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Re: G11 Dec Axis, How Tight to Do Up Clutch Knob

 

¿ªÔÆÌåÓý

Well it was once in 14 months for an hour with 2000ms backlash comp and I can¡¯t do it again. I think I know what to try next.

?

Just thought now re RA axis on the G11GT. So if the answer on Dec is ¡°the looser the better, but not loose enough to slip¡± ¨C what about the RA ??

?

Tight as possible or same answer as for Dec ??

?

Thanks

?

From: [email protected] <[email protected]> On Behalf Of Brian Valente via groups.io
Sent: Friday, 15 May 2020 11:54 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] G11 Dec Axis, How Tight to Do Up Clutch Knob

?

Boy 0.46" guiding isn't anything to sneeze at, nice job

?

I'm not sure where you are on guiding, but if you wanted a complete review, i'm over at the PHD forums helping out and often recommend establishing a baseline guiding?

?

I have recently gotten my G11T back, and if I recall correctly, i did something like PEC for just the primary PE and then focused my PPEC guiding algorithm on one of the shorter periods (i want to say 41 seconds? something like that) which seemed to be pretty effective

?

?

?

On Thu, May 14, 2020 at 8:33 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:

Thanks Brian and congratulations on your new role.

?

My struggles continue, completely frustrated and its now almost a year and a half. Every night it¡¯s a different result and pretty much never a good one.

?

Attached is a couple of nights ago, best I¡¯ve ever achieved, it lasted a hour or so and then deteriorated ¨C and this was from the backyard. Also had a fresh PempPro PEC in place.

?

Next night, couldn¡¯t do it again.

?

Anyway, the point of interest is to achieved this, PHD backlash compensation was on and at 2000 ms.

?

Regards Richard

?

From: [email protected] <[email protected]> On Behalf Of Brian Valente via
Sent: Friday, 15 May 2020 11:01 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] G11 Dec Axis, How Tight to Do Up Clutch Knob

?

Hi Richard

?

in my experience, the looser the better, but not loose enough to slip.?

?

Good axis balancing really helps here?

?

On Thu, May 14, 2020 at 7:46 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:

Hi All

I have a G11GT. If I screw up the Dec clutch knob to be tight, basically the worm crown wheel will no longer turn, all jammed up. From "tight" I turn the clutch knob back by a third to half a turn to free up the worm crown gear.

At this point I find the clutch to be susceptible to slip, already have neoprene infused cork clutch pad in there.

Is this correct / normal ???

Much appreciated, regard Richard


?

--

Brian?

?

?

?

Brian Valente

portfolio

This e-mail and any files attached are intended solely for the use of the addressee. They may contain privileged or confidential information. If you are not the intended recipient, you are hereby notified that any use, disclosure, copying or distribution of this e-mail is strictly prohibited. If you receive this message in error, please notify the sender immediately and delete the message and any attachments from your system. Thank you.


?

--

Brian?

?

?

?

Brian Valente

portfolio

Re: G11 Dec Axis, How Tight to Do Up Clutch Knob

 

Boy 0.46" guiding isn't anything to sneeze at, nice job

I'm not sure where you are on guiding, but if you wanted a complete review, i'm over at the PHD forums helping out and often recommend establishing a baseline guiding?

I have recently gotten my G11T back, and if I recall correctly, i did something like PEC for just the primary PE and then focused my PPEC guiding algorithm on one of the shorter periods (i want to say 41 seconds? something like that) which seemed to be pretty effective



On Thu, May 14, 2020 at 8:33 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:

Thanks Brian and congratulations on your new role.

?

My struggles continue, completely frustrated and its now almost a year and a half. Every night it¡¯s a different result and pretty much never a good one.

?

Attached is a couple of nights ago, best I¡¯ve ever achieved, it lasted a hour or so and then deteriorated ¨C and this was from the backyard. Also had a fresh PempPro PEC in place.

?

Next night, couldn¡¯t do it again.

?

Anyway, the point of interest is to achieved this, PHD backlash compensation was on and at 2000 ms.

?

Regards Richard

?

From: [email protected] <[email protected]> On Behalf Of Brian Valente via
Sent: Friday, 15 May 2020 11:01 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] G11 Dec Axis, How Tight to Do Up Clutch Knob

?

Hi Richard

?

in my experience, the looser the better, but not loose enough to slip.?

?

Good axis balancing really helps here?

?

On Thu, May 14, 2020 at 7:46 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:

Hi All

I have a G11GT. If I screw up the Dec clutch knob to be tight, basically the worm crown wheel will no longer turn, all jammed up. From "tight" I turn the clutch knob back by a third to half a turn to free up the worm crown gear.

At this point I find the clutch to be susceptible to slip, already have neoprene infused cork clutch pad in there.

Is this correct / normal ???

Much appreciated, regard Richard


?

--

Brian?

?

?

?

Brian Valente

portfolio

This e-mail and any files attached are intended solely for the use of the addressee. They may contain privileged or confidential information. If you are not the intended recipient, you are hereby notified that any use, disclosure, copying or distribution of this e-mail is strictly prohibited. If you receive this message in error, please notify the sender immediately and delete the message and any attachments from your system. Thank you.



--
Brian?



Brian Valente
portfolio

Re: G11 Dec Axis, How Tight to Do Up Clutch Knob

 

¿ªÔÆÌåÓý

Thanks Brian and congratulations on your new role.

?

My struggles continue, completely frustrated and its now almost a year and a half. Every night it¡¯s a different result and pretty much never a good one.

?

Attached is a couple of nights ago, best I¡¯ve ever achieved, it lasted a hour or so and then deteriorated ¨C and this was from the backyard. Also had a fresh PempPro PEC in place.

?

Next night, couldn¡¯t do it again.

?

Anyway, the point of interest is to achieved this, PHD backlash compensation was on and at 2000 ms.

?

Regards Richard

?

From: [email protected] <[email protected]> On Behalf Of Brian Valente via groups.io
Sent: Friday, 15 May 2020 11:01 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] G11 Dec Axis, How Tight to Do Up Clutch Knob

?

Hi Richard

?

in my experience, the looser the better, but not loose enough to slip.?

?

Good axis balancing really helps here?

?

On Thu, May 14, 2020 at 7:46 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:

Hi All

I have a G11GT. If I screw up the Dec clutch knob to be tight, basically the worm crown wheel will no longer turn, all jammed up. From "tight" I turn the clutch knob back by a third to half a turn to free up the worm crown gear.

At this point I find the clutch to be susceptible to slip, already have neoprene infused cork clutch pad in there.

Is this correct / normal ???

Much appreciated, regard Richard


?

--

Brian?

?

?

?

Brian Valente

portfolio

This e-mail and any files attached are intended solely for the use of the addressee. They may contain privileged or confidential information. If you are not the intended recipient, you are hereby notified that any use, disclosure, copying or distribution of this e-mail is strictly prohibited. If you receive this message in error, please notify the sender immediately and delete the message and any attachments from your system. Thank you.

Re: G11 Dec Axis, How Tight to Do Up Clutch Knob

 

Hi Richard

in my experience, the looser the better, but not loose enough to slip.?

Good axis balancing really helps here?

On Thu, May 14, 2020 at 7:46 PM Richard Triglavcanin <richard.triglavcanin@...> wrote:
Hi All

I have a G11GT. If I screw up the Dec clutch knob to be tight, basically the worm crown wheel will no longer turn, all jammed up. From "tight" I turn the clutch knob back by a third to half a turn to free up the worm crown gear.

At this point I find the clutch to be susceptible to slip, already have neoprene infused cork clutch pad in there.

Is this correct / normal ???

Much appreciated, regard Richard



--
Brian?



Brian Valente
portfolio

G11 Dec Axis, How Tight to Do Up Clutch Knob

 

Hi All

I have a G11GT. If I screw up the Dec clutch knob to be tight, basically the worm crown wheel will no longer turn, all jammed up. From "tight" I turn the clutch knob back by a third to half a turn to free up the worm crown gear.

At this point I find the clutch to be susceptible to slip, already have neoprene infused cork clutch pad in there.

Is this correct / normal ???

Much appreciated, regard Richard
gm-8 opw upgrade advice

 
Edited

Hi all! new member here :)

I have a gm-8 with stepper motors and soft plastic covers, non-gemini. I purchased last week two new one-piece worm blocks and tried to install them but I run into an issue:
The hardware included to attach the motors does not work on the stepper motors that I have ... Upon closer inspection it seems that I received the Losmandy part "opw-8/w-orig" instead of the "opw-8/w"
The opw-8/w-orig I received has an end plate to attach the motors, while with the opw-8 (that I expected) the motors attach to the mount directly.

I have read that the opw-8/w-orig is probably a better choice, however, I can't attach my motors with it (standoffs and studs are the wrong size, and the old ones do not fit on the end plate). If anyone has seen this issue or has any advice I will be very grateful. Thanks!

Santiago
Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 

It's helpful input, thanks Glen


On Thu, May 14, 2020 at 9:41 AM glnth <IDEAL18@...> wrote:
Brian
I don't know if it will help with your zoom session?
Please let me know if that is what you would like or if something else.
I'm a little clueless on these things.
Thank you
Glen
??



--
Brian?



Brian Valente
portfolio

Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 

Brian
I don't know if it will help with your zoom session?
Please let me know if that is what you would like or if something else.
I'm a little clueless on these things.
Thank you
Glen
??
Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 

Hi Glen

ah okay. got it. that's fine.?

you posted specific questions a couple times, so i didn't know if you were looking for answers to them



On Thu, May 14, 2020 at 5:04 AM glnth <IDEAL18@...> wrote:
These are questions for the up coming zoom session on guiding.

I can only show you questions that I have. So you can hear from at least one perspective.
I can be more generic on the questions but I figure it would just add to more questions.
Or are you going in another direction?

Glen?



--
Brian?



Brian Valente
portfolio

Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 

These are questions for the up coming zoom session on guiding.

I can only show you questions that I have. So you can hear from at least one perspective.
I can be more generic on the questions but I figure it would just add to more questions.
Or are you going in another direction?

Glen?
Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 


Hi?glnth

Can you start a separate thread if you want answers to those specific questions (which I'm happy to do)

this thread is really for input on an upcoming zoom session on guiding

thanks

On Wed, May 13, 2020 at 9:07 PM glnth <IDEAL18@...> wrote:

[Edited Message Follows]

On Sun, May 10, 2020 at 08:22 PM, Brian Valente wrote:
1. Not sure my results are good (or good enough).
2 .I'm running an OAG, does focal length change your rms in PHD??
Shooting with 335 & 1626 focal length. The rms seems to be better on the shorter f/l, but is it?

3. I hear that at 1.0 or less total RMS is good enough for astro photo.
? ?Is that true?

Some one in the forum said that loosening up on the dec and ra clutch knobs helped tracking.
I tried it and it seemed to help but I haven't tracked enough to say for sure or if I want it to be.
My tracking on dec was a lot better than ra but after loosening up, ra is better then dec. Did I go to loose on dec?
It almost seems there is two settings on the clutch knobs. One for visual ( tighter) to stop pushing on the mount through the eye piece. And another for photo to (lighter) help with tracking.??

When I had the motor off, I would turn the gears like you were adjusting the worm gear with the scope and everything on the mount, to check the balance.?
The mount would jerk if the weight was to light.
4. Does balance affect tracking, east and change when tracking west very much?



--
Brian?



Brian Valente
portfolio

Re: What's wrong with this mount? Help please .

 

¿ªÔÆÌåÓý

Hi Sebastian

?

Lots of info coming your way.

?

Just to add to John¡¯s comments. Default RA is 70 and Hys 10.? Your RA Osc is very low and PHD manual suggest 0.30 to 0.35. To increase RA Osc they say increase RA Agg and or decease Hys.

?

So I would suggest you first increase Agg to 70 and leave Hys at 10. Then try more Agg of 75 or 80. After that decide on increasing or deceasing Hys. Try to get a better RA Osc number.

?

Cheers Richard

?

From: [email protected] <[email protected]> On Behalf Of John Kmetz via groups.io
Sent: Thursday, 14 May 2020 9:32 AM
To: [email protected]
Subject: Re: [Losmandy_users_io] What's wrong with this mount? Help please .

?

Sebastion:

Perhaps a couple of suggestions you can try:

Have you done anything with periodic error correction? If you don't have PEMPro you can download it and use it free for like a month. More than enough time to analyze your PE and send a correction curve to the mount.

Try increasing your correction pulses from 2500 to 3200. Multiple pulses show not enough movement is occurring.

Try increasing your RA aggression to 75 or 80 and your Hysteresis to 20. Increasing the latter often smooths the corrections into shorter but larger pulses, learning from past behavior.

Cut exposures from 4 to 1 to 2 seconds so corrections are made more often. Also try turning off the dithering until you try a few adjustments.?

Click on the brain to make sure you are using the right focal length, etc. Sometimes I have forgotten this when changing rigs. Also a new darks library is needed if you changed guiding cams.

Hope some of the above help. Perhaps you have already tried a few or all of these.

Good luck!

John

This e-mail and any files attached are intended solely for the use of the addressee. They may contain privileged or confidential information. If you are not the intended recipient, you are hereby notified that any use, disclosure, copying or distribution of this e-mail is strictly prohibited. If you receive this message in error, please notify the sender immediately and delete the message and any attachments from your system. Thank you.

Re: What's wrong with this mount? Help please .

 

Sebastion:

Perhaps a couple of suggestions you can try:

Have you done anything with periodic error correction? If you don't have PEMPro you can download it and use it free for like a month. More than enough time to analyze your PE and send a correction curve to the mount.

Try increasing your correction pulses from 2500 to 3200. Multiple pulses show not enough movement is occurring.

Try increasing your RA aggression to 75 or 80 and your Hysteresis to 20. Increasing the latter often smooths the corrections into shorter but larger pulses, learning from past behavior.

Cut exposures from 4 to 1 to 2 seconds so corrections are made more often. Also try turning off the dithering until you try a few adjustments.?

Click on the brain to make sure you are using the right focal length, etc. Sometimes I have forgotten this when changing rigs. Also a new darks library is needed if you changed guiding cams.

Hope some of the above help. Perhaps you have already tried a few or all of these.

Good luck!

John
Re: motor cable

[email protected]
 

Losmandy informed me that the G11 motor cable is wired "reverse."? I bought a 6pin phone cable wired "straight" thru (not reversed), and this cable works !
This is a G11 mount only, NOT Gemini.? Is it possible the motor cable configuration is different for Gemini, than for G11 NO Gemini ?
Very curious.? ?Thanks.
--
Dean
Re: Gemini Hand Controller Mount

 

Thanks everyone?
Re: DEC looseness

 

Hi Steve

Is this setup correctly? according to your settings your guider resolution is 30.5"/pixel?

the guide and debug logs would help here

On Wed, May 13, 2020 at 1:35 PM Steve Elmore via <gizmo_s67=[email protected]> wrote:
Brian,

Those were before I made any adjustments.? Here are the screen shots from after the adjustments and drift alignment.? Which numbers are the important ones?

Steve



--
Brian?



Brian Valente
portfolio

Re: DEC looseness

 

Brian,

Those were before I made any adjustments.? Here are the screen shots from after the adjustments and drift alignment.? Which numbers are the important ones?

Steve
Re: What's wrong with this mount? Help please .

 

Hello Friends,

I have a very light setup: TS 50/330 with flattener and Canon 1100D side by side with ASI min guider scope and ASI 120MM. It weights nothing. I have a shortened counterweight bar and a SW 0,8 kg counterweight. My mount is GM8 with Gemini 2 with high precision worm and hight torque motors. As I said before, a did a polar alignment with a polemaster and sharpcap. Guiding assistant showed PA error 0,7. Before making a phd calibration I removed any dec backlash pressing north for a few seconds. After that I did a calibration close to a meridain and equator crossing on the east side. My balance was biased towards the counterweight. 4 or 2 sec guiding capture time didnt make any difference. RA axis was going smooth and sudenly hills and mountains. I dont have any backlash. In fact I think that my worm and worm gear are to tight, and maybe thats an issue.I have just stripped the RA axis and try to clean it and regrease with superlube. Below is a picture of my Celestron CG5 mount tracking with the same scope on it. You can compare.
Re: Power GM8 Gemini 1

 

Hello, I have one of Michael Hermans voltage pumps and it works great. I would recommend it highly.
HAPPY SKIES Deric
Re: 2 questions for you: Guiding as the next Losmandy Zoom Meetup topic

 
Edited

On Sun, May 10, 2020 at 08:22 PM, Brian Valente wrote:
1. Not sure my results are good (or good enough).
2 .I'm running an OAG, does focal length change your rms in PHD??
Shooting with 335 & 1626 focal length. The rms seems to be better on the shorter f/l, but is it?

3. I hear that at 1.0 or less total RMS is good enough for astro photo.
? ?Is that true?

Some one in the forum said that loosening up on the dec and ra clutch knobs helped tracking.
I tried it and it seemed to help but I haven't tracked enough to say for sure or if I want it to be.
My tracking on dec was a lot better than ra but after loosening up, ra is better then dec. Did I go to loose on dec?
It almost seems there is two settings on the clutch knobs. One for visual ( tighter) to stop pushing on the mount through the eye piece. And another for photo to (lighter) help with tracking.??

When I had the motor off, I would turn the gears like you were adjusting the worm gear with the scope and everything on the mount, to check the balance.?
The mount would jerk if the weight was to light.
4. Does balance affect tracking, east and change when tracking west very much?
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