What's new
What's new
By:
Advanced search…

Search results

  1. D

    Miller deltaweld 450 converted to single phase

    Hi Craig-- Sorry, last 6-7 years have kept me very busy on other things, so I don't get on PM as often. If the schematic you posted is correct for your machine, then it isn't an 'inverter'... but being SCR controlled, they're actually modulating the output by changing the forward switching of...
  2. D

    Help Me Get a 54yo Hyster S80B Forklift Healthy Again

    Okay, so the switch, and the brakes, and the Monotrol system all fall in the same circle. It is NOT for a MicoLock, it's just connected to the transmission's torque converter 'dump' solenoid. The Monotrol is a combination shifter and throttle. The transmission is either in forward, or...
  3. D

    7.5hp 3 phase Lathe want to run off 240v single phase

    Machine Builder- You're responding to a thread that's over a decade old. Your information sources are incorrect. 7.5hp is not 'too big'. The 7.5hp 4-pole Allis-Chalmers motor in the belly of my Monarch 10EE runs great on an old Allen-Bradley 1336 VFD, from 0hz all the way to 215hz. The...
  4. D

    Servo Sizing For 10EE

    There's been more than one 10EE fitted with a servomotor, and one member here posted a video clip of his conversion in a test op... it was ghastly powerful... I've been watching the Teknic drives closely, I have a 10x27 plasma gantry that needs two on the x, one on the y, and one for each Z...
  5. D

    Off road forklift tires? 15x19.5 highway tires.

    It looks that way, but the counterweight is deceptively heavy. That mast is a 5-second collapsable. It tilts that far forward so that it can be transported with significant overhead clearance, and it while it does imbalance the machine, it doesn't do too bad. What DOES make it 'religous', is...
  6. D

    240 Single Phase to 440 3 Phase

    I bring my 240v single phase into a 480:240 dry transformer ('backwards'), and connect the 480v single phase primary to two of the three legs of a 480v VFD, whose 3-phase output is directly connected to the motor leads. Works great, it's silent, and you get great performance, dynamic braking...
  7. D

    Simple 3 phase conversion

    Pardon the trimming, I did that to simplify and clarify how you had it set up. So you're taking incoming 240v single phase from your utility panel, feeding the VFD, then using IT to drive a 240-440v transformer, which powers the spindle motor? The VFD's intended home, is with it's 3-phase...
  8. D

    VFD's "burn up" a motor?

    Greg! Your KBVF still going strong? I got mine in one of the tool grinders, on account that it's small enough to tuck inside the pretty cast base. I put a speed pot through an existing hole in the original steel front panel. I won't say the KB has the jump-and-run of the AB1305 or 1336's...
  9. D

    Miller CP 300TS Haas Kamp Conversion And Questions

    Hi Greg! No, you had it right with jumpers from 36 over to 45- this uses the two in series, with the 208v per leg winding, which is appropriate for what you're doing. Bring the capacitance back down- too much will result in too much current through the center winding, you don't want that. The...
  10. D

    VFD's "burn up" a motor?

    That's a blanket falsehood. I bet the next thing the chatwindow was going to do, was offer you something else... like a 'perfect motor'. As the guys suggested, there are 'some things' that can result from 'some motors' and 'some VFD settings', but you're never gonna see that happen in your...
  11. D

    Simple 3 phase conversion

    Have 3 phase installed in your home, have electricians replace your utility panel and pull a 3-phase receptacle to the machine. Nothing easier, and less complicated, than writing several checks. Anything more will require a bit more dedication to the cause, and it doesn't matter wether it's a...
  12. D

    tear down 10EE backgear

    My '42's gearbox sits waiting for attention. I won't let you give me a set for free, but I'll pay you for one! Send me an address to which I can send adequate compensation and shipping...
  13. D

    Is this a burnt vacuum tube? Bridgeport Servo ecf series 3109

    NE2's were actually great gas discharge tubes... they'd fire off very predictably at what... 82 volts or so. Using them as a 'pilot light' was actually more of a secondary function than a primary.
  14. D

    OT-super capacitor to help lawnmower start?

    I have a buddy with an MTD-made WHITE rider with same problem. This isn't a low voltage, small cable, or valve adjustment problem, it's a failed compression release. As the OP noted, those specific engines suck- they suffer chronic failure of the compression release mechanism. Take the...
  15. D

    Transformer battery spot welder

    13.6v @1300A is 17680w... and to flow that, your total series lead resistance would have to be 0.01046 ohms. Mathematically, that's out-of-reach- your leads would be about six inches long, and the diameter of my wrist. I would expect any instrument making that indication to be errant, either...
  16. D

    RPC pull start issue

    Crash, like others have said, the voltages you see, that's entirely normal. You can hook your lathe to it, and run it with no serious concerns. If you have a mill AND a lathe hooked to it, start one, and just let it spin... and operate the lathe. This makes the mill a second idler, which will...
  17. D

    VFD / Spindle Tripping near by GFCI Outlets

    Harold? Howard? Herbert? One thing you CAN do, that might provide enlightenment, is revisit the 'golden age' of radio, whilst troubleshooting your GFCI trip problem. Turn on the AM radio, place it somewhere near the trippin' outlet. Operate your machine, and listen to all the wonderful...
  18. D

    Off road forklift tires? 15x19.5 highway tires.

  19. D

    Off road forklift tires? 15x19.5 highway tires.

    Here's mine:
  20. D

    Off road forklift tires? 15x19.5 highway tires.

    The IT-60 was designed SPECIFICALLY to be flat towed this way. The mast uses bar-hanging forks, and has flip up clasps to rotate the forks and secure them to the mast. It has headlamp/taillamp assemblies on BOTH ends, with a connector at the chassis, and connection points for a tow-bar with...

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2024 Copyright Practicalmachinist.com. All Rights reserved.

Back
Top