I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
Others may disagree. Your millage may vary. Void where prohibited by law.
Orion ED80 Lunt80 with DSII Lunt 152 AT 102EDF Celestron 6SE with HyperStar Celestron 6" f/8 Refractor 8" Newtonian/Cassegrain Byers 812 SkyWatcher AZ-EQ6 Celestron 9.25" CPC 1100 with HyperStar 17.5" AstroSystems TeleKit ExploraDome II Life Member and ALCOR - PAS New Orleans ALCOR - PAS Mississippi Waning Moon II Observatory
Homemade 14.5" f4.3 Truss Dobsonian
"I'd like to remind you at four in the morning my world is very still, The air is fresh under diamond skies, makes me glad to be alive." Randy Bachmann "Blue Collar"
“A mind is like a parachute. It doesn't work if it is not open.” ― Frank Zappa
Greenfield, Indiana USA
Deforked 1979 Orange C8, WO 66mm APO, 80mm f/7 refractor, Sears 60mm refractor, 80mm Orion short tube
Meade LX80 IOptron zEQ25
Quote:So to correct play in the axes, the technician losened up the motors. As a mechanical engineer, this seems to me to be the opposite of what was needed.
Quote: I wonder why Meade chose to go with this gear design for the LX80 - especially when they were advertising it with up to a 75# load capacity.
Quote:Jim,I have had about 20 pounds on my mount with out problems with play in either AltAz or Polar mode. It looks as if some have a problem and some don't. When did you receive your mount?
Quote:Given what just happened on that "Repair," it would appear Meade has no idea there are any issues with the LX80 drive. -Rich
Quote:Gday Jack Quote: I wonder why Meade chose to go with this gear design for the LX80 - especially when they were advertising it with up to a 75# load capacity. No idea. I was hoping they might have reused something like in the LS.Thats really rock solid in RA and no cheap plastic gears in sight.Andrew
What some may view as an argument I view as a different perspective.
Quote:You meant the LX, right?
Dave Jessie Outreach Events
Quote: When you have something that works great you don't change it.
Quote: So it appears Meade went with a better worm/worm gear combination in a mount that supports a much lower load!
Quote: No, I think he meant "LS" for "LightSwitch" which is what the photo looked like to me.
Ed Thomas Deep Space Products www.deepspaceproducts.com
Quote:Ed,Is the current state of the gearing somthing that a guy that offers hyper tuning service could address as an after market mod?
Quote: It seems to me that the reason for the shallow pressure angle on the LX80 teeth is due to the very small diameter of the worm wheel.
Quote:I think that is what this comes down to. In presumably an attempt to eliminate backlash,
Quote:Gday Ed Quote: It seems to me that the reason for the shallow pressure angle on the LX80 teeth is due to the very small diameter of the worm wheel. So why does the ETX work???That has a low pressure angle worm and a much smaller dia worm wheel.( It doesnt track as well as a large dia wormwheel, but it does fit )Ie the pressure angle could be achieved easily enough by selecting a worm "pitch" and diameter and then matching that to a proposed wormwheel dia and reverse engineering a suitable toothcount using industry standard tooth designs and sizes. The Autostar code allows for different geartrain ratios in software, so the wormwheel toothcount could be anything that fits. Quote:I think that is what this comes down to. In presumably an attempt to eliminate backlash, 99.9% of backlash i have seen, ( where the worm is springloaded ), comes from the geartrains, not the worm to wormwheel interface. If they were trying to remove lash, the plastic geartrain would have been the first thing to re engineer.( and that would also help reduce the PE being seen as well )Andrew
Quote: I've never been inside an ETX. Are the worms spring loaded?
Quote:I think that we got out lines crossed on the second part. I think that they went with the spring loading to eliminate the worm/wheel backlash that is always present with a static worm system.
Quote: The difference is that backlash in the worm/wheel can be compensated for by off-balancing
Quote: Elastomers aren't true springs, and change properties with temperature. A lot of the "ETX works" would appear to be not asking much from it
AT80ED; AT111EDT; ES127ED; Vixen 140NAssf
CGEM; LX-80; WO EZTouch; DSV-3
Vixen Polarie with Canon 60D Coronado PST W.O. 66 APO TV 85 Meade ETX90, AR6 w LX 80 Mount Meade LX90 18" Obsession with ServoCat and Argo Navis iPad Mini w Sky Safari Pro and SkyFi