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Showing content with the highest reputation since 13/06/20 in Blog Comments

  1. This is a starting point. To date I haven't managed to print an accurate enough escape wheel but I have made improvements to my 3D printer recently so I'm ready to have another go.
    5 points
  2. 2 points
  3. 2 points
  4. You have to forbid them to ever touch your telescope and warn them of unspecified but dire consequences if they take it outside. Tell them that viewing the Orion Nebula is worse that smoking or drinking and no one recovers from it, ever.
    1 point
  5. There's also an Orion course on that site which is good.
    1 point
  6. Hi Nigeboy great images get those pubs open as soon as `Boris says go
    1 point
  7. It's great when the young ones show an interest isn't it!!
    1 point
  8. Excellent. My 16 year old's not interested i'm afraid. He'll have a look at the showpiece objects if i persuade him but soon retreats back indoors.
    1 point
  9. Yes, the material is plastic - PLA in fact. But I have built two working clocks with this material that have proved very successful. This current clock is more demanding and I have found the limitations of the material. This is why I have abandoned the traditional type of escapement for longcase clocks and gone for a much more tolerant type.
    1 point
  10. Been doing a lot of testing trying to find out where this error is coming from and I thing it's poorly defined centre hole. I'm trying a 5mm hole rather than 3mm to see if this helps. A disc printed with a 5mm hole measures up as correct! Failing that I have come across a different form of gravity escapement with 30 "legs" instead of 3 :- https://mb.nawcc.org/threads/30-legged-gravity-escape-clock.148968/ This uses the gravity escape principle without the extra 10:1 gearing needed for the 3 legged version. I quite like the idea of a sweep seconds hand of his design but whether I w
    1 point
  11. Just seen reinforcing plate idea...
    1 point
  12. I would try filleting the inside sharp corners at either side and make the top part larger for increased stability.
    1 point
  13. <Stub is thinking>.......
    1 point
  14. That is wrong. I think I have a clue what I did wrong due to a brain malfunction!!! Yep!! Found it!!! Try counting the teeth in the escape wheel below. From lots of coding with binary numbers there are 32 teeth rather than 30!! DOH!!!
    1 point
  15. When I have moved I will get a food drier to use as a filament drier.
    1 point
  16. It's highly controversial but as a general principle involute gears of any size should be better than traditional clock gears. Actual size really chiefly affects power transfer capacity, friction should not be a big issue with well-formed involute gears - although you could test this.
    1 point
  17. That would let you double the pinion tooth counts and get a better form.
    1 point
  18. Considering I'm printing GT2 timing pulleys very nicely I see no problem with mod 1 spur gears.
    1 point
  19. ATM I'm trying the deadbeat escapement as that need far less work.
    1 point
  20. I've seen it before somewhere. Well, it's a sort of clock...
    1 point
  21. I found this on Thingiverse, apologies if I have posted it before. It took some tweaking to get it to run, I can see the clock will be a much bigger challenge! Apologies for the tongue-in-cheek 'clickbait' video title too!
    1 point
  22. Hi Neil. Yes, that's how it works. Great to see you here.
    1 point
  23. Hi Gina, just to get me following the thread....
    1 point
  24. Absolutely. Looking through Plossl initially confused me as it was very difficult for a newbie like me, let alone completely unaware family mambers, to see anything. Viewing through the Baader piece is so much nicer. I may be losing a little bit of view quality but it still makes it much more accessible.
    1 point
  25. Circuit Diagrams :- Cooling :- The Peltier TEC is run continuously on a low level at about 5v to stop the camera overheating in the thermal insulation. For night viewing, the TEC is run from the full supply of 13.8v switched by a GPIO pin on the RPi. The J438 P-channel MOSFET is turned on via the EL8217 opto-coupler providing the full supply voltage to the TEC. Dew Heater control :- In this case the dew heater is connected directly to the main supply and the return is switched by an N-channel MOSFET (IRLZ44N) to control it. Again the power circuits are isolated from the deli
    1 point
  26. PARTS LIST :- Camera :- ZWO ASI 178MC USB 3.0 Colour Camera Lens :- All Sky Lens for QHY5-II and 1/2 Inch Camera Dome :- 3.5" Clear Acrylic CCTV Dome Case :- 3D Printed Case Sealant :- Gorilla Versatile Mould-Resistant Sealant, Clear Desiccant :- Dry & Dry 10 Gram [25 Packets] Premium Silica Gel Orange Indicating(Orange to Dark Green) Silica Gel Packets Desiccant Dew Heater :- Dew Heater Module - All Sky Camera Peltier TEC :- Peltier Module, 54.6W, 4.4A, 20V, 40 x 40mm Waterblock :- CPU Water Cooling Block, Waterblock Liquid Cooler 50mm
    1 point
  27. 1 point
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