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What did you work on today?

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#6151 bjkaras

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Posted 10 August 2022 - 01:13 PM

I don’t know if it counts as working on something but my next door neighbor came over and his morning to ask for advice on buying a telescope. I was working on something else though. My nephew’s girlfriend had a dead car battery so I helped her install a new one. That’s when the neighbor came over.


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#6152 don clement

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Posted 11 August 2022 - 10:07 PM

 Today worked on some focuser adapter parts. Couple of ways to hold the same couple of  parts in the lathe. First one is using a JFK internally expanding 5C collet machined to hold a part in a in a 3" bored hole. The JFK collet was also used on the mill to hold these part for drilling and tapping holes.
I machined the part on both sides using this 5C collet. Next I mounted the part in a vintage Buck Ajust-Tru chuck and dialed the runnout in to less than 0.0005". Finally machined a 0.025" deep pocket on the face of the part using a Nickole grooving tool.

 

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#6153 R Botero

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Posted 12 August 2022 - 06:36 AM

Clever



#6154 don clement

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Posted 12 August 2022 - 01:14 PM

Worked on the mill holding a part being machined on an internally expanding 5C collet on the rotary table.

 

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#6155 fibonacci

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Posted 14 August 2022 - 02:44 PM

Hi, today I glued the MKII rocker box for my 8“/f6 „box kite“ fixed-truss Dobson design, just in time for the 20th Bavarian Telescope Meeting, which starts August 25. I sanded the multi-ply birch parts and applied a light coat of nitro primer before assembly, excluding joints of course.
The tube is an aluminum and DILITE frame, although for the meeting I will bring the prototype, made entirely from wood. Tube and rocker box weigh in at approx. 18 lbs. each, ready to go, surprisingly light for everyone who picks them up for the first time!
Clear skies, Michael

 

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#6156 Psalm19One

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Posted 14 August 2022 - 07:40 PM

Rocker box nearing completion for a 13.1” scope.  Revised the design of the lower flange to accommodate up to a 16” mirror just in case aperture fever strikes.

RockerBox1
RockerBox2

 


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#6157 sunrag

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Posted Yesterday, 11:45 AM

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Last two weeks, i repaired a LX200 GPS forkbase i got in CN classifieds (changed drive gears, cleaned and relubed, fixed sensor board, fixed Autostar 2 handset).

 

Then i made a cradle to fit in the fork arms. The cradle has a saddle to hold a small refractor or a mak.

 

Last night i tested it with a 102mm/F6 refractor and it worked great.

 

 


Edited by sunrag, Yesterday, 11:46 AM.

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#6158 EricR

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Posted Yesterday, 06:17 PM

attachicon.gif42F62239-CED7-4320-AD85-EB8718DF9764.jpeg

 

Last two weeks, i repaired a LX200 GPS forkbase i got in CN classifieds (changed drive gears, cleaned and relubed, fixed sensor board, fixed Autostar 2 handset).

 

Then i made a cradle to fit in the fork arms. The cradle has a saddle to hold a small refractor or a mak.

 

Last night i tested it with a 102mm/F6 refractor and it worked great.

Cool!

I take it the diagonal would hit when focused if you pointed towards zenith,,, so you just avoid that and watch out, I guess?


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#6159 sunrag

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Posted Yesterday, 06:45 PM

Correct, I use it mostly for Planets, so rarely go over 45 degrees elevation. With this refractor, I can go till ~70degrees without hitting the base.



#6160 chantepierre

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Posted Today, 06:57 AM

Rough ground every pending project (some are for friends & family) with a sine table. Amazing experience. With three hours I saved thirty hours of manual grinding. I printed angled jigs for three diameter & radii of curvature.

 

ROC error varies between 2 and 4% for those first tries. I'm sure it will be easy to get back to the correct values with hand work.

 

150mm / 450mm fl

three 114mm / 450mm fl (yes, one is weirdly cored)

a doublet and plate tool with every radii at 520mm, either convex or concave

 

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The second-hand drill press instantly paid itself back with satisfaction of the saved time.

 

Better view of the angle jigs

 

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Edited by chantepierre, Today, 06:59 AM.

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