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Re: Restarting Gemini2
>>Note that first Align to Bright Star does not actually change any Model setting from zero value.? That first Alignment only sets the encoder positions to the Gemini...really it is doing a Synch. Michael - is that how it works on Gemini I?? i just tested this on Gemini II and the first align gives me a DEC and RA offset, which is what I expected On Tue, Aug 25, 2020 at 11:25 AM Michael Herman <mherman346@...> wrote:
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Brian? Brian Valente portfolio |
Re: Gear lash adjustments on my G11t
Hi Jeff The spring loaded worm is a different kind of animal. it's not going to behave in the same way as regular geared worm/worm wheel meshing. The spring needs a certain amount of flex to move, so if you are moving it, may will appear as though it has more backlash than "it should". PHD may also report excessive backlash in its measurements if you use the guiding assistant.? In practice, when you guide, it will likely end up being a very reasonable amount and guide quite well. Spring-loaded worm looks a bit odd in regarding traditional gearing assessment Regarding the 90 degrees vs 270, there is a certain amount of mechanical imperfection, so that could be it. But it's hard to know from just a description, you are there next to it. If you are adjusting the DEC worm, the spring-loaded part has a different adjustment than a regular one: (i skipped to the part where it is just the adjustment: the prior parts are more for completely resetting the worm which you shouldn't need to do) On Tue, Aug 25, 2020 at 9:57 AM jeff marston <jeffmarston@...> wrote:
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Brian? Brian Valente portfolio |
Re: Restarting Gemini2
Hi Ron, Like Jamey just said, when I have some pointing trouble, I do a Park at CWD, then shut off the Gemini power. Then I set up the CWD position:?? I loosen the RA clutch.? I then use a "torpedo" bubble level, to?put the counterweight bar horizontal, getting that level, moving the RA setting circles to something convenient, then rotating?back 90 degrees to get the counterweight bar vertical again.? ?I then retighten the RA clutch knob. Then I loosen the DEC clutch knob, and rotate the scope to be horizontal.? Then use the level to get the dovetail level, then use the setting circles again to move that back to CWD position pointing the scope toward Polaris.? Then retighten the DEC axis. Then I power back on the Gemini using a Cold Boot.? That erases all possibly messed up Model values back to zero.? Then I double check the UTC time and location information.? At that point, my GoTos are normally quite accurate.? I then do a 1 star Alignment. Note that first Align to Bright Star does not actually change any Model setting from zero value.? That first Alignment only sets the encoder positions to the Gemini...really it is doing a Synch. You can then Add Align points if you wish. Give that a try. I would not leave the Gemini powered on all the time, it is not necessary from the way it was designed, using the internal RTC device to keep the time counted, and using the SRAM to keep the location and other information in storage.?? Some other ideas to evaluate:? ? I have not tried Park at Custom point, which I think is what you are doing to park with the counterweights horizontal.? In theory it should work.?? However, I would do the?Cold Boot with the Gemini not connected to the PC/laptop.? I would check to see if Gemini.net has "set Time/Date on Connect" checked off, and uncheck that.? I suggest you try and see if somehow those in Gemini.net are somehow? over-riding the internal Gemini settings, and messing up your Park/Unpark operation.? These are just some thoughts, but worth a few quick experiments to see if that PC to Gemini interaction might be causing trouble.?? Best of luck, Michael On Tue, Aug 25, 2020 at 10:50 AM Jamey Jenkins <jameyljenkins@...> wrote:
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simple servo motor control
Hi all. I have an RA/base assembly of the GM8 ( I bought from someone upgrading to the g11 RA assembly). I want to use for my solar scope. I only have the older servo motor and gearbox but no controller. Is there a simple way to run this servo from an arduino board? I don't need anything like goto or even accurate tracking. Just want to get the speed close enough to keep the sun in the eyepiece. Alternately, if anyone has a spare stepper motor to sell, that would make things easier as I have an OnStep controller already.?
I thought about using a nema stepper but having a hard time finding a flexible shaft coupler with a small enough OD. I don't really want to mill out the plate but I could. Just want to try something simple.? Thanks, JoAnn.? |
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
Thanks, Brian. It does help. My new mount has far less play than my old CGEM mount, but a tiny bit more than my CGX-L. I can send a little video of the Dec movement and sound.?
Between the moon and smoke from fires all over the west I won't be doing any auto guiding, for a while, so I guess there isn't a big rush.?Have a great day.
Jeff
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Tuesday, August 25, 2020 8:53 AM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
if you can get an audio uploaded (or we can do a zoom or something else later today) we can figure out if the sound is a problem
Regarding play in the axis, your new G11T has a spring-loaded DEC axis, so there is going to be apparent play in there, which is really room for the spring to operate.?
There may be play in the RA, it shouldn't be much. I have noticed when folks move the bottom of the counterweight shaft?to check, it amplifies any movement so it seems like a lot. In practice, RA is always moving in one direction, never reverses so any
play there won't impact your mount performance.
hope that helps
Brian
On Mon, Aug 24, 2020 at 9:13 PM jeff marston <jeffmarston@...> wrote:
Brian?
Brian Valente
portfolio
|
Re: Restarting Gemini2
Hi Ron If you warm start from CWD, try a goto and sync on the first target. that should sync your existing model with real-world Brian On Tue, Aug 25, 2020 at 10:31 AM Rappnron via <Rappnron=[email protected]> wrote: I have now have a ROR for my G 11 G on Its tripod And I am having problems with restarting Gemini 2 back on --
Brian? Brian Valente portfolio |
Re: Restarting Gemini2
I do a cold start with CWD every time and do a modeling. Pier mounted too... Jamey On Tue, Aug 25, 2020, 1:31 PM Rappnron via <Rappnron=[email protected]> wrote: I have now have a ROR for my G 11 G on Its tripod And I am having problems with restarting Gemini 2 back on |
Restarting Gemini2
I have now have a ROR for my G 11 G on Its tripod And I am having problems with restarting Gemini 2 back on
My problem is when I restart I am not getting a good initial goto so my question is - what is the best way to shut down and restart? so far my technique has been move to the park position which is RA and dec horizontal and then I shut off electricity. But when I return I do a warm start never seems to be pointing at the correct target? What is the correct workflow ? Should I leave the mount turned on All of the time instead?? Any other suggestions? what are you guys doing? Ron |
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
Brian,
I was wondering how much play the Dec was supposed to have. I have rotated the Dec though 360 degrees several times. It is tight and noisier through 90 degrees. 270 degrees of the
arc, the Dec is much quieter, and It start to get some play opposite the tight part of the arc. It seems that someone could adjust the worm gear all day and not get it uniform, if there are
tight and loose arcs. Just wondering what I should do about that, or if it matters that there is gear lash through some of the circle. I assumed that there wasn't supposed to be any loose
movement in the saddle.
Jeff
From: [email protected] <[email protected]> on behalf of jeff marston <jeffmarston@...>
Sent: Monday, August 24, 2020 10:13 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Brian,
Thanks?for getting?back to me about this. I am hoping we can start over.?
I did find a battery that puts out 16 volts. It powers the Dec through the range of motion without warning messages, but it still gets quite noisy. This was without a load.
I haven't tried the higher voltage battery with the RA yet.?
I suppose I did get the assumption that the mount needed adjustment, because the motors stalled out the?first
time I tried using the mount.?
I have never heard a mount actually, ?squeal, before, but I have repaired cars and rebuilt motorcyles, so I am familiar with mechanical sounds and squealing?usually
precedes something breaking or stopping. The mount seems to work otherwise. I would like to know if there is supposed to be some play in the Dec and RA with Losmandy mounts. My CGX-L mount has none, so I am puzzled about that. I am sure we can figure this
out. Have a good evening,?Brian.
Jeff
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Monday, August 24, 2020 9:13 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
My apologies - that wasn't my intention at all, so please let me try again:?
Most importantly is getting your mount running to your satisfaction. I'm super glad people are helping you here.
IF you need to adjust it, I 100% can help.?
All i was?trying to suggest (maybe not so great) is don't *start* with the assumption you *need* to adjust your mount.?
I only said run it and see how it performs. And we can determine what needs to happen from there. I have helped many people to get their mounts up and running. Many times I'm helping them back out the changes they made because those changes degraded their
performance.?
You asked if we took the time to adjust these mounts prior to leaving the factory, and yes, I watch Scott do this all the time and with great attention to detail for each mount. I'm just relating the confidence I have in how the mount was adjusted and
left the shop. I assume you want to take advantage of that care.??
If you are concerned about the noise, a video with audio (or audio) could help answer that very quickly.
Michael's battery voltage converter is an excellent choice as well
Whatever else comes up, this is a great group of folks and I'm happy to help as well (here or via tech support)
Brian
On Mon, Aug 24, 2020 at 7:57 PM jeff marston <jeffmarston@...> wrote:
Brian?
Brian Valente
portfolio
|
Re: No meridian flip while tracking?
Hi Henry Yes you can do meridian flips with your Titan. This is a feature of - and controlled by - Maxim DL. I personally don't use Maxim so I can't tell you how it works, but I do meridian flips all the time with Sequence Generator Pro and my G11.? Maybe someone here uses?Maxim, or you can try asking on the Maxim user group? On Tue, Aug 25, 2020 at 8:41 AM Henry Sipes via <henry.sipes=[email protected]> wrote: Did I read this correctly?? I thought Maxim DL 6.0 would allow one to track and photograph until the mount reached the set flip limits, flip, require target (using pinpoint), and continue on with imaging.? However, I have yet to get this to work.? I read in some other threads here that the mount stops when it reaches the safety limits.? That is exactly what happens to my Titan everytime.? I checked all the autoflip boxes etc. but nothing happens.? When it reaches the safety limits the MaximDL software starts giving errors. --
Brian? Brian Valente portfolio |
No meridian flip while tracking?
Did I read this correctly?? I thought Maxim DL 6.0 would allow one to track and photograph until the mount reached the set flip limits, flip, require target (using pinpoint), and continue on with imaging.? However, I have yet to get this to work.? I read in some other threads here that the mount stops when it reaches the safety limits.? That is exactly what happens to my Titan everytime.? I checked all the autoflip boxes etc. but nothing happens.? When it reaches the safety limits the MaximDL software starts giving errors.
Is there some document somewhere that walks someone through how to get MaximDL 6.0 to flip while imaging, reaquire the target, and continue imaging?? Or did I must imagine this was possible in some dream. Thanks, |
Re: Gear lash adjustments on my G11t
Hi Jeff if you can get an audio uploaded (or we can do a zoom or something else later today) we can figure out if the sound is a problem Regarding play in the axis, your new G11T has a spring-loaded DEC axis, so there is going to be apparent play in there, which is really room for the spring to operate.? There may be play in the RA, it shouldn't be much. I have noticed when folks move the bottom of the counterweight shaft?to check, it amplifies any movement so it seems like a lot. In practice, RA is always moving in one direction, never reverses so any play there won't impact your mount performance. hope that helps Brian On Mon, Aug 24, 2020 at 9:13 PM jeff marston <jeffmarston@...> wrote:
--
Brian? Brian Valente portfolio |
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
Brian,
Thanks?for getting?back to me about this. I am hoping we can start over.?
I did find a battery that puts out 16 volts. It powers the Dec through the range of motion without warning messages, but it still gets quite noisy.
This was without a load. I haven't tried the higher voltage battery with the RA yet.?
I suppose I did get the assumption that the mount needed adjustment, because the motors stalled out the?first
time I tried using the mount.?
I have never heard a mount actually, ?squeal, before, but I have repaired cars and rebuilt motorcyles, so I am familiar with mechanical
sounds and squealing?usually precedes something breaking or stopping. The mount seems to work otherwise. I would like to know
if there is supposed to be some play in the Dec and RA with Losmandy mounts. My CGX-L mount has none, so I am puzzled about that. I am sure we can figure this out. Have a
good evening,?Brian.
Jeff
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Monday, August 24, 2020 9:13 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
My apologies - that wasn't my intention at all, so please let me try again:?
Most importantly is getting your mount running to your satisfaction. I'm super glad people are helping you here.
IF you need to adjust it, I 100% can help.?
All i was?trying to suggest (maybe not so great) is don't *start* with the assumption you *need* to adjust your mount.?
I only said run it and see how it performs. And we can determine what needs to happen from there. I have helped many people to get their mounts up and running. Many times I'm helping them back out the changes they made because those changes degraded their
performance.?
You asked if we took the time to adjust these mounts prior to leaving the factory, and yes, I watch Scott do this all the time and with great attention to detail for each mount. I'm just relating the confidence I have in how the mount was adjusted and
left the shop. I assume you want to take advantage of that care.??
If you are concerned about the noise, a video with audio (or audio) could help answer that very quickly.
Michael's battery voltage converter is an excellent choice as well
Whatever else comes up, this is a great group of folks and I'm happy to help as well (here or via tech support)
Brian
On Mon, Aug 24, 2020 at 7:57 PM jeff marston <jeffmarston@...> wrote:
Brian?
Brian Valente
portfolio
|
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
I really appreciate your getting back to me about this. If we can start over with this conversation, that would be great. I found a b
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Monday, August 24, 2020 9:13 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
My apologies - that wasn't my intention at all, so please let me try again:?
Most importantly is getting your mount running to your satisfaction. I'm super glad people are helping you here.
IF you need to adjust it, I 100% can help.?
All i was?trying to suggest (maybe not so great) is don't *start* with the assumption you *need* to adjust your mount.?
I only said run it and see how it performs. And we can determine what needs to happen from there. I have helped many people to get their mounts up and running. Many times I'm helping them back out the changes they made because those changes degraded their
performance.?
You asked if we took the time to adjust these mounts prior to leaving the factory, and yes, I watch Scott do this all the time and with great attention to detail for each mount. I'm just relating the confidence I have in how the mount was adjusted and
left the shop. I assume you want to take advantage of that care.??
If you are concerned about the noise, a video with audio (or audio) could help answer that very quickly.
Michael's battery voltage converter is an excellent choice as well
Whatever else comes up, this is a great group of folks and I'm happy to help as well (here or via tech support)
Brian
On Mon, Aug 24, 2020 at 7:57 PM jeff marston <jeffmarston@...> wrote:
Brian?
Brian Valente
portfolio
|
Re: Gear lash adjustments on my G11t
Hi Jeff My apologies - that wasn't my intention at all, so please let me try again:? Most importantly is getting your mount running to your satisfaction. I'm super glad people are helping you here. IF you need to adjust it, I 100% can help.? All i was?trying to suggest (maybe not so great) is don't *start* with the assumption you *need* to adjust your mount.? I only said run it and see how it performs. And we can determine what needs to happen from there. I have helped many people to get their mounts up and running. Many times I'm helping them back out the changes they made because those changes degraded their performance.? You asked if we took the time to adjust these mounts prior to leaving the factory, and yes, I watch Scott do this all the time and with great attention to detail for each mount. I'm just relating the confidence I have in how the mount was adjusted and left the shop. I assume you want to take advantage of that care.?? If you are concerned about the noise, a video with audio (or audio) could help answer that very quickly. Michael's battery voltage converter is an excellent choice as well Whatever else comes up, this is a great group of folks and I'm happy to help as well (here or via tech support) Brian On Mon, Aug 24, 2020 at 7:57 PM jeff marston <jeffmarston@...> wrote:
--
Brian? Brian Valente portfolio |
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
Brian,
As I am sure you are aware, new things are often discovered as we use mechanical things. They all have their little idiosyncrasies. This was not an inexpensive item and I should?
be able to expect some help without negative feedback. If you don't have the time or the patience to help me, have someone else contact me. I have heard from many people
that the people at Losmandy were great to work with, and were always helpful. You have shown that there are always exceptions to the rule. If we are not expected to adjust our own mounts, why are there videos covering it in detail? Scott may have hand tuned
the mount, but shiping is not a gentle process. Fortunately, some of the people on the Losmandy forum have
been helping me with some information and suggestions. I would still welcome?your positive help. If you can't do that, maybe, I can find someone else at Losmandy to help me.?
Jeff
From: [email protected] <[email protected]> on behalf of jeff marston <jeffmarston@...>
Sent: Monday, August 24, 2020 5:34 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
I have been spending some time looking for a 15+ volt battery. They all seem to be 12 volts. If you have any suggestions I would?appreciate
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Monday, August 24, 2020 4:47 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
I'm surprised to see your post here, I thought we covered this in the ticket you lodged, and that you reported your mount was working fine??
I mentioned this previously, you need a higher voltage power source than 12v, especially?for the G11T. 15-18v is what works best. In the interim you can also try turning down the slew speed and see if that impacts the messages. if it does, it definitely
is a power source issue.?
Improper balance can also potentially cause that warning.??
Your mount arrived and was hand-tuned by Scott personally. We really recommend (and continue to recommend) that you do not make any adjustments unless instructed by Losmandy, especially for a brand new mount.
Brian
On Mon, Aug 24, 2020 at 3:36 PM <jeffmarston@...> wrote:
I have had my G11t mount for almost a week. When it arrived the RA and Dec motors would seize when I was trying to slew the mount. I watch Scott¡¯s videos and have done some Brian?
Brian Valente
portfolio
|
Re: Gear lash adjustments on my G11t
Sonny Edmonds
Hi Jeff,
A long way off, but when I got my GM811G HD, I mounted the motors as instructed. The Dec axis was a bit loud. So I did the described 1/4 turn loosen and tried adjusting the motor. It got quieter. Not silent, but quieter. The square cut gears used in these mount (Also referred to as Bull Gears, because of how strong the design has been in industry) are know for being a bit noisy. Long I have heard of complaints by some about mount noise. All types of mounts, actually. Neither of my mounts have ever been silent, and not would I expect them to be. They are machines and when running at high speed, I would expect them to be noisy to some extent. Mine has gotten quieter as it has run in. Scott and Brian advised me when I picked mine up, "Don't mess with it. Just use it." Sage advice. -- SonnyE (I suggest viewed in full screen) |
Re: Gear lash adjustments on my G11t
¿ªÔÆÌåÓý
Thanks?Deric. Michael contacted me and has been very helpful. He even gave me his phone number if I needed to have a conversation about my mount.
Jeff
From: [email protected] <[email protected]> on behalf of Deric Caselli <JethroStCyr@...>
Sent: Monday, August 24, 2020 5:51 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hello Jeff,
I use a 12v LifPo4 battery plus voltage pump made by our very own Michael Herman, that boost the voltage to I think 17.3 volts to help prevent motor stalls. It works very well and it also has a? ammeter that you can use to dial in the ballance
better. Just Email Michael at mherman346@....
HAPPY SKIES AND KEEP LOOKING UP Deric
Sent from my Galaxy Tab A
-------- Original message --------
From: jeff marston <jeffmarston@...>
Date: 8/24/20 6:34 PM (GMT-06:00)
Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t
I have been spending some time looking for a 15+ volt battery. They all seem to be 12 volts. If you have any suggestions I would?appreciate
From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Monday, August 24, 2020 4:47 PM To: [email protected] <[email protected]> Subject: Re: [Losmandy_users_io] Gear lash adjustments on my G11t ?
Hi Jeff
I'm surprised to see your post here, I thought we covered this in the ticket you lodged, and that you reported your mount was working fine??
I mentioned this previously, you need a higher voltage power source than 12v, especially?for the G11T. 15-18v is what works best. In the interim you can also try turning down the slew speed and see if that impacts the messages. if it does, it definitely
is a power source issue.?
Improper balance can also potentially cause that warning.??
Your mount arrived and was hand-tuned by Scott personally. We really recommend (and continue to recommend) that you do not make any adjustments unless instructed by Losmandy, especially for a brand new mount.
Brian
On Mon, Aug 24, 2020 at 3:36 PM <jeffmarston@...> wrote:
I have had my G11t mount for almost a week. When it arrived the RA and Dec motors would seize when I was trying to slew the mount. I watch Scott¡¯s videos and have done some Brian?
Brian Valente
portfolio
|
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