Hi Terry,
I have same question and struggle with my gemini.
Which value should i need to add in western goto limit on Gemini I ??
Regrds
Noel

My bad. I forget people here can and often are not here in the USA.?


--

Chip Louie Chief Daydreamer Imagination Hardware?

? ?Astrospheric Weather for Imagers - Click on my sig!

If in UK David is closest but I ask why do you think it’s an EEPROM ?

Yes they can go faulty but it’s kinda rare?
Cheers
--
Brendan

开云体育

David

UK - you have repaired my units before - just change the serial port on oine and replaced the power switch no my spare unit...? I shall call you

Regards

Mark

开云体育

On Tue, Jan 23, 2024 at 09:47 AM, madastro wrote:

Hi - I have a Gemini 1 L4 v1.05 unit that seems to be having eprom issues.? Luckiiy I have a spare control panel that works fine.? Where can I buy a replacement eprom for my faulty unit?
Regards
Mark

?Mark,

What is the control panel? Do you mean the Gemini 1 controller board in the metal case or the Hand Controller? If you mean the main circuit board in the Gemini 1 metal case you may be better off contacting Michael Herman and discussing how you diagnosed the EPROM as the issue. Michel is a Gemini 1 component level repair expert and has seen every it all and will know what the problem is.? ??


--

Chip Louie Chief Daydreamer Imagination Hardware?

? ?Astrospheric Weather for Imagers - Click on my sig!

Hi - I have a Gemini 1 L4 v1.05 unit that seems to be having eprom issues.? Luckiiy I have a spare control panel that works fine.? Where can I buy a replacement eprom for my faulty unit?
Regards
Mark

That's a fair statement.? 8^)

--

Chip Louie Chief Daydreamer Imagination Hardware?

? ?Astrospheric Weather for Imagers - Click on my sig!

On Wed, Jan 17, 2024 at 01:30 PM, Chip Louie wrote:

It may well be that I am biased, Brendan's proven depth of knowledge is like the proverbial rabbit hole. But in my defense Michael H. drives by my house on a regular basis and we do lunch once in a while LOL.? ?

To be fair, it's a much longer drive for Brendan to drive by your house ;)

On Tue, Jan 16, 2024 at 01:08 PM, David C. Partridge wrote:

FWIW I honestly think that accolade belongs to Brendan Smith…

?

David

?

?

?

From: [email protected] <[email protected]> On Behalf Of Chip Louie
Sent: 16 January 2024 19:27
To: [email protected]
Subject: Re: [Gemini_users_io] Gemini 1, NINA, Meridian Flip Mount Disconnect

?

madastro,

Michael Herman is the ultimate Gemini 1 hardware debugger.?

It may well be that I am biased, Brendan's proven depth of knowledge is like the proverbial rabbit hole. But in my defense Michael H. drives by my house on a regular basis and we do lunch once in a while LOL.? ?

--

Chip Louie Chief Daydreamer Imagination Hardware?

? ?Astrospheric Weather for Imagers - Click on my sig!

开云体育

The G-1 manual says 9800, N, 8, 1 If your comm port settings are wrong, strange things will happen.? Usually when a Micro communicates with an RS232 chip, it will control the data starting and stopping so that buffers in the Micro don't overflow.
-Will

madastro,

Michael Herman is the ultimate Gemini 1 hardware debugger.? The older Gemini 1 boards often have issues with their I/O ports as they are not protected and sometimes are damaged while being connected incorrectly or through static discharge. Being fairly old now many have had experiences that have caused them to develop issues at their I/O ports. The issue as I understand it the serial I/O chips are basically connected directly to the ports which leaves them very vulnerable to this sort of sneaky damage. Mike probably replaced the RS232 I/O ICs and may have done other mods to improve the Gemini 1 ports and power supply.?

That said I think NINA has a high rate of data going back and forth between NINA and Gemini and this amount of traffic can overcome the speed of the Gemini 1 I/O processing which then corrupts the data and can cause issues because the position and data don't match up. I think this was part of the issue found while the Gemini 2 Level 6 firmware was being developed and one of the issues that was resolved to eliminate the small mount moves post plate solving to prevent what appeared as a run-a-way mount situation.?

Anyway BEFORE you email Mike Herman verify your USB to RS232 converter and cable are handshaking 100% correctly otherwise nothing will solve the issue. This is a kind of tricky thing to determine unless you are a hardware software person from the olden days like Mike and I are LOL. If not just email him and see what he suggests.?
?

--

Chip Louie Chief Daydreamer Imagination Hardware?

? ?Astrospheric Weather for Imagers - Click on my sig!

I have this exact same issue. ?What did Michael do to correct the issue?

Thanks everyone for your help. I also got a nice email reply from Michael Herman, who has kept my 16 year old Losmandy Gemini-1 functioning quite well. He really knows electronics, especially the Gemini chassis.

All the Best,
Russ

Page 6 of G1 manual.....see menu G1 Lvl4

['The telescope can be parked at any "Home Position" by either the hand controller or
serial control. The home position defaults to the CWD (Counterweight Down) position.
Additional commands have been added to the QuickMenu to provide additional parking
options and to stop tracking.']

Remember home may still move at sidereal when it stops ensure this does not happen or power off?

--
Brendan

Hi Russell,

I am not familiar with gemini-1 but you can absolutely use a different position to park your mount. With G-2 you simply slew the mount to your chosen position and set that as your new home position. When you’re done observing simply tell the mount to park at home. The advantage of this is you can keep your sky model if you build one. Simply use warm restart when starting your mount, slew to a bright star and sync on it. I am sure the procedure for G-1 is similar. Also, there’s a manual for the g-1 out there somewhere, just do a google search for “losmandy gemini manual” (I’m pretty sure it’s in the losmandy website). You might want to give it a glance :)

Someone else more familiar will likely chime in

Good luck
Jonathan

Is it possible to set home position other than counterweight down for a 2008 G11, Gemini-1? I am planning for a slide off roof observatory for my Losmandy G11 and Celestron-11. Having a home position with counterweight shaft horizontal and telescope pointed south will help keep wall height of the observatory to a minimum.

Thanks,
Russ