VintageBigBlue.org

 

Re: PemPro-v2 Questions


Aug 15, 2001

 


----------------------------

#5478 Aug 15, 2001

Rene:



1. Do you have a list of the differences between version 2.1 and 1.2?



2. In your manual, you tell of the benefits of installing shaft encoders,

but indicate no downsides. Are there any?



3. If shaft encoders are not installed, is there ever a time when

"Setup->Encoder->Use Encoder" should be activated?



Mike Rudolph



----------------------------

#8225 Jan 28, 2002

Hey Gang,



I've just acquired a C 9.25 and I have 2 questions. I have searched

the archives and found lots of interesting and informative info, but

so far, not the specific answer I'm looking for...



I've decided that I'll need a G11 to adequately handle the 9.25, and

provide some bit of room to grow for future photography. Question 1

is, it looks like I'll need the DC 9.25 dovetail plate to mount the

9.25 to the G11? I've seen reference in the archives to the Losmandy

plates not fitting the new 9.25's, I'm assuming that since those are

somewhat dated messages, that the plate listed on the Losmandy site

will work with my OTA?



The second Q is... It looks to me like the user needs to provide a

power source for the mount, any thoughts on a good way to go for this?



As an aside, I find the psychology of this interesting, when I first

started researching this stuff a few months ago, I can remember

thinking, 'Wow, look at those awesome giant expensive mounts, I can't

imagine I'll ever need one of those... (or want to schlep one)', and

here I am, basically seeing it as a neccessity. Go figure.



Thanks in advance,



Eric



PS, if there is a resource I've missed that will give me answers to

these newby questions, please let me know!



----------------------------

#8226 Jan 28, 2002

Eric wrote: > The second Q is... It looks to me like the user needs to provide a

> power source for the mount, any thoughts on a good way to go for this?



For field power, a good 12V deep-cycle marine battery, gel-cell, etc. battery is fine; see the current discussion going on for these types of batteries. I'd start inexpensively (you're likely to never need more), with a 30-50 amp-hour deep cycle marine battery, around $40-50 at WalMart, Sears, etc.



For power at home, you can either use the same battery, or purchase a good quality 12V DC power supply that plugs into the 110-120V AC outlets. You'll want at least 2-3 amps output, so don't get one of the cheap ones that only put out 500ma or so. Fry's in the US has good-quality 5-amp 12VDC supplies for around $35.

> As an aside, I find the psychology of this interesting, when I first

> started researching this stuff a few months ago, I can remember

> thinking, 'Wow, look at those awesome giant expensive mounts, I can't

> imagine I'll ever need one of those... (or want to schlep one)', and

> here I am, basically seeing it as a neccessity. Go figure.



I know what you mean...wait'll you outgrow the Losmandy and want an AP1200 or something...:)



Paul



----------------------------

#8230 Jan 28, 2002

The DC9.25's fit the current version of the 9.25 OTA. We have one

mounted up in the shop on my G11 Gemini and works perfectly.



Ray York

Anacortes Telescope and Wild Bird

www.BuyTelescopes.com

www.AstroMart.com

(800) 850-2001



> -----Original Message-----

> From: wa5hoo [mailto:ppsupport@...]

> Sent: Monday, January 28, 2002 7:13 PM

> To: Losmandy_users@yahoogroups.com

> Subject: [Losmandy_users] New to Group - 2 Questions

>

> Hey Gang,

>

> I've just acquired a C 9.25 and I have 2 questions. I have searched

> the archives and found lots of interesting and informative info, but

> so far, not the specific answer I'm looking for...

>

> I've decided that I'll need a G11 to adequately handle the 9.25, and

> provide some bit of room to grow for future photography. Question 1

> is, it looks like I'll need the DC 9.25 dovetail plate to mount the

> 9.25 to the G11? I've seen reference in the archives to the Losmandy

> plates not fitting the new 9.25's, I'm assuming that since those are

> somewhat dated messages, that the plate listed on the Losmandy site

> will work with my OTA?

>

> The second Q is... It looks to me like the user needs to provide a

> power source for the mount, any thoughts on a good way to go for this?

>

> As an aside, I find the psychology of this interesting, when I first

> started researching this stuff a few months ago, I can remember

> thinking, 'Wow, look at those awesome giant expensive mounts, I can't

> imagine I'll ever need one of those... (or want to schlep one)', and

> here I am, basically seeing it as a neccessity. Go figure.

>

> Thanks in advance,

>

> Eric

>

> PS, if there is a resource I've missed that will give me answers to

> these newby questions, please let me know!

>

>

---------------

>

> To unsubscribe from this group, send an email to:

> Losmandy_users-unsubscribe@egroups.com

>

>

>

> Your use of Yahoo! Groups is subject to

docs.yahoo.com/info/terms/







----------------------------

#8235 Jan 29, 2002

In a message dated 1/28/2002 10:22:56 PM Eastern Standard Time,

lefevre@... writes:

>

> For power at home, you can either use the same battery, or purchase a good

> quality 12V DC power supply that plugs into the 110-120V AC outlets.



I use a Radio Shack AC to DC adapter, cat. NO. 16-245A, output

13.5 V DC 1 amp. Has worked like a champ, took a while before

I stopped powering my G 11 from batteries at home. I also HAD to

replace the power cord that came with my G 11 with a REAL

cord that wont come apart like the original one....... Funny, the

power cord didn't break until I read the posts of people having

theirs go bad on them. What do ya know, mine went the day

I read those posts. (they all seemed to go bad at the same time)



Allan Mayer



----------------------------

#8238 Jan 29, 2002

Call Scott about the plate. He's the expert and

will be able to tell you EXACTLY what you need

to purchase.



As far as the power supply if you have access to

120VAC, then goto radio shack and buy one of their

12V 1000mA AC-DC converters. That's twice as much

amperage as you need for the G-11 non-goto.



Also, there is a current thread on battery recommendations

that you should look at if you are in search of a "portable"

power source.



Regards,



-----Original Message-----

From: wa5hoo [mailto:ppsupport@...]

Sent: Monday, January 28, 2002 9:13 PM

To: Losmandy_users@yahoogroups.com

Subject: [Losmandy_users] New to Group - 2 Questions





Hey Gang,



I've just acquired a C 9.25 and I have 2 questions. I have searched

the archives and found lots of interesting and informative info, but

so far, not the specific answer I'm looking for...



I've decided that I'll need a G11 to adequately handle the 9.25, and

provide some bit of room to grow for future photography. Question 1

is, it looks like I'll need the DC 9.25 dovetail plate to mount the

9.25 to the G11? I've seen reference in the archives to the Losmandy

plates not fitting the new 9.25's, I'm assuming that since those are

somewhat dated messages, that the plate listed on the Losmandy site

will work with my OTA?



The second Q is... It looks to me like the user needs to provide a

power source for the mount, any thoughts on a good way to go for this?



As an aside, I find the psychology of this interesting, when I first

started researching this stuff a few months ago, I can remember

thinking, 'Wow, look at those awesome giant expensive mounts, I can't

imagine I'll ever need one of those... (or want to schlep one)', and

here I am, basically seeing it as a neccessity. Go figure.



Thanks in advance,



Eric



PS, if there is a resource I've missed that will give me answers to

these newby questions, please let me know!







To unsubscribe from this group, send an email to:

Losmandy_users-unsubscribe@egroups.com







Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/



----------------------------

#8241 Jan 29, 2002

Thanks for the help guys!



Eric



----------------------------

#8242 Jan 29, 2002

Allan wrote: > I use a Radio Shack AC to DC adapter, cat. NO. 16-245A, output

> 13.5 V DC 1 amp. Has worked like a champ, took a while before

> I stopped powering my G 11 from batteries at home. I also HAD to

> replace the power cord that came with my G 11 with a REAL

> cord that wont come apart like the original one....... Funny, the

> power cord didn't break until I read the posts of people having

> theirs go bad on them. What do ya know, mine went the day

> I read those posts. (they all seemed to go bad at the same time)



Gee, thanks a lot Allan, now mine will probably break after reading your post ;-)



I actually went to Fry's yesterday and picked up a medium-sized project box...my intention is to put the 5-amp power supply I have in there, have inputs on the back for both AC and battery, and outputs on the front for the G-11, dew heaters, and DSCs. Then I'll just carry that unit with the mount, switching from AC at home to DC in the field, eliminating the regular Losmandy power cord in the process. Just hope it holds up until I get it done...grin>



Paul



----------------------------

#9314 Mar 24, 2002

1. My GM-8 is zig-zagging back and forth in RA to a rather alarming

degree. I am running very little weight on it and its balanced so

there is a tiny bit of weight resisting the drive. My polar

alignment is pretty good. I am using a CCD, so it is darn sensitive

to such movement. Does this just sound like a maintenance issue? I

haven't done my yearly clean and lube and it sits in my observatory

year round. It has gotten worse and worse over the last few months.



2. Is the Gemini system worth it? I've started doing variable star

observing and I really need either go-to or digital setting circles

to help me find these rather dim stars. At $1600 it sure seems

expensive to me. Does the SAO database contain all of the GCVS stars?



Thanks!

Michael Koppelman

www.lolife.com/astrophotos/







----------------------------

#40006 Sep 26, 2008

When you guys are talking about the G11 PE in arc/sec (for ex,

comparing the Ovision worm PE improvement), are you looking at the

freshly acquired data graphs or do you go into the create PE window

and just read the numbers in the top right boxes (RMS & +/-), or do

you finish the create PE window and read the Peak to Peak numbers in

the top window of the Gemini L4 tab window?



I am trying to compare apples to apples, since I am new to pempro-v2

(took me a week to get by the 5 or 6 errors), not sure If im' doing

the testing correctly.



My 2 year old G11 Gemini L4 v1.01 with 6 complete worm cycles the PE

listed below (read from the Gemini L4 tab);



5.60 peak to peak PEC=off, auto guide = Off,

2.80 peak to peak PEC=On, auto guide = Off,

1.45 peak to peak PEC=On, Auto guide = On



My setup is a WO-ZS80FD with Antares 12x80mm finder with diag and

eyepiece removed and DSI mono for guider using PHD.



2nd Question:

Will pempro-v2 test a cg-5 mount? When I try to connect to the cg-5

it says this mount does not support PEC (which is true), but I just

want to see what the PE is with and with out auto guiding. If pempro

will not test PE on the cg-5, what other software will?



Thanks in advance!

Oz



----------------------------

#40008 Sep 26, 2008

Hi Oz,



The peak-to-peak numbers represet the periodic error PemPro found in

your data. It's probably very close to the real peak-to-peak periodic

error if you have at least 3-4 worm cycles and the data is clean.



You can examine the real data acquisition screen also, just set the

check on next to the drift adjustment options for X and Y. From this

screen, you should see the overall magnitude of the error, periodic

and non-periodic. Some of it may be due to seeing and other random

events.



Raw 5.6 arcseconds p-2-p is very respectable. I would guess that with

some work you should be able to reduce it even more using PEC (around

2 arcseconds is what I've seen).



But, 2.8 arcseconds is still excellent, and if you look at the data

acquired with PEC=on and don't see any sudden swings or jumps, then

you can easily guide the remaining error out at even long focal

length.



To test using PemPro you don't need to connect to the mount, only to

the camera.



Regards,



-Paul



--- In Losmandy_users@yahoogroups.com, "wforacer.rm" wforacer@...>

wrote: >

> When you guys are talking about the G11 PE in arc/sec (for ex,

> comparing the Ovision worm PE improvement), are you looking at the

> freshly acquired data graphs or do you go into the create PE window

> and just read the numbers in the top right boxes (RMS & +/-), or do

> you finish the create PE window and read the Peak to Peak numbers

in > the top window of the Gemini L4 tab window?

>

> I am trying to compare apples to apples, since I am new to pempro-

v2 > (took me a week to get by the 5 or 6 errors), not sure If im' doing

> the testing correctly.

>

> My 2 year old G11 Gemini L4 v1.01 with 6 complete worm cycles the

PE > listed below (read from the Gemini L4 tab);

>

> 5.60 peak to peak PEC=off, auto guide = Off,

> 2.80 peak to peak PEC=On, auto guide = Off,

> 1.45 peak to peak PEC=On, Auto guide = On

>

> My setup is a WO-ZS80FD with Antares 12x80mm finder with diag and

> eyepiece removed and DSI mono for guider using PHD.

>

> 2nd Question:

> Will pempro-v2 test a cg-5 mount? When I try to connect to the cg-5

> it says this mount does not support PEC (which is true), but I just

> want to see what the PE is with and with out auto guiding. If

pempro > will not test PE on the cg-5, what other software will?

>

> Thanks in advance!

> Oz

>



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