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Author Topic: Look what a-pier-ed!  (Read 799 times)

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Offline Bazzaar

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Look what a-pier-ed!
« on: 18:18:56, 05 October, 2016 »
Here is my new pier. All home constructed from some surprising parts.
The main tube is 1.2m of 150mm aluminium tube.
The "foot" is a brake disk and so is the "top hat".
A 200mm by 10mm thick aluminium disk,painted white, is the interface from the pier to the mount.
Four M10 by 120mm anchors secure the base and M10 threaded rod runs up to hold the top hat down.
The tube is hollow at the moment, would be interested in comments on the idea of filling it with something, sand,concrete..

Really pleased with the rigidity it has, hope to try it in anger tonight.

Baz
Tal 200k, SW 200P, iOptron iEQ45 pro, HEQ5 pro, QHY5III174m, QHY5L II mono, Samsung SBC 2001, SharpSky focuser, Zwo ADC,  Celestron 15x70 bins,

Offline Roger B

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Re: Look what a-pier-ed!
« Reply #1 on: 18:43:55, 05 October, 2016 »
Looks like a bugger to polar align

Looks good though    nothing better that a permanent setup

Rog
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Online chris.bailey

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Re: Look what a-pier-ed!
« Reply #2 on: 22:25:11, 05 October, 2016 »
Might just be the effect of wide angle perspective but the base plate looks quite small in relation to the height of the pier.

Conflicting views on filling a pier. I filled mine with kiln dried pier sand before sealing the top hole with epoxy. Prior to filling a gentle tap on the pier did register on the guide graph. With 120kg of sand added, you can hit it with a hammer and the guide graph does not move.

Chris

ps you might want to consider warming those rods up with a blow torch and tightening the turnbuckles so as to get some decent tension in those rods.
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Offline Bazzaar

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Re: Look what a-pier-ed!
« Reply #3 on: 09:35:11, 06 October, 2016 »
Yes Roger it is proving difficult to make fine adjustments in azimuth, needs something to help the mount slide on the adapter plate.
Chris, the base is 240mm dia and the pier is 1.2m high. That's 5 to 1, don't know if that's good or bad.

Baz
Tal 200k, SW 200P, iOptron iEQ45 pro, HEQ5 pro, QHY5III174m, QHY5L II mono, Samsung SBC 2001, SharpSky focuser, Zwo ADC,  Celestron 15x70 bins,

Online chris.bailey

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Re: Look what a-pier-ed!
« Reply #4 on: 10:15:32, 06 October, 2016 »
Yes Roger it is proving difficult to make fine adjustments in azimuth, needs something to help the mount slide on the adapter plate.
Chris, the base is 240mm diagnosed and the pier is 1.2m high. That's 5 to 1, don't know if that's good or bad.

Baz

5:1 does not sound too bad, must be the perspective of that shot that make it look worse. A dial gauge would help judge how much it moves when given a shove!

Chris

ps a bit of Teflon sheet such as https://www.amazon.co.uk/BakeoGlide-2-Teflon-Sheets/dp/B00175QHTU cut to shape might help the Az adjustment.
LX200|ZS70|FSQ85|FLT110|Altair DF250RC|EQ6 Pro(Rowan Belt Mod)|ParamountMX
ATIK383L+/EFW2/OAG|Lodestar|Baader 36mm LRGBHaSIIOIII
Starlight Express SXVRH16/ONAG/FW|Lodestar X2|Baader 2" Filters
Starlight Express SXVRH814/ONAG/FW|LodestarX2|Baader 2" Filters
Lunt LS60PTBF1200|DMK41|Quark Chromo
Samyang 135mm f1.8

 

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