debugging the anticipating carriage

In playing with the manual test jig for the anticipating carriage, there was one configuration that caused interference between two parts. It became clear that I needed to do a systematic analysis of all combinations of vertical motions. There are four basic vertical configurations which have to accommodate various part motion: 

1. the rest case where all warning arms and sector lifters are down
2. the non-carry case, where the arm is "not warned" and is raised, and the sector lifter is not raised
3. the direct carry case, where the arm is "warned" and raised, and it raised the sector lifter
4. the propagated carry case, where the arm is "not warned" and raised, but the sector lifter has been raised with the movable wire

The analysis showed that it was case 2 that caused interference, when the sector lifters were rotated to the position which forced the arms to "warned", which is needed so that case 4 sectors will be engaged and positively lowered when the warning arms are lowered.

The "force arm" mechanism clearly need to operate on a different vertical plane that was higher, and offset horizontally so that it wouldn't interfere with sector lifters that were down. Here's the analysis of the fixed design, which uses a post on the lifter's shortened "force warn" surface, and a cantilevered mate on the carry warning arm. 

In the end it meant a relatively simple modification to the lifters and warning arms.

This seems to work without any interference.  Or better said: I haven't found any yet.

It is so wonderful to be able to make quick changes to the CAD design, print the parts, and try them out. Babbage would have been all in on 3D printing.