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Some notes on adjusting the worm on a Titan vs G11 or GM8

1. The G11 and GM8 use individual worm bearing blocks.? Each block has a bottom "nipple" that fits a specific hole.? The left hole, closest the gearbox, is a pivot point.? You simply pivot the worm into the ring gear using the pivot point, feel for free worm tightness, then tighten down the worm blocks....done. Then you adjust the gearbox until the Oldham coupler plastic center just rotates, not shifts.? Then attach the motor...done.??

2. The Titan has no pivot point.? Both mounting bolts can swivel and pivot so the worm can shift left or right.? The length of the worm enclosure block is larger than the plate on which it mounts. You must therefore rest the worm in its enclosure on top of the ring gear, and perhaps use a level, and feel the ends to see if your block is nearly centered.? ?

Fortunately, if your Titan has tucked motors, the entire drive gear assembly is bolted directly to the worm enclosure.? You can tilt or shift the week RM and not affect the drive gear train at all.??

Some owners have used automotive feeler gauges to measure the gap on either end of the worm block, to see if it is level.? You'd need two sets of feeler gauges and the gap will be thick.??

When you have the worm block assembled don't completely tighten the 14mm nuts that hold the worm block down.? You can use the upper Allen head bolts to pull the worm block up off of the worm if it has too much friction.??

It is best to have an ammeter equipped power supply to the Gemini, to tell the Gemini motor current.? Then you can determine the gear adjustments that give consistently low motor current. (If you need one, contact me separately).?

---- other related adjustments ----

As I mentioned in an earlier post, one problem area is the worm can have a lateral shift, or be pressed too tight leading to worm friction.? On the OVision worm block for the G11, they used a Belleville spring washer under the end cap screw.? Losmandy doesn't use one but I think that's a best approach. The spring size to use is for a 6200 size bearing.? You put the outer cup edge forcing into the worm bearing OD, and let the inner cup edge go against the threaded endcap.? I use two such Belleville washers inner cup to inner cup.? Then just screw in the end so until the Belleville washer(s) and worm bearing are in contact and turn another 1/8 turn.?

Finally (?) I find the worm to ring gear grease is also important.? You want the lowest friction possible because the worm has to rub nearly perpendicular to the ring gear.? This action is like the bowing of a violin string, and can lead to a vibration ("chatter").? The lube with lowest "4-ball test mark distance" of 0.6mm, and highest Timken test rating of 60 lbs is the CRC Brake and Caliper Grease.? This gave the smoothest performance to my G11T titan RA drive.? That lube has anticorrosion ingredients and the same low copper corrosion behavior as Super lube.? But it seems to stays in the metal to metal high pressure contact point of the worm to ring gear better than superlube.

?Best of luck,

Michael