• Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.
  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Ontario GTA West area meetup is planned for Saturday April 26th at Greasemonkeys shop in Aylmer Ontario. If you are interested and haven’t signed up yet, click here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

Search results

  1. pdentrem

    Telescope secondary mirror support system

    Yes. The small white piece is a test to see if there needed a change made. There was! PETG CF glued together with purple primer cleaner and bolts for the uprights. Pierre
  2. pdentrem

    Telescope secondary mirror support system

    https://astrophotographylens.com/blogs/astro/andromeda-galaxy-vs-moon-naked-eye-size-comparison Andromeda is about 5-6 times larger than the moon from our perspective. Our eyes suck at low light seeing. My first scope was a 2.5” Gilbert reflector for $5 at school flea market in 1974. I...
  3. pdentrem

    Telescope secondary mirror support system

    Yeap. Just need 3 dots to glue the mirror. Could of made a triangle piece but a circle was easier.
  4. pdentrem

    Telescope secondary mirror support system

    All the machine work on this part is complete. Now to silicone glue the mirror to the round Kovar piece. Pierre
  5. pdentrem

    Telescope secondary mirror support system

    Expensive and not found on any street corner! We use it for parts in the aviation/space industry. Usually used for metal cover on chips and other electronics. Has to be plated - either 2 layer or best 4 layer. Ni, Au or Ni, Au, Ni, Au. Pierre
  6. pdentrem

    Telescope secondary mirror support system

    Today I spent some time cutting out a 2” disk out of a .125” thick piece of Kovar plate. Kovar and Borosilicate glass have fairly similar CTEs. Chucked in 4J and used a trepanning tool to cut it out. Now I have to drill some holes. Pierre
  7. pdentrem

    King 1440 Lathe Speed plate

    I would say between the photos Luc and I posted you have a good view of the originals. Pierre
  8. pdentrem

    So I've jumped into the rabbit hole

    The yard lights are broken. The posts break or snap off, so I made one for approval from the QC dept when she wakes up in the morning. It can be used with the type that push into the stand or glue the ones that the bottom post broke off. They will be screwed onto the top rail of the ditch guard...
  9. pdentrem

    King 1440 Lathe Speed plate

    These are from my lathe. The Jet BDB 1340A is very much the same. Pierre
  10. pdentrem

    H2D?

    What I do if there is a joint/interface, is to just print the immediate area around the joint to test for fit or lack of. At least at that point, one can modify the model to achieve a better fit before printing for hours and have a failure.
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