"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.
Celestron Nexstar 8SE with 6.3 focal reducer SV 90mm SVT Raptor APO Triplet Refractor Celestron AS-GT (Hypertuned) Orion SSAG/Mini-guider Canon T3i DSLR modded with Baader UV/IR filter Backyard EOS/Deep Sky Stacker/Photoshop CS5
Quote: Oh, dont forget to get a 5mm/25mm cap screw or knob for your top mounting plate..I see you have a hole, mine didn't have a set screw in it, had to install a cap screw to remove all the vertical play it caused with an OTA in place.Clear skies,Paul
Quote:Has anyone tried AP with his mount yet?George
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Quote:I would not be at all surprised to hear that a little mount in this class was limited to about 30 seconds. If the motor is speeding up and slowing down randomly, that is NOT periodic error, and you have some kind of problem with the electronics, likely.
I'm thinking a bad servo motor or 'stiction' in the gear train. Hopefully, iOptron will sort it out.
Quote:But during the "groans", the sprocket vibrated back and forth very rapidly, by about 10 - 30 degrees of rotation, all the while maintaining a somewhat regular rotation rate. So, in other words, it would advance one way a certain amount, then back-up the opposite direction, and so on, but always advancing more than it backed up.
Quote: by the way, Paul, your M31 is really darn impressive coming from an achromat, this mount, and 30-second exposures. You must have really dark skies, i'm envious
Ed Thomas Deep Space Products www.deepspaceproducts.com
Quote:My mount also "groans" at approximately 1 second intervals. As you slew the mount at progressively greater rates, the "groans" get faster until they blend together at the highest slew rate.
Skyguy didn't specify for his mount, but on my mount, each 'groan' only lasts about 1 second, with about a 0.5 second of quiet inbetween. It's very regular ... sounds like someone snoring. So I don't know if that explains your tracking problem. Does your mount make any such noise, or does it run quietly?
orlyandico : You're right. Servo, not stepper motor. Should have caught that from the previous posts.
Quote:Ed, I was going to comment on that plastic worm gear but you beat me to it.Maybe it is one of these new structural plastics... could be better than the horrific worms and wheels put on EQ-1's and EQ-2's.
Quote: Just wait until they start using 3D printers to make telescope mounts.