Succeeded with print escapement and space function adjustments!

INTERACTIONS OF PULL ROD AND ESCAPEMENT TRIGGER ECCENTRIC STUD

The eccentric stud moves the claw, the escapement trigger, thus the clearance above the torque bar tab changes. These are not sequential adjustments as the manuals present them. Instead, they interact so that one must iterate changing one and then the other until the combination is found that reliably restores over the torque bar tab when a print cycle is done, but also reliably trips the escapement pawl out of the rack and reliably pops off the tab to ensure the action is a single column movement.

I figured out a technique to adjust the eccentric which involved marking the screw for the initial position and then turning to predetermined rotations. The screwdriver had to hold the screw from turning at this point while the nut on the back was tightened. As before a large screwdriver holds the escapement lever down so the eccentric screw is exposed. 

SUCCESS ACHIEVED

For a while, I would get print escapement working but not space, or get space working but not print escapement. Eventually I realized that a torque bar backstop adjustment was also involved and that was the key to success. The machine now reliably moved a column after print cycles everywhere across the print line. 

OPERATIONAL CLUTCH DRIVEN SPACE MECHANISM ADJUSTMENT

Because the lever that triggers an escapement is set up well, the adjusting screws can do their work. When the left operational clutch is triggered by the Space lever being released, it pushes a vertical lever in the rear of the machine under the bail that moves down then up during the clutch cycle. The space lever is released by either the Space pushbutton on the front of the unit or the solenoid attached to it being energized. 

The vertical lever rotates an arm downward, with an adjustable screw making contact with the main lever for print escapement. Moving the screw up and down determines how much the main lever moves when the operational clutch operates. 

Rear adjustment is for space function

The goal is the same as with print escapement, having the rest position of the claw .008" from the escapement torque bar tab when the space function is not operating. Then the movement of the lever should be sufficient to trip the escapement during a space function. 

Maddeningly, settings that work are very very narrow ranges of the adjustment screws. I found a set of adjustments that worked for the space function but when I tightened the locknuts down, it no longer worked. 

I found a happy point for the settings which reliably moved the carrier one column right whenever the Space operational clutch was tripped. This meant that I had the two means of triggering an escapement - the print cycle pull rod and the operational clutch mechanism - both functional. 

The upstop had to be adjusted after both of these, since you move it out of the way when making both of these movement adjustments. With that done, the typewriter should be adjusted properly for spacing. 

VERIFICATION- BOTH MOVING THE CARRIER ONE COLUMN TO THE RIGHT

I did a hand cycle of printing at the left, middle and right side of the machines carrier range to verify that we had a good single column movement after each print cycle. The SPACE pushbutton with hand cycling tripped the operational clutch and moved the carrier one column to the right. The solenoid was manipulated to trip the operational clutch and the carrier again moved one column to the right. I did the SPACE button test at the left, middle and right of the carrier movement range. 

REVERIFYING CARRIER RETURN SINCE I HAD TOUCHED IT TO FIX THIS ISSUE

The adjustment I made to the carrier return latch mechanism allowed the escapement torque bar to sit upright in its rest position, rather than partially twisted. Another part of this adjustment ensures that the escapement torque bar is turned far enough to completely pull the escapement pawl out of the rack during return operations. 

I checked that the carrier return happens without any sound of pawls bouncing over rack teeth. Everything is ready to move on to the last adjustments, where I get character selection dialed in for reliable printing.