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Equipment Discussions >> Equipment

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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Help with a Meade DC drive
      #5526038 - 11/18/12 12:36 PM

Hi All,

I have a basket case Meade drive tha needs assembly and need help getting it going.
I do not know how to assemble the parts as this is the way I got the mount.
Would like to get this going to be able to take to darker skies.
Photos comming later today as I gather up the parts...

Many thanks in advance,
Mike


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Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5527842 - 11/19/12 12:23 PM

Meade's been making DC powered scope since 1985. Any idea of which model we are talking about?

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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Geo.]
      #5528764 - 11/19/12 08:41 PM Attachment (47 downloads)

Hi George,

I have a pic here..
Don't know what model though.
Hope this helps.

Thank You much,
Mike


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5528775 - 11/19/12 08:45 PM

I have no idea why the white paint blocks some of the "windows" and, the little piece has slots and don't know how or where it mounts to...

Mike


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re:Please help with a Meade DC drive new [Re: Michael Cave]
      #5531014 - 11/20/12 08:48 PM Attachment (34 downloads)

A close up of the two parts that need to go to the right place...Can take other pictures as needed...

Edited by Michael Cave (11/23/12 07:13 AM)


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Darenwh
Carpal Tunnel


Reged: 05/11/06

Loc: Covington, GA
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5531170 - 11/20/12 10:17 PM

That looks like part of an Autostar or similar system. The black disk with the little windows is part of an optical encoder and most likely was glued to the silver circle you are pointing at. You can see glue residue on the silver disk. I think this needs to be glued centered on the disk. The other part I am not sure about. Good luck.

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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Darenwh]
      #5535814 - 11/23/12 04:13 PM

Thank You Daren,

I'm with you on where the disc goes... and hoping someone can post a pic of their drive to show where all the parts go
to see if there is something missing on mine.

Mike


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Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5537971 - 11/24/12 10:33 PM Attachment (31 downloads)

This looks like the DC RA drive from the Meade Starfinder Newt's German mount. The drive system is similar in design to the LX50s. Some of these and some LX50s have the paint on the interrupter disk and some don't The other part is a slot mask and it has to be placed between the interrupter and the IR detectors. Its placement is somewhat critical in the LX200, which uses two sets of emitters and detectors to provide rotation direction data. Not sure how critical it is here. The blob of paint makes me think that it can't all that critical.

Here's the LX50 circuit:


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Geo.]
      #5537997 - 11/24/12 10:46 PM Attachment (27 downloads)

Hi George,

Thanks again...
There's also a port where a controller plugs in (I don't have the controller though).

I placed the two parts in the correct (I think) location and the wheel spins and stops, spins and stops continuosly.
Do I need to get the controller part to have it track correctly?

Mike


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5537998 - 11/24/12 10:47 PM Attachment (28 downloads)

Another pic of the mount...

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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5538673 - 11/25/12 12:37 PM

Oh,

What hand controller is used with this, and does anyone
know where one can be found?

Thanks again,
Mike


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Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5538712 - 11/25/12 01:08 PM Attachment (23 downloads)

The encoder out is for the Magellan DSC system. You'll note that the LX50 had provision for RA and Dec encoders, ST-4 autoguider and a electronic hand control. I've done some poking around and think that the LX50 used a subset of the LX200 protocol for the controller to PIC communications. The ETX EC (electronic controller) was a development of the LX50's unit. Also the ETX motor control boards (MCB) bear some semblance to the LX50's. In the DS2000 mounts the ETX's two MCBs have been reduced to one board. so there is a logical progression from the 826 mount's electronic to the LX50 and the later goto scopes.

The ETX electronic controller has quite a few features and it may be easier to install an ETX/DS MCB to your motor than get the old system working.

Here's the underside of the LX50:


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Carl Kolchak
Pooh-Bah
*****

Reged: 08/02/06

Loc: Northeast, Florida
Re: Help with a Meade DC drive new [Re: Geo.]
      #5538792 - 11/25/12 02:05 PM

Hi Mike,

I have a Meade 6" f/8 Starfinder EQ. I'm not sure but I think my DC motor is similar. Here are some images of the motor on the Starfinder 6" f/8:


Shows motor/assembly with cover removed


This shows the front of the motor cover with power switch and ra connector, etc


Detail inside of motor cover



Yellow square shows your fan like part. There is nothing filling in the little windows on that part.

peace & clear skies


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Geo.]
      #5539117 - 11/25/12 05:08 PM

Thank you George,

Thinking to get the controller to get it going correctly.
Maybe it's not even needed for tracking speed, just turn on (that would be ideal).
I'm thinking the controller would be for faster slewing speeds and not needed for casual viewing in the back yard.

I really appreciate the time you gave, and the great photos too,
Mike


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Carl Kolchak]
      #5539122 - 11/25/12 05:16 PM

Thank you Carl,

Great photos...
I appreciate your time too!
I'm going to put up another photo to show where the parts were placed, mine does not have two wheels, just one plus that other little window part.
I'll try to talk you out of your mount if I can't get this one going...I have lots of stuf to trade...LOL!

You guys are great,
Mike


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Carl Kolchak
Pooh-Bah
*****

Reged: 08/02/06

Loc: Northeast, Florida
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5539282 - 11/25/12 07:15 PM

Hi Mike,

The way my Meade DC motor works is I turn it on and it tracks whatever object I have in the EP.

The only controller that works for my EQ mount is a Magellan I or a Magellan II. I have installed the Magellan I.

Quote:

I'll try to talk you out of your mount if I can't get this one going...I have lots of stuf to trade...LOL!





I don't think I could be persuaded to trade off this mount, too happy with it.

peace & clear skies


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Carl Kolchak]
      #5539325 - 11/25/12 07:45 PM

Quote:

I don't think I could be persuaded to trade off this mount, too happy with it.




That's the main thing here, be happy...
Still gonna put up a couple pics with the remaining questions in a bit...

Always, Thanks,
Mike


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Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Help with a Meade DC drive new [Re: Michael Cave]
      #5540440 - 11/26/12 02:43 PM

Mine's AC. Just plug it in

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re:Please help with a Meade DC drive new [Re: Michael Cave]
      #5540488 - 11/26/12 03:15 PM

This is pulling up cobwebs from the memory bin, but I think the white paint on the encoder disc was intended to stop the slewing scope when it had traveled too far, i.e. to prevent the EQ mount from continuing until the OTA slammed into the mount. That would be roughly 90 degrees of travel on most EQ mounts, and it appears the white paint covers about that much in the way of "ticks".
However, like I said, this is trying to remember helping someone overhaul a mount 25 years ago.
George is the man if you need help on this.


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Michael Cave
sage
*****

Reged: 10/24/10

Loc: St. Louis, MO
Re: Help with a Meade DC drive new [Re: Geo.]
      #5543588 - 11/28/12 10:40 AM

Quote:

Mine's AC. Just plug it in




Thanks George,

Mine's DC (as you know) and will turn it on (hopefully this weekend).
Still going to get up a couple pics to show where the parts were placed by me...

Mike


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