Trunnion Mounts -3
I did not expect these mounts to require a third day session, and they are still not finished!
I discovered that two of the drilled holes in each bracket were in the wrong position, by approx 1mm. That is a really bothersome error, because the correct position includes half of the existing hole.
I managed the problem by threading the errant holes, and Loctite gluing in some threaded rod. Each rod was trimmed flush with the surfaces. Then drilling the new hole, partly through the Loctited metal patch. That fix worked well.
THE TRUNNION PINS.
The pins hold the trunnion caps in place. And they took another whole day to make and install. Ah…. just as well I enjoy all of this. They are tiny, and I spent at least 50% of the time looking for them on the workshop floor after accidentally dropping them on several occasions.
So, apart from polishing riveting and painting, I think that the trunnion mounts are finished.
Now planning to make the gear train for the carriage positioning on the chassis, and the pinion, quadrant gear, and bevel gears for the barrel elevation. We are currently in level 3 lockdown for Covid containment, with level 4 looking likely any day, so obtaining brass for the biggest gears is difficult. I am considering workarounds. Apparently community anxiety and depression, family violence, and even suicides are mounting. When I am in the workshop I am in a different world, thank goodness.
What material are you after I can get anything you require and post to you if that helps.
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That is a very kind offer John, thank you. I am looking for some 2.5mm brass plate, 200x200mm. To make the quadrant gears. Happy to pay. Also, welcome to GSMEE. John
Checked with Brass & Copper (they are very close to me) they have 2.5 Brass plate the sheets are 1800 x 900 they will cut but you have to take 900 x whatever you require, let me know what you want to do.
Thanks for checking John. I imagine a 900x piece would be difficult to post, so would be best for me to try other local options. See you at Zoom. John
OK John I can always cut it down let me know if you cannot find material local
|Hello John Please would you help with any info on G E C Gemini control board. I have tried many times to contact you but struggle with the wordpress system
have I sent you the PI booklet?
No booklet received ,a circuit for the gemini controller would be a great help
send me your email and I will send you what I have.
Does my email address become public?
Yes. Can you suggest another method?