Here's the thing - I get all the worm backlash stuff, but for Dec, the stiff grease could cause issues with the reversals (Stiction is a term that comes to mind :)).
By the way - I see the decreased performance in Dec. with decreasing temps.
Here's what I'm gonna try when I get a chance.? Flush all the grease out of the Dec gearbox and put in a light oil.?
There is not much need for grease in these gearboxes (low load when guiding - arguably high when slewing) as the teeth are (I think) involute (I only eyeballed them once) which have a rolling contact.
A bit of grease will help with backlash, but it it gunks up under low temps, then - well - it kinda has the reverse effect.
I tend to write in fractured - hyphenated - parenthetical - sentences - so sorry in advance.
Thoughts on gearbox grease?