I think the RJ11 is used because it's very common, inexpensive, and in this application, does not need to pass a lot of current. I suppose the only upgradable part is the PIC, but the scope's operation is so simple, its unlikely the PIC would ever need to be replaced. Thank you.
@gutbucket1638
11 жыл бұрын
Had a bad Meade drive decades ago. Sent it to Meade to get it fixed, they sent it back and it still didn't work. Opened it up and it was simply a bad solder connection. Took the solder iron longer to heat up than it took to fix it. Never bought another Meade product again.
@HeilmanHackatronics
11 жыл бұрын
Nice video, informative repair videos are always a great watch.
@mitse2585
4 жыл бұрын
Thank you for this excellent video. Where to find the paper documentation that you mount on the "pulse declination drive"? Do you know the electric specifications of the drive declination # 93549 engine?
@gettingpast4391
3 жыл бұрын
looks like it's catching up. Should encoder count fall behind, it keeps track of how far off it is and catches up on it's own.
@pinballpsycho
9 жыл бұрын
Cool. I have a super old C-8 with a similar clock drive, but mine doesn't have any smart equipment; you plug it into AC and it just starts running. I uploaded a stop action video of the drive running on my page a few years back.
@TSAlpha2933
Жыл бұрын
I know it's been a while but If you've still got the mount, I'm working on a project to create a "bolt-on & drop-in" go-to solution for these older fork mount Ultimas.
@jix177
11 жыл бұрын
That's a surprising usage of RJ11 connectors. Are those components meant to be interchangeable or upgradeable by the end user? Nice job, keep the vids coming.
@TSAlpha2933
Жыл бұрын
Celestron and Meade both did similar things since they began to computerize their mounts, mainly because it was common hobbyist (8 bit micro and robotics) hardware. The connectors for the newer NexStar mounts are R still J-11 and RJ-9.
@eaglehimmel5491
4 жыл бұрын
My mount doesn't have an electrical issue, mine is more mechanical. When you turn the knobs for right assention or declination, nothing happens. If the scope does happen to move, you can almost feel the gears slipping. I was told by celestron they can't replace the part and to get a new mount, but I was really hoping to fix it instead. Any suggestions?
@TSAlpha2933
Жыл бұрын
For the RA knob, remove the two screws holding the knob housing to the sprocket plate. Once you have removed the knob assembly, check to make sure that the gear freely spins when you turn the knob, that there is very-little or no vertical slop, and that the assembly is greased. If there is slop, find a hex wrench 2 or 3mm I think) to loosen the grub screw on the knob and tighten it so that it spins freely and has no slop. when you replace the knob mount on the base, make sure that you are holding the knob mount as close to the fork as possible, to make sure that the gears are meshing. Then tighten the screws. You can also take this opportunity to adjust the tightness of the locking lever nut.
@TSAlpha2933
Жыл бұрын
For the Dec adjustment knob(s)... first ensure that the adjustment arm's collar/clamp is correctly attached to the fork's pivot point, and that the locking lever-nut is also correctly tightened and locked. next check that the sleeve nut & threaded rod connecting either the Dec-motor coupler, and adjustment knob, or the 2 adjustment knobs is connected properly at all 3 points, and that there is no slop at any of these points.
@dabasobservatory6202
4 жыл бұрын
hi eric i have slt alt az 127mm celestron mount .my mount motor not working error 16/17 any budy tell me what sensor are working in these motor .encorder sensor ? sorry i am not good in english
@stevesiedentop7133
3 жыл бұрын
Those codes indicate the motor control boards is not communicating. Lots of info on this at nexstarsite.com. You’ll likely need to replace the motor control board unless you have the skills and specialized equipment to repair it. Celestron usually has parts in stock although currently availability is going to be unpredictable.
@devilmastah
11 жыл бұрын
Thats a nice telescope (got the same)
@TSAlpha2933
Жыл бұрын
If you've still got it, I am working on creating a drop in, bolt-on go-to solution for the Ultima series forks.
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