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Gemini GTD E.Fric new mount or?

astrophotography equipment mount
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#51 Speppino

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Posted 08 May 2020 - 10:10 AM

This is part 2 of the same review...........

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#52 Speppino

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Posted 08 May 2020 - 10:11 AM

and finally part 3 with probably the most important part of the review........

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#53 ajaymandke

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Posted 09 May 2020 - 09:50 AM

The mount looks really interesting. Based on couple of reviews in this thread it seems to deliver on specs and can stand upto elements. No lubrication, no tweaking is great.

I have couple of questions and pardon my ignorance about friction drive mechanism:

 

1) Since the drive is very sensitive to imbalance, is there a software based utility to assist in balancing?

2) Also if the power is lost to the mount, is there a risk of OTA collision or are there any clutches to prevent it.

 

Thanks,

Ajay


Edited by ajaymandke, 09 May 2020 - 09:56 AM.


#54 GeminiGTD-Italy

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Posted 09 May 2020 - 10:06 AM

The mount looks really interesting. Based on couple of reviews in this thread it seems to deliver on specs and can stand upto elements. No lubrication, no tweaking is great.

I have couple of questions and pardon my ignorance about friction drive mechanism:

 

1) Since the drive is very sensitive to imbalance, is there a software based utility to assist in balancing?

2) Also if the power is lost to the mount, is there a risk of OTA collision or are there any clutches to prevent it.

 

Thanks,

Ajay

Hi, 

the mount has a clutch system that can fully disengage the drive, making balancing possible, as precise as it can be.

 

When the clutch is engaged, there is substantial resistance of the axes due to the permanent magnet of the stepper motors. This refers to the case when the motors are not powered. It is not like a direct drive mount that has close to zero torque without power.

 

András


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#55 ajaymandke

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Posted 09 May 2020 - 10:13 AM

Hi, 

the mount has a clutch system that can fully disengage the drive, making balancing possible, as precise as it can be.

 

When the clutch is engaged, there is substantial resistance of the axes due to the permanent magnet of the stepper motors. This refers to the case when the motors are not powered. It is not like a direct drive mount that has close to zero torque without power.

 

András

Thank you András,



#56 Gregory

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Posted 10 May 2020 - 12:22 PM

Hello all,

 

I am wondering -- why not use the Pulsar2 controller from the mount

manufacturer?  Is the OnStep controller superior in some way(s)?

 

Gregory



#57 GeminiGTD-Italy

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Posted 10 May 2020 - 12:32 PM

Hello all,

 

I am wondering -- why not use the Pulsar2 controller from the mount

manufacturer?  Is the OnStep controller superior in some way(s)?

 

Gregory

If you do not mind paying 1k EUR more for a few deg/sec higher slweing...why not. Pulsar2 misses sky modeling and the consequent tracking speed correction, although it allows applying corrections as continous offset in both RA and DEC, but someone (an interface) must calculate and send/update these values to Pulsar2.

András



#58 Speppino

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Posted 10 May 2020 - 01:18 PM

Onstep is just cheaper and open source. Not sure it is better then the Pulsar, it does not look like it either. But it does the job on budget and it does it good for now.
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#59 gotak

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Posted 10 May 2020 - 01:31 PM

And if you can code, you can make the changes or fixes you need yourself.
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#60 greg_gorr77

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Posted 14 May 2020 - 05:15 PM

Nico/Seppino,

Any more pics ?

#61 greg_gorr77

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Posted 25 May 2020 - 11:21 AM

Anyway, it looks like the guys are busy ….
I will make sure that I will give you more details about the mount as soon when I get it.
For now, I ve managed to order new counterweights SS309 - 2x 10kg, 1x 5kg, 1 x 3kg.Also, after talking with Berlebach (Marion A++++++),
we've come up with an ideal adaptor for the mount and their tripod Planet,

I have 18volt 3AMP wall charger - as advice from Gemini,
I have few quotes coming for Peli cases...and the last,
I am researching the Gemini recommendation for the controller - OneStep,
also Pulsar 2 as it is more than capable enough to work with it...

#62 nico974

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Posted 26 May 2020 - 06:16 AM

Hi,

 

sorry, no more pics for the moment. The weather here is really bad and I'm gone be father in few days, so I think I won't have lots of time for it after lol.gif 
Nice greg, sure you will love it !
Hope that you will have better skies than me those times ...

 

nico

 



#63 lillo78d

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Posted 26 May 2020 - 10:24 AM

Hi, I contacted insten.eu, and I purchased the control unit plus the bluetooth system, for a couple of days, and I communicated it to them via two emails Vankarem77@gmail.com and through another email that they gave on the site insten .eu @ and then I don't remember, but they don't give any answer, it turns out that they don't contact, and they don't communicate to the e-mails?, because if the payment with paypal was collected,'m sorry for my English , I'm Italiangrin.gif



#64 Speppino

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Posted 26 May 2020 - 10:34 AM

Hi, I contacted insten.eu, and I purchased the control unit plus the bluetooth system, for a couple of days, and I communicated it to them via two emails Vankarem77@gmail.com and through another email that they gave on the site insten .eu @ and then I don't remember, but they don't give any answer, it turns out that they don't contact, and they don't communicate to the e-mails?, because if the payment with paypal was collected,'m sorry for my English , I'm Italiangrin.gif



#65 Speppino

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Posted 26 May 2020 - 10:36 AM

Hi Lillo78D,
Indeed instein is very slow to answer and sometimes he might seem not responsive at all. But you will eventually get it.
Good luck.

#66 greg_gorr77

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Posted 26 May 2020 - 12:30 PM

Hi Lillo78D,
Indeed instein is very slow to answer and sometimes he might seem not responsive at all. But you will eventually get it.
Good luck.

That is not a good news, specially that this new mount needs total/full support and customer service from the controller manufacture... Hopefully this is only temporary...

Edited by greg_gorr77, 27 May 2020 - 02:34 AM.


#67 greg_gorr77

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Posted 26 May 2020 - 12:37 PM

...I'm gone be father in few days,  
 
nico


What's the name? - is it going to be : 111 from Messier Catalogue?smile.gif)))
Congrats smile.gif))

Edited by greg_gorr77, 27 May 2020 - 01:36 AM.


#68 greg_gorr77

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Posted 27 May 2020 - 05:40 PM

...so after very busy day I got several replies - all positive - regarding the OnStep. Current pandemic didn't help and there is significant staff shortage.
All will be back in line very soon.


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