hello dear community,
have you ever thought of a comparison of two well known systems in jigs:_
what about the discussion of the pros and cons and the difference between Arctos jig and joe Roggenbrucks Jig
i recently came across a discussion of two different jigs: the arctos-one and here we take tanner w as a model - and on the other side - the jig of
Joe Roggenbruck - from cobraframebuilding.com
first of all here the Arctos type: - made by tanner W.:
https://www.instructables.com/Bicycl...-Building-Jig/
In Portland I learned to build using an Arctos jig. The simplistic, functional and approachable design seemed like an obvious choice for me. I scoured the internet for photos of bicycle frame jigs, in particular Arctos jigs. A handful of people have posted photos of Arctos style jigs that they have built. Alex Wettmore built a very close replica he called the “Arctos Clone Frame Fixture”. His photos and descriptions were helpful and inspiring.
With the Arctos model at the core of my design I started out to make changes to suit my specific needs. Some of the changes I wanted to implement included the option of simple attachments to make a tandem frame as well as room for extra long chain stays (for cargo bikes). The room for long chain stays was easy. I simply left the main spine of the jig as long as possible. I will discuss the the tandem attachment I came up with later in this instructable
and second: the frame-jig of Joe:
https://www.cobraframebuilding.com/creator/resources
A Drive Side In Fixture is pictured. If your fixture is Drive Side Out the numbers are the same, but in mirror image locations — 180mm on the right side of the Seat Tube Plate and 10mm on the left etc.
FIXTURE SETUP VARIABLES
These are the fixture setup variables, which can be found in Bike CAD. Two linear variables (htx, hty) pertain to the location of the bottom, center of the head tube. Two linear variables pertain to the location of the dummy axle or rear hub center. One angular variable describes the head tube-seat tube difference. This number is the seat tube angle minus the headtube angle, not the other way around.
Look forward to your ideas and thoughts