16 Elgin blues…

Ok, that rules out a possible jewel problem.
Going back to what William suggested, have you tried putting the balance wheel in? It doesn’t always make a movement trip through by putting pressure on the third/forth wheel, it only takes a slightly worn pivot hole to bind things up and stop that happening because you will never get the exact amount of pressure through that the train will provide. It is only my opinion but I would be more inclined to put everything back in the watch and then try and deduce where the problem lies, just double check all the pivot holes/jewel holes are good, it only takes a fraction of wear to lock a wheel and pinion together and pushing the 3rd wheel with pegwood could be whats causing it? I am assuming you have double checked for bent pivots too?
Paul.

Tom,
Leaving out the main spring barrel gear, assemble the gear train into the pilar plates. Next, rotate the train by gently pushing on the center wheel. Remove the gears one at a time from the escape wheel back repeating the process each time. When the train turns, you should have the problem isolated. When this happened to me it was usually due to a pivot that was not in the jewel hole but it could be any number of issues.
david

Tom,
You have isolated the problem. A few places to look at this point are the pallet jewels for angle and length. The jewel on the long side of the pallet (right side) should have a more severe angle than the jewel on the short side of the pallet (right side). You must step through the movements one index at a time and observe the process. Check for the proper amount of drop and lock and make sure the angles on the pallet jewels are correct. If they are reversed, it will not work. Also, make sure the escape wheel has not been damaged. Each tooth of the wheel should be exactly like every other tooth in size and space between the teeth. if the banking pins are too restricting, they will not allow the pallet to perform properly.
david

Tom,
If you have another movement of the same type that works, it will make the job easier. I looked at the photo of your movement and the position of the right jewel is a bit unclear to me. With a second movement that does work you can trace through the escape and pallet movements simultaniously and check for differences in spacing and angles. It will also give you a more clear mental picture of where you want to go with the repair and adjustment of the non working movement. Keep in mind that this is a basic cam driven mechanical lever system. The cam is the escape wheel, the cam follower is the pallet jewel and the lever is the pallet arm. The angle of the pallet jewel is crutial in transferring the force from the escape wheel to the lever arm (pallet arm), then to the roller jewel and finally to the balance wheel to wind up the balance spring. After the pallet fork has done its job, it is held in the proper position by the banking pin until the spring forces the flywheel (balance wheel) back in the other direction, the roller jewel hits the fork and unlocks the latch. Getting everything to work properly is messy because any adjustment made will affect the other adjustments.
david

Tom,
Your work is cut out for you on this one. There are a lot of factors that are involved in getting the adjustments tweeked in. The spacing of the pallet fork, the position of the banking pins, the roller jewel clearance on the forks, the locking angle, the pallet jewel angle, and so on and so on. Unfortunately, any adjustment made will affect the other adjustments. I think Bob may have to step in on this one because I am sure that he has a procedure worked out from his many years of doing this. The banking pins would have given a starting reference point but since they have been moved the procedure must start from scratch. This will certainly be an incredible learning experience.
david