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  • 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. JohnW

    My "New" Lathe

    Here is the schematic for the high voltage (240/120V) circuits. I've also attached a higher resolution PDF of this. The 240V spilt phase AC comes in via a standard stove plug that is connected to a pair of 40A breakers in the panel. The connections to L1, L2 and Neutral come in on the bottom...
  2. JohnW

    My "New" Lathe

    So now its time to get heavier into the electrical controls. After thinking about all the controls and switches, I designed the electrics. The actual order was: Fwd / Rev switches - This was pretty obvious 2 micro-switches and an 8-conductor cable back to the control box. I used 8 wire cable...
  3. JohnW

    My "New" Lathe

    Peter: Yes you could do that. If the standard decel would work for you, the sensor switch could just break the motor-enable circuit (I will post the full schematic soon), and that would immediately initiate a 2-second decel. Alternatively, you could change the decal to 0.5sec or something more...
  4. JohnW

    My "New" Lathe

    Here is the next part of the brake mechanism. This is looking through the left hand pedestal from the end. You can see the brake lever from the previous post in the opening. This picture was taken before the braking resistors were installed. They would be in the upper right corner of this...
  5. JohnW

    My "New" Lathe

    The next thing is the brake lever. This is the manual foot brake that runs along the floor under the bed. This is what it looked like after being repaired, painted and installed. The lever is held by a small stub shaft in a bushing on the right side. The left side has an extension shaft that...
  6. JohnW

    My "New" Lathe

    On to the Forward / Neutral / Reverse Lever: I may have posted this image before, but over on the bottom right is the FNR lever. The bottom shaft has a keyway running the length of it. The lever has a key that runs in that keyway to rotate the shaft and then move the shaft on the bottom left of...
  7. JohnW

    My "New" Lathe

    Here is the schematic for the control panel.
  8. JohnW

    My "New" Lathe

    This post is the first of several about the lathe controls in general. Now that I've built it, I'll describe how all the controls work, and then go into how I implemented it all in further posts. I spent a lot of time designing all this, so it might be useful if someone else is considering doing...
  9. JohnW

    My "New" Lathe

    Peter: With braking resistors, the lathe can slow down really fast. It can come to a stop faster than it can accelerate. If it has a 2HP motor (for instance), and it takes 1 second to go from 0 RPM to 1000 RPM on the spindle, it can go from 1000 to 0 in less than 1 second. That is because when...
  10. JohnW

    My "New" Lathe

    And one more quick post for tonight: I have the VFD programmed to run the motor from 6 to 90Hz. The nominal line frequency is 60Hz, and the motor runs at about 1725 RPM with no load at that frequency. Induction motors always run at slightly lower than their nominal RPM in relation to the...
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