Celestron 5 for $150!
Posted 08 July 2014 - 12:16 PM
Turns out the black wire on the battery pack had come off. I had my Celestron power pack from my C11 so tried that and it worked! Tried to do a fake alignment and the altitude moved fine. But the azimuth motor was whirring but not doing anything
So I took it apart to see what was happening. Looks like the set screw that holds the gear on the motor is either stripped or just loose. The allen keys I have don't fit the set screw so I'll have to get one that fits and see if that works. Hopefully it's as simple as tightening it and I'll be back in business. If not I can either replace the screw or find another way to attach the gear and have it working again!
Anyone in the Phoenix area have a Nexstar tripod they don't need?
Posted 08 July 2014 - 12:46 PM
I love the Orig. nexstars, what they lack in features they make up for in smooth motion and quiet slewing...
Posted 08 July 2014 - 01:13 PM
Posted 08 July 2014 - 03:36 PM
If the AZ driver gear uses the same set screw as the AL assembly then you need a 1.5mm hex wrench.
1.5mm is a bit too big and they didn't have anything smaller at Lowes. So ordered a small hex set from Amazon with .7, .9 and 1.3. One of those should fit! Now just have to wait a week until that comes in!
Anxious to see if the rest works, but it's looking good now. I soldered the battery wire back on, so it should run on batteries again.
Oh also I have a hair stuck on the inside of the corrector. Trying to figure out a way to get it out... maybe a qtip taped to a chopstick?
Posted 08 July 2014 - 04:14 PM
The Q-Tip idea should work OK. The grocery store has skewer sticks that are 12" long.
Posted 09 July 2014 - 10:28 AM
Are the bolt holes for the Nexstar 5 the same as the newer SE versions? What about for the CPC series? I did find a heavy duty CPC tripod but it's $200. It might be overkill, but it sure would be solid!
Was thinking of buying a solid tripod like this and drilling holes to bolt the mount onto.
Or the Meade ETX version, but I don't think it's wide enough to bolt the nexstar mount onto!
Any other type of tripod I could look for on CL that I could put the mount on and be stable?
Posted 09 July 2014 - 11:03 AM
The attachment is a full scale drawing of the CPC bolt pattern.
Posted 09 July 2014 - 01:59 PM
The drive gear passes over the bolt holes in the base and will foul if they are too long.
Or at least that's the way it is on the 8SE.
Slew around until the gear is over one of the holes and get a safe depth that way.
You got a nice deal there, good luck with the tripod.
Posted 10 July 2014 - 09:54 AM
Thanks for the bolt hole pattern/template. That will come in handy if I go to buy a tripod.
Thanks for the reminder about the bolt depth. I saw that the holes were quite shallow and the bolts could poke through when I had it apart to check out the drive gear.
Posted 11 July 2014 - 08:30 AM
The pluses of the N5 are the great optics and the Pittman motors. The downside is limited repair options if the electronics go south. I have one with lots of miles on it that I have to tear down and adjust the spur gear lash, but otherwise it's great.
If you find that the Az spur gear has been stripped, I have some spares. Also have one or two N5/8 tripods. PM me if interested. BTW, I was organizing gears and discovered that the manual AZ spur gear used in the old AC powered Celestron mounts has the same diameter and tooth count as the N5/8 Az gear. Guess they didn't even have to change the gear machining set up to make 'em. Wounder if the mount design was built around the existing gear stock?
Posted 11 July 2014 - 08:41 AM
Posted 14 July 2014 - 05:04 PM
Thanks for all the help.
(Still need a tripod for it, but one thing at a time).
Posted 16 July 2014 - 03:26 PM
Here's the v2 of the finder, but it's similar:
Guess I need something like this to mount it on the scope?
Or I might just get a cheap one like this for the C5 and mount the Orion to my C11!
Is there something I'm missing on how it can mount to the scope?
Posted 19 August 2014 - 12:35 PM
Kevdog, that should do the trick. I purchased one of those shoes for my scopes when I wound up with an EZ Finder Deluxe through my used equipment purchases.
Edited by austingonzo, 19 August 2014 - 12:35 PM.