Re: New G11 Question Concerning Stiction
Thanks all.
I did balance the system by moving the ALT to 0.? The RA axis did move more freely and a good balance was achieved.
I took the system out over two nights last week and it performed very well imaging the Fireworks galaxy with decent seeing and some wind on my 9.25" SCT fitted with a 0.7x focal reducer (FL = 1645mm) and an off-axis guider.? I used PHD2 with the Periodic Error correction algorithm on RA fixing the period to 239.34 sec.? Total RMS values ranged between 0.46 and 0.65.? The higher values came on the second night where there was more wind and haze.? I used my truck as a windscreen.? Control with Sequence Generator Pro worked without a hitch and the Gemini 2 Ethernet connection was flawless.
Next, I will point to a target toward the south.
Mark W
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Re: Service/Upgrade appointment request
Just to let you know ,I've been on the waiting list for a OPW for the G11 for over a year.
I don't believe this is a priority, although it should be.
Ken
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Re: Adding grease to existing greased worm and wheel
On Tue, Jul 6, 2021 at 12:21 PM, Michael Herman wrote:
I recommend you use a cotton cloth to wipe out the existing lube
I use my fingers.? I don't want to get lint in the gears or worm.? ------------------------ Jim W Phoenix, AZ. USA Losmandy GM811G, NINA 1.11, ASI2600MC Pro, Sky-Watcher Scopes
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Re: Adding grease to existing greased worm and wheel
Thank you all for your input.? I have ordered some?CRC Brake and Caliper grease from Amazon.? It'll be here Thursday.? I have to say that it took quite a bit to sway me from Artic Lube.? What did it was the plethora of Artic Lube variants.??CRC Brake and Caliper grease had two variants, large and small.
Pete
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Re: Service/Upgrade appointment request
Okay thanks, I'll call (I emailed her but never heard back). I signed up for the waitlist on the store awhile back so I assume I'm in a spreadsheet or something.?
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Re: Service/Upgrade appointment request
Just as a data point, I ordered an OPW for a GM8 in February, and a GM811G in March. Got the mount, but still waiting for the OPW.?
Can't really sell the GM8 with the PE it has right now so i guess i'm keeping two mounts (not complaining! :D)
Guilherme
On Tue, Jul 6, 2021 at 12:33 PM Brian Valente < bvalente@...> wrote: [Edited Message Follows]
UPDATE (sorry Keith, i thought you were sending me an email directly) I don't have that info - i did ask and it varies from month to month depending on how much demand is for new vs. additional so there's no one answer. We are still 10-12 weeks lead time on new mount orders, so i'm guessing for now they are allocated to new mounts. If you're waiting for one, I encourage you to call Tanya at the shop directly.? Brian?
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Brian - any updates to this?
Thanks
Keith
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Brian?
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Brian Valente
portfolio
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Re: Adding grease to existing greased worm and wheel
Jim
it gets hard over time and also tends to spread out. if you search on this group you will find some examples (pics) of really bad consequences of lithium
On Tue, Jul 6, 2021 at 11:44 AM Jim Waters < jimwaters@...> wrote: On Tue, Jul 6, 2021 at 11:16 AM, Brian Valente wrote:
please do NOT use lithium grease.?
we use arctic lube here at the shop, and many others use superlube
I use SuperLube on my GM811G.? What are the specific issues with lithium grease?? Just want to know.? Thx
?
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Jim W
Phoenix, AZ. USA
Losmandy GM811G, NINA 1.11, ASI2600MC Pro, Sky-Watcher Scopes
-- Brian?
Brian Valente portfolio
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Re: Service/Upgrade appointment request
UPDATE (sorry Keith, i thought you were sending me an email directly) I don't have that info - i did ask and it varies from month to month depending on how much demand is for new vs. additional so there's no one answer. We are still 10-12 weeks lead time on new mount orders, so i'm guessing for now they are allocated to new mounts. If you're waiting for one, I encourage you to call Tanya at the shop directly.? Brian?
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Brian - any updates to this?
Thanks
Keith
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--
Brian?
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Brian Valente
portfolio
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Re: Service/Upgrade appointment request
Brian - any updates to this?
Thanks
Keith
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Re: Adding grease to existing greased worm and wheel
Hello,
I have done a study of the available greases.
Here is the data:
4-ball test coeff of friction:
CRC Brake and Caliper grease 4 ball wear scar 0.6 mm Timken load 60 lbs Copper corrosion 1B (shiny 100C 24 hr test)
Arctic Jetlube recommended by Losmandy Max weld 200 Load index 25 4 ball Wear scar 0.7 mm
Superlube with Syncolon ptfe 4 ball Wear scar 1.0 mm Timken load 40 lbs Copper corrosion 1B shiny 100C 24 hr test
Super lube high temp and pressure grease 4 ball Wear scar 1.0 mm Timken load 50 lbs Copper corrosion 1B shiny 100C 24 hr test
Shell AeroShell 33 (no MolyD) uses lithium.?? Copper corrosion 1B ( shiny 100C 24 hr test) No data on 4 ball test.
Shell AeroShell 33 MD (with MolyD) uses lithium.?? Copper corrosion 1B ( shiny 100C 24 hr test) No data on 4 ball test.
____ Conclusion: CRC Brake and Caliper grease has MolyD, Graphite, and Teflon. It has the highest Timken bearing result (60lbs) and shortest 4 ball test result (0.6mm).??
Experience: ?on the G11T (titan RA): ?Super lube showed "chattering" in one worm direction rotation.? CRC Brake and Caliper grease showed no chatter.?Others protect told me of better results on their G11 with the CRC than Super lube. I bought but did not try the Arctic jetlube.?
So...
I recommend you use a cotton cloth to wipe out the existing lube, and put in the CRC Brake and Caliper grease.? Here is a picture of the container. The top lid has a brush to apply the grease.? It has antocorrosion ingredients that prevent damage to the brass worm in case you were to get a worm upgrade.
Best regards, Michael ?
On Tue, Jul 6, 2021 at 11:16 AM, Brian Valente wrote:
please do NOT use lithium grease.?
we use arctic lube here at the shop, and many others use superlube
I use SuperLube on my GM811G.? What are the specific issues with lithium grease?? Just want to know.? Thx
?
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Jim W
Phoenix, AZ. USA
Losmandy GM811G, NINA 1.11, ASI2600MC Pro, Sky-Watcher Scopes
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Re: Adding grease to existing greased worm and wheel
On Tue, Jul 6, 2021 at 11:16 AM, Brian Valente wrote:
please do NOT use lithium grease.?
we use arctic lube here at the shop, and many others use superlube
I use SuperLube on my GM811G.? What are the specific issues with lithium grease?? Just want to know.? Thx ? -- ------------------------ Jim W Phoenix, AZ. USA Losmandy GM811G, NINA 1.11, ASI2600MC Pro, Sky-Watcher Scopes
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Re: Adding grease to existing greased worm and wheel
I recently switched from super lube to moly based CRC brake and
caliper lube.? The moly based stuff, to my senses, handles higher
friction loads considerably better.? I am using custom spring
loaded worms that have constant pressure, and no back-off bolt
like the OEM SLW has.? Due to the constant pressure of the spring,
I felt the super lube wasnt robust enough to stay in place over
time.?
However with a stock 2-piece worm block and static mesh, super
lube is cheap, readily available, and has been proven to work well
across many many mounts.? I'd also suggest steering clear of
lithium grease.
Good luck,
-Tony
On 7/6/2021 2:11 PM, Pete wrote:
toggle quoted message
Show quoted text
I have just finished taking out the backlash from my 1992 steel
wormed CG11.? I had the gearbox off and the Oldham connector.?
During this process I removed a small amount of lube from the
bearings (reduced to thick guck) and from the steel worm gear.?
Now it is all back together I see that the worms and gears
assemblies? look a bit under lubricated.? I do not wish to
dismantle the whole thing and clean off the old worm grease.? I
would rather add a small amount of lube to what's already there.?
Questions, what?
I quite like white lithium grease but am reluctant to mix it with
what has already been doing a fine job since 1992.
What product do I use on the worms please.
Thanks.
Pete
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Re: Adding grease to existing greased worm and wheel
please do NOT use lithium grease.?
we use arctic lube here at the shop, and many others use superlube
I have just finished taking out the backlash from my 1992 steel wormed CG11.? I had the gearbox off and the Oldham connector.? During this process I removed a small amount of lube from the bearings (reduced to thick guck) and from the steel worm gear.? Now it is all back together I see that the worms and gears assemblies? look a bit under lubricated.? I do not wish to dismantle the whole thing and clean off the old worm grease.? I would rather add a small amount of lube to what's already there.? Questions, what?
I quite like white lithium grease but am reluctant to mix it with what has already been doing a fine job since 1992.
What product do I use on the worms please.
Thanks.
Pete
-- Brian?
Brian Valente portfolio
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Adding grease to existing greased worm and wheel
I have just finished taking out the backlash from my 1992 steel wormed CG11.? I had the gearbox off and the Oldham connector.? During this process I removed a small amount of lube from the bearings (reduced to thick guck) and from the steel worm gear.? Now it is all back together I see that the worms and gears assemblies? look a bit under lubricated.? I do not wish to dismantle the whole thing and clean off the old worm grease.? I would rather add a small amount of lube to what's already there.? Questions, what?
I quite like white lithium grease but am reluctant to mix it with what has already been doing a fine job since 1992.
What product do I use on the worms please.
Thanks.
Pete
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Yup, that's basically it. A few bigger popular galaxies here & there but mostly the bigger nebulae for now
Thanks for your help Edward !
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I would not worry about the under-sampling per se.? At that image scale, you are probably going to target larger emission nebula. If you have enough subs, you can drizzle x2 or x3 and certainly improve the star shapes but unlikely to see much difference unless you are cropping the image down to a central target.
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Edward
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So after bashing my head a few times on the bahtinov mask I finally remembered it was a Carey mask and not a bahtinov after all !
Downside is that NINA can¡¯t analyze that for me. Upside is I feel less insane.?
I know my eyes are no computer but as far as I can see this is focus. Admittedly it¡¯s on Vega and ideally some kind of smaller art would be ideal but unless someone sees something off I¡¯m going to call this good
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Thanks, I will post up a stretched version - the stars visually look good to me, so maybe I should just stop obsessing ?
Regarding the undersampling - I guess the only solution there is a smaller sensor or a longer FL scope (or a reducer) or maybe applying drizzle to the stack ?
I've been doing "CFA drizzle" to reduce the blur of the debayer process, but keeping scale=1 and not blowing up the image. Maybe it would be something to play with
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Due to the image under-sampling, I am not sure the star sizes are really 6-7 arcsec.? I was hard pressed to find stars more than 2 pixels across in the image. Perhaps it would help to stretch the image to see what the star shapes look like.?
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Edward
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Thanks Edward. Yeah 3.5 pixels I believe is what NINA reports, that translates into 6-7 arc seconds (2.18 as/px scale)
Many people report getting 2-3 arc/sec which seems not achievable to me
That link is actually a 10 minute sub from my target. I dont think NINA saves the images it takes for AF (at least not that I know of)
This is a Nikon D5300 for the imaging camera
Without the duo-band filter, I can get into the high 2 "pixel" scale but it was still 5+ arc seconds which just seems huge - many people report tossing *any* sub over 4" for instance ... very odd
My skies are not great (Bortle 6 but also feel very "milky" for want of a better word
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Mark Wetzel
Pete
Michael Herman
Edward Plumer