Balancing the EQ6-R

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Larry 1969
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Balancing the EQ6-R

#1

Post by Larry 1969 » Thu Jan 02, 2020 7:18 pm

Sorry for the barrage of questions but I've been reading and watching videos so I will be ready when all of my gear arrives and I have another question regarding balance.
Some of the videos show intentionally making the rig a bit heavier on the weight side and on the rear of the scope to take out gear lash. I understand that but my mount is belt driven.
Should I bias the balance like the videos show or get it right on?

Thanks!

Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.

For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with a refurbished Windows 10 laptop.
Explore Scientific HR coma corrector
Full spectrum modded Canon T3i (APS-C size sensor)
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yobbo89
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#2

Post by yobbo89 » Thu Jan 02, 2020 9:51 pm

I believe the eq6-r is not spring loaded on the worm gear to the worm wheel, this is where meshing / gear lash occurs, You can choose what side of the mount head you would like to offset the weight based on what part of the sky you usually start tracking from, one side usually tracks a little better then other doing so, you can also use a neutral balance, doing so evens out tracking accuracy/error on both sides, depending on the desighn of the mount and tolerance of the machining evening the balances can introduce rocking oscillation and may give you poor guiding results.

I find that marking the counterweight bar with tape and shifting the weight once the mount does a meridian flip gives the best results.

I run my mount one side heavy and just leave it, superb tracking on one side and average on the other, an even balance gives me rocking oscillation for my setup so I don't use this method.

When I talk about what side of mount to keep loaded/heavy, there is only One side that should be offset with weight
which is the side the mount is tracking from. change the weights to make the scope side heavy or the counter weight bar side heavy based on the flip.
scopes :gso/bintel f4 12"trust 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/ (upcoming : mesu 200 v2)
filters : 2'' astronomik lp/badder lrgb h-a,sII,oIII,h-b,Baader Solar Continuum, Thousand Oaks Solar Filter.
extras : skywatcher f4 aplanatic cc, Baader MPCC MKIII Coma Corrector,Orion Field Flattener,zwo 1.25''adc.starlight maxi 2" 9x filter wheel
Larry 1969
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#3

Post by Larry 1969 » Thu Jan 02, 2020 10:32 pm

Thanks yobbo! I plan to start out unguided taking maybe 1 min exposures. I would like to add an OAG later but can't until I upgrade my DSLR.

Larry
For visual:
10" Skywatcher collapsible goto dob, various EP's and a Celestron StarSense auto align.

For imaging:
Orion 8" astrograph 800mm @ F3.9
Eq6-R Pro controlled by APT via EQmod with a refurbished Windows 10 laptop.
Explore Scientific HR coma corrector
Full spectrum modded Canon T3i (APS-C size sensor)
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Gordon
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#4

Post by Gordon » Fri Jan 03, 2020 12:08 am

Just looking at the specs it appears the EQ6-R is belt driven so in theory that should help. Even so it's always a good idea to go just a tad heavy on one side as yobbo suggested.
Gordon
Scopes: Explore Scientific ED80CF, Skywatcher 254N, Orion ST80, Orion Atlas EQ-g mount, Orion SSAG guider. Baader MPCC MkIII coma corrector, Vixen 70mm refractor. Lunt LS35THa solar scope. Skywatcher EQ5pro mount. Imagers: ZWO ASI1600 MM Cool, ZWO ASI174mm-C (for use with my Quark chromosphere), ZWO ASI120MC Filters: LRGB, Ha 7nm, O-III 7nm, S-II 7nm Eyepieces: a few, Primary software: Cartes du Ciel, EQMOD, SGP, Nebulosity, Photoshop, StarTools V1.4
Blog: http://ghswen.blogspot.com/
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#5

Post by Benjamin » Tue Jan 14, 2020 7:56 am

Just saw this so sorry for the late addition. My EQ6-R has a bit of backlash which changes with weather a bit - hot and the gears expand a fraction, cold and they lossen up a bit. Easy to adjust using Astrobaby’s guide to the EQ6. I had mine over tightened a bit and this cause some very sticky spots with big sudden jumps in guiding. Loosening them off a bit caused an initial period of uncorrected guiding then very smooth sailing. The slightly weighted counter weight side wasn’t so great with the tight gears but fine with the right tension and acceptable backlash. Just my recent experience with it anyway :-)
Scopes:Skywatcher f5 12" Dob, f4 8” Quattro, ED80, ED100, Saxon f5 8" Newt
Mounts:Skywatcher EQ6-R, HEQ5 Pro (EQMod), AZ4
Cameras:ZWO ASI1600MM-Pro, ProStar guidecam, ZWO 8 Position EFW (Astrodon filters)
Apps:Nebulosity, PHD2, Sequence Generator Pro, Voyager (Starkeeper), PixInsight
Eyepieces:Explore Scientific, Pentax XW, TeleVue Panoptic, Delos, Nagler Zoom, Ethos, LVW, BCO
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