to get a catch with a 3/16" HSS scraping cutter that's held in a bar. My system is not perfect, it can get a little vibration in it. That Rube Goldberg design was inspired by the Kobra and has the same number of links. This was really my proof of concept, but the darned thing worked so well I just kept using it. I've gone as deep as 11" with it.Looks like there could be a fair big of play in those articulating joints. Do you ever get catches in cross grain hollowing?
I talked to those guys a couple of times at Indyfest gatherings. Just two retired, or semi-retired guys in a shop. They were enthusiastic about the development of the tool, but tried to sell the rights to production pretty quickly. No takers, but they would do a few at a time to recoup some development cost, and were happy with that for a while. Didn't feel like either of them really wanted to make it a business. It was a dead tight tool, with wonderful bearings and thrust bearings. Smooth as glass.I was wondering about that Cobra system. Seemed like they dropped off the map for a while. I know there were some 'complications' after they started up, and they never seemed to get back up...
robo hippy
What is the tallest vessel you done with the SHS@Guy Mueller, your answer to this question is going to depend a great deal on the type of hollow forms you will make and the type of tools (and tool rest) you will use, so keep this in mind when evaluating the advice you get.
Since you specifically asked about articulated arm rigs I suggest you look at
the Simple Hollowing System from Harrison Specialties, which is what I use. Here is a link.
https://www.harrisonspecialties.com/simple-hollowing-system-with-laser-optional-tools/
This is the best rig for me and what and how I turn. It might not serve any purpose for you. My hollow forms are shallow with wide mouths and a lot of work is done on the side walls and under what might be called the "rim", so the maneuverability of an articulted arm is paramount to me. I primarily use scraping tools and I have a couple of tool rests that can reach into the opening to extend the tool support.
http://www.turnrobust.com/?s=Box+rest
https://hannestool.com/products-overview/tool-rest/
The SHS is not a system I would reach for if I wanted to make a 24" deep vase.
There were a one time Monster and Kobra rigs, but I don't believe either is still in manufacture. The Elbow system is an excellent rig. The major differences I see between the Elbow and the SHS are:
The Elbow mounts to the tail stock while the SHS mounts to the ways. It is possible to use the SHS and tail stock simultaneously which occaisionally can be of use. There are generally more options for mounting.
If I recall the Elbow has a longer third segment as compare to the SHS. I think it is a little less maneuverable than the SHS.
The elbow mounts large shaft diameter tools. The SHS is set for 1/2" tangs, but has an optional 5/8" tool holder (I have both).
Check out the Gizmo at JT Turning Tools https://www.jtturningtools.com/gizmoThanks for all the thoughts looks I'm going to a captured arm system Jamiesson