"Life is a journey, enjoy the ride" *********** Stellarvue 90 Raptor CF.Explore Scientific 152mm Comet Hunter.Orionx14g.Borg 125SD.Borg 60ED. Borg 50Achro. AT10RC. AT6RC. iOptron iEQ45GTN w/TDM.iOptron ZEQ25.iOptron Cube Pro.iOptron MT Pro/iOptron SmartEQ Pro.Celestron 10x50 Way too many EPs, flatteners and reducers. Nikon D5100, Canon T3i and a bunch of filters.
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
Developer of Hyper-Modded 450D and iAstroHub Astro-physics 155EDT, Takahashi FSQ85EDX Losmandy G11 Gemini, iOptron ZEQ25GT QHY8L, QHY6, QHY5L-ii-c
Quote:Paul.The major problems discussed in this forum are mainly all about the RA play and crosstalk noises. With your video instruction, there is nothing to worry about. Many thanks for your effort.Anat
Zhumell Z10 on homebuilt base (leveling feet, degree circle, Wixy alt, lights, eyepiece case, wine cellar) and custom hand cart WO 80 mm ZenithStar, C102ED, Coronado PST, C8, ES127ED iOpton SmartEq, CG-4 mount, AT Voyager mount, iOptron ZEQ25, iOptron iEQ45 mount Eyepieces - yes 10 x 50 Pentax PCF WPII binos iPad with Skysafari & SkyWire Samsung SDC-435, Canon T3i (Gary Honis Baader mod), Canon SX-40, ASI120MC
Quote:Paul Thanks for the useful diagnostic. How about a comprehensive iEQ45 tune up video? Bob
WHISTLESTOP Whistle Stop Observatory (44N78W) TEC 140 Canon 200mm f2.8, 135mm f2, 50mm f1.4 C9.25 Takahashi NJP with Temma 2 FLI ML8300 with CFW-2-7 Canon 6d modified iOptron ZEQ25 portable EQ mount
Quote:Could you please repeat on your mount the test with the mount original springs? In this way, we can see if the problem is related to the springs or to the mount....
Quote:PS instead of replacing the spring I just used some refolded aluminum foil to make a 2-3mm thick disk to be inserted in the spring-housing inside the screw before inserting the spring. In term of holding force, the effect of shortening the spring-housing with the disk is equivalent to the use of a stiffer (or longer) spring. However with the disk you avoid to look for new springs and, by varying the thickness of the disk (just adding some extra layers of foil), you can rapidly and finely tune the force.
Quote:Yes if you compress 1/8" on both springs same force, however a 18mm spring will compress further then a 15mm spring with 3mm spacers.
Tony Nevada City, California
Stellarvue SVQ 100, iOptron ZEQ25, Olympus E-PL5, E-M5, E-M1
Quote:Thank you, Paul, for the tuning videos. I replaced each tensioning spring with two 0.5 inch springs as suggested, then did the whole tuning thing for both axes. Last night it just worked. PHD gave Osc-index values of 0.16 to 0.27 and RMS 0.10 to 0.15 through approx. 400 subs totalling 5 hours exposure time, with round stars. Contrast was less in the moon-bright sky, but autoguiding worked well, even though missed guiding steps due to star mass variations (twinkling) were frequent. With short (1 minute using my 100mm, f/2.0 lens) exposures due to sky brightness, I didn't need autoguiding at all. The tuned ZEQ25 is a keeper.
Quote:Paul, in Part 2 at around 2-5 minutes for worm mesh adjustment, it appears you loosen the 3 allen bolts, tighten the tension screw with a spacer, then tighten the allen bolts.Which part actually adjusts the worm mesh and how can you tell what the right amount is?
I'm a new ZEQ25 owner, very grateful to Paul for making the tune up videos. I'd like to replace my springs, but HomeDepot had nothing, and the springs at the local Ace Hardware were close but not quite right. I just spent some time at McMaster Carr looking for springs with the right specs, but no luck there either, at least not with the specs Paul posted.
Paul, where'd you get yours? Or anyone else know of a good supplier?
Quote:OK thanks.So replace the tension screw spring with two springs, outer and inner, half-inch.Is everyone doing this for the RA tension screw, or also for DEC?