In a message dated 4/22/2007 8:43:23 A.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> About a year ago I had a conversation with the m2 people about their
rotator
clamp slipping on my Monstr's mast. What follows is my memory of the
conversation:
> 1. It is better to have the clamp slip than to harm the rotator. (Note:
the
wind banging repeatedly on the gearing can weaken the gears?)
> 2. The specified braking torque has not been measured (or calculated?).
> 3. Pinning voids the warranty. I would assume that using a different
mfrs
clamp would also void the warranty.
> 4. They recommended a clamp bolt tightening sequence that should be
followed. Unfortunately I wasn't able to get a firm answer on what torque
to tighten the nuts to. The sequence to follow is:
> a) bolt the rotator to the mounting plate but leave the bolt/nuts not
tightened
b) with the bolts to holding the rotator to the mounting plate loose,
tighten the bolt/nut pair of the clamp that is nearest the bottom.
c) tighten the next (middle) bolt/nut pair of the clamp
d) tighten the top bolt/nut pair of the clamp
e) repeat steps b,c,d several times
f) now lastly, tighten the bolt/nuts of step a
> I did get an answer of 40 ft/lbs from the m2 person but I think that was
just pulled out of the air.
Very interesting but not useful. It doesn't do anything about the
significant design flaws of the Orion mast clamp that ARE the problems. None
of the
above will keep the mast from slipping.
Cheers,
Steve K7LXC
TOWER TECH
************************************** See what's free at http://www.aol.com.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|