So let's start some discussion and things to look at - Why does the motor pinion gear on our 28 Dometop (tty #2) at the ship keep breaking, and how can I "test" for it? I need to solve this for sure before putting any more 45 baud gears into it, and for now, I'll prob put the 75 baud set back in temporarily.
Originally I suspected the intermediate gears were never aligned/adjusted, but in swapping the latest gear set, I made sure the gears were meshed well but not tight. I also took that assembly apart and re-greased the bearings on it with mobile-1 grease. The printer was printing great, in fact, SOMEHOW, it was still going despite half the pinion gear being completely missing! (The intermediate gear survived undamaged as well).
In both cases, the unit was on/running for a while (first was sitting idle, this time it was printing) and in both cases, I came back to it making noises after the gear went.
Now, I'm suspecting either the printer or perhaps the TD is adding more drag than normal, causing both the gear to be under load, and in the case of the TD, the drag causing the motor to get hotter than normal. In this case, would it be normal to check the amount of current the motor is pulling? Next time I go in (which may not be for a couple weeks), I'm also taking a laser temp gun to take a reading off the motor with just the TD on it. There is a capacitor on the LEU? that I'm not sure is part of the motor or not (I think I'm gonna say no). Also the electrical filter at the bottom was bypassed as that blew up too. (This unit is definitely giving me a college course on TTY).
The next thing is - I was originally running the printer with no screws in the print mechanism (but solidly seated). Both cases it wasn't until after I screwed down the printer with a couple screws on opposite corners did the gear break, so I'm wondering how the printer gets adjusted to the intermediate gear, since there's no way for me to adjust that with the printer in place. (I think)
Without going through the 1900 page manuals, are there any temperature specs for the motors?
Any other ideas? You guys are the experts! :-)
Jeff