Loose secondary holder, meade 12" lx200 acf

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Loose secondary holder, meade 12" lx200 acf

#1

Post by yobbo89 »


I was keen to get the scope back into collimation and action tonight after I give it a bit of a tune up adjustment but I can't figure out how to tighten the secondary lock ring, it may be seized, the whole thing spins in the corrector really loosely, too loose to hold collimation.

I loosen of the retaining ring screw on the side and hold the centre plate with the collimation screw with the tips of my. Fingers and try to rotate the outer ring and nothing. Any ideas? Should I heat it up?
Attachments
20190919_031915.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#2

Post by JCINGA »


Are the three collimating screws tight?
Meade LX200 12" CLS, Orion XT8i, Meade ETX70
Televue: 17mmNAG, 55mmPL, 2Xpowermate, Ex.SCi 4.7mm, Orion Strat 13mm
Baader 2" Moon&sky, Orion 2" 13%
Meade giant field tripod, bobs knobs, peterson focuser, Telerad
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Re: Loose secondary holder, meade 12" lx200 acf

#3

Post by smeyer8015 »


Try pulling towards you gently while turning clockwise. I believe the retaining ring is on the inside. You may have to remove the corrector plate to get to it.
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Re: Loose secondary holder, meade 12" lx200 acf

#4

Post by yobbo89 »


JCINGA wrote: Wed Sep 18, 2019 9:42 pm Are the three collimating screws tight?
They were, I backed them off a little bit and no luck
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#5

Post by yobbo89 »


smeyer8015 wrote: Wed Sep 18, 2019 10:21 pm Try pulling towards you gently while turning clockwise. I believe the retaining ring is on the inside. You may have to remove the corrector plate to get to it.
I gave that a go and no luck, i might have to do that, i have tighten the secondary lock in ring up before at the front, would it be easier to take out the primary from the back and reach up inside and get a friend to help at the front? That way i don't have to deal with alighnment of the corrector
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#6

Post by yobbo89 »


looks like i might have to take the corrector off,it seems they glued the back end on ...
Attachments
eeeeeeeeeee023615.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#7

Post by JCINGA »


Ugh, that does not look fun - sorry man
Meade LX200 12" CLS, Orion XT8i, Meade ETX70
Televue: 17mmNAG, 55mmPL, 2Xpowermate, Ex.SCi 4.7mm, Orion Strat 13mm
Baader 2" Moon&sky, Orion 2" 13%
Meade giant field tripod, bobs knobs, peterson focuser, Telerad
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Re: Loose secondary holder, meade 12" lx200 acf

#8

Post by yobbo89 »


I took the corrector off.fingerprints!! i gave it a wash with some demineral water, it seems that's the only way, the baffle on the inside of the corrector locks onto the front of the mirror lock ring , i have it sorted out now, meade have the corrector marked pretty accurately ,kind of regret using masking tape.
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#9

Post by yobbo89 »


working on the focuser, it such a mess, i had to retap the knob and the brass fitting as it wasn't screwing all the way down and giving me float play,there cutting dies are worn out or they just didn't feed it all the way through,

and also found out the they completely drilled out the rod recess for the 3mm screw that clamps the 6mm x 65 mm thread rod in the brass fitting so the whole thing slips right through, they put two blown out washes to try and fix their mistake... i guess you don't get what you pay for with meade ($5k)
Attachments
20190920_052709.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#10

Post by yobbo89 »


It turns out the bolt is ment to go all the way through, what they needed is a hex screw with a bigger head, I added new Washers, see the terrible ones they supplied, they look like A bit of crud Picked off from a lathe tray after a long day
Attachments
20190920_054228.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#11

Post by yobbo89 »


I Really would like to gain access to the main mirror, it seems there are adjustable bearings on baffle? Might reduce some mirror shifting
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#12

Post by JCINGA »


In my focuser instructions from Peterson, it said that if you have that shipping bolt for the mirror (I can got look and see what size it is) you remove the plug next to the focuser, retract mirror CCW all the way back, screw in the shipping bolt, then go all the way forward CW. Then you take pliers and pump the mirror assembly (carefully as not to let go of it and the spring makes it slam inside) about 12 times, it disperses the grease and mirror flop is decreased a lot.
Meade LX200 12" CLS, Orion XT8i, Meade ETX70
Televue: 17mmNAG, 55mmPL, 2Xpowermate, Ex.SCi 4.7mm, Orion Strat 13mm
Baader 2" Moon&sky, Orion 2" 13%
Meade giant field tripod, bobs knobs, peterson focuser, Telerad
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Re: Loose secondary holder, meade 12" lx200 acf

#13

Post by JCINGA »


40FC51B4-CFE3-4320-A381-48A0296CE802.jpeg
0E07A40F-C184-462C-95CB-176FFCB6B09C.jpeg
Meade LX200 12" CLS, Orion XT8i, Meade ETX70
Televue: 17mmNAG, 55mmPL, 2Xpowermate, Ex.SCi 4.7mm, Orion Strat 13mm
Baader 2" Moon&sky, Orion 2" 13%
Meade giant field tripod, bobs knobs, peterson focuser, Telerad
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Re: Loose secondary holder, meade 12" lx200 acf

#14

Post by yobbo89 »


Thanks alot for the info, i might need some more information on that part about pumping with pliers.
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#15

Post by yobbo89 »


A bit crude looking from the rust, found some long pc fan bolts that are the same size as the original, I just shaved the length down a bit with the dremel, they have hex heads on them so I don't have to use a 2mm Allan key anymore, there's so many times you can adjust those small Allan key screws before they wear out. I'll use these hex heads until I make or buy some knob screws
Attachments
20190921_154119.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#16

Post by yobbo89 »


Added a thumb screw and more felt to give the cover more tention so it doesn't slide off while transporting, gave the secondary a rough collimation with a laser, might Chuck it back on the mount tonight, I think saturn is still around atm,actually wanted me some Luna data
Attachments
20190921_162533.jpg
scopes :gso/bintel f4 12"truss tube, bresser messier ar127s /skywatcher 10'' dob,meade 12'' f10 lx200 sct
cameras : asi 1600mm-c/asi1600mm-c,asi120mc,prostar lp guidecam, nikkon d60, sony a7,asi 290 mm
mounts : eq6 pro/eq8/mesu 200 v2
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, chroma 3nm ha,sii,oiii,nii,rgb,lowglow,uv/ir,Thousand Oaks Solar Filter,1.25'' #47 violet,pro planet 742 ir,pro planet 807 ir,pro planet 642 bp ir.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel,tele vue 2x barlow .

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Re: Loose secondary holder, meade 12" lx200 acf

#17

Post by StarBru »


Hmmm.....My Meade LXD55 Schmidt Newtonian 10" is having a similar problem with the loose secondary spinning around, as I have mentioned here in my own thread. I haven' t taken the corrector off of the OTA yet, but I am hoping the threads are not stripped and it just needs tightened!
Bruce

Refractors: Meade AR-5 127mm f/9.3, Meade ST-80 f/5 and Meade 60mm f/12, Jason 60mm f/15 #313, Jason 60mm f/12 #306 S7, Bushnell Sky Chief III 60mm f/15.
Reflectors/Catadioptrics: Meade 10" F/4 Schmidt-Newtonian, Galileo 120mm f/8.3 Newtonian, Meade 2045D 4" f/10 SCT, Meade ETX-90EC f/13.8 & Sarblue 60mm f/12.5 Maksutov-Cassegrains.
Mounts: Skywatcher EQ6-R Pro & Meade LXD55 Equatorial mounts, ES Twilight II and Meade 2102 ALT/AZ mounts, a modified 10" SkyQuest Dobsonian mount, various 60mm EQ mounts.
Misc: Celestron 20x80mm binoculars, Revolution II Imager/accessories, & lots of optical accessories/eyepieces.
Projects: 8" f/2.9 and 65mm f/10 reflectors, Dobson-style binocular mirror mount.
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