Rope Twister: an indexer program to create rope twist files
Overview...The Rope Twister does
the calculations and creates the part file to do rope twist turnings on a
ShopBot indexer. It needs one of the fancy rope twist (sometimes called Barley
Twist) bits that look like a stretched out roundover bit that comes to a point
in the center. The program calculates the angle that the twist has to be made in
to fit your blank diameter and bit size, which may or may not end up being the
look that you're shooting for. In other words, if you want a precise SPACING
between the twists this is the program for you, but if you want a particular
ANGLE of the twists then the spiral option in the Indexer Virtual Tool might be
a better choice. [ Update 04/04/07 Calculator added to zip file to
calculate twist values to enter into Indexer Virtual Tool ]
Notes...Your indexer MUST be connected to the B-axis in your control box for this to work. And the Z-axis has to be zeroed at the center of the blank.
Contact info...Bill Young
Download size...24 k
Additional equipment/software required...nothing other than an indexer and those fancy bits
Special instructions...It's possible...and quite easy actually...to enter values for a turning pattern that's impossible to actually turn. For instance you can't do 3 wraps with a 2" spacing around a 1" radius blank...they just won't fit.
Known Issues...None so far, but as always make sure that you aircut to test before actually using the file with a blank.
Download the Rope Twister