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  1. I know Sparky bashing is a popular pastime....

    I know Sparky bashing is a popular pastime. Especially in Australia with our restricted practices but is there any evidence that this character was even qualified. The work may have been performed by...
  2. Your right about the cable coming directly to the...

    Your right about the cable coming directly to the distribution board. Subcircuit protection is required (no choice there). Also there's no way I would be using a fuse these days. Suitable circuit...
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    Inductance may play some part but Ohms law should...

    Inductance may play some part but Ohms law should still predict the maximum possible stalled armature current. As motor speed increases current will reduce due to back EMF.
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    Perhaps that's a fair comment. I'm particularly...

    Perhaps that's a fair comment. I'm particularly impressed with their molding, pattern making and casting skills but I do shake my head when someone welds material in the lathe chuck with no proper...
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    Bunyadust, I certainly do remember the name. No...

    Bunyadust, I certainly do remember the name. No idea when they may have closed up shop.

    There's no shortage of YouTube video's showing formerly precise machine tools being beaten to death in a...
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    Big Planer (very sad sight)

    I've not posted much lately. Lots of other things going on at the moment.

    A couple of days ago I visited an old engineering business on the outskirts of Rockhampton. The owner has been deceased ...
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    Do you know anyone in the water/sewer utilities...

    Do you know anyone in the water/sewer utilities game. Might be an old one lying around.

    https://ferrum.com.au/products/manhole-cover?variant=41914956873914


    These usually have substantial...
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    This will probably upset the engineering purists...

    This will probably upset the engineering purists here but I would be happy to forgo the torque wrench for the cam cover bolts.

    If your competent enough to change a head gasket you can judge what...
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    Hi Steve. If your just wanting some practice to...

    Hi Steve. If your just wanting some practice to get a feel for scraping you could get one of the small plates from Carbatec. Only 300 x 230mm but quite handy. It's what I started with before getting...
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    Well I'm 20 years older than you and that's...

    Well I'm 20 years older than you and that's exactly how I was taught to remember it.
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    C'mon Richard. You know the deal. Pictures or it...

    C'mon Richard. You know the deal. Pictures or it didn't happen.:)
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    Jack stands (Standing the test of time)

    I was thinking about the jack stands I was using the other day.

    402013

    I got these from my father about 10 years ago and I believe he had them since the mid 60's
    He had a good friend who was a...
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    One issue might be the internal wire sizing for...

    One issue might be the internal wire sizing for the start winding vs the run winding potentially causing overheating under actual loaded conditions.

    John
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    Generally only single phase motors have...

    Generally only single phase motors have thermal/overload protection built in as they are usually plugged into a GPO. Three phase motors may have an inbuilt thermal switch or thermistor requiring a...
  15. Hi Baron. Did a quick check on my cheap unit....

    Hi Baron. Did a quick check on my cheap unit. Input screw traveled 49mm for an output travel of 14mm which works out at 3.5 multiplication. OD of the whole unit is about 38mm. Hope this helps. John
  16. I bought the TTI branded puller kit from Total...

    I bought the TTI branded puller kit from Total Tools. Rated force is 10 tons. I managed to shatter a bearing outer race while working on my old ride on mower so no shortage of power.

    No doubt it's...
  17. [QUOTE=Karl Robbers;2004065]Whatever you do as...

    [QUOTE=Karl Robbers;2004065]Whatever you do as far as design and construction, I would strongly urge you to establish the maximum load allowable, both overall and point loading and then clearly mark...
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    Hi Richard. I haven't built one of those but I...

    Hi Richard. I haven't built one of those but I did play around with induction heating and melting nearly 15 years ago. I had some limited success heating steel to red heat and melting some aluminium...
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    :whs: John

    :whs:

    John
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    Hi Chris. The NRV is usually screwed into the...

    Hi Chris. The NRV is usually screwed into the tank and connects to the compressor heads via a pipe (10-12mm dia). A smaller sometimes flexible hose runs from the NRV back to the pressure...
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    I assume it wasn't a fault with the non return...

    I assume it wasn't a fault with the non return valve then.

    https://metalworkforums.com/f65/t207943-compressor-issue
  22. Thread: Lathe Info

    by GuzziJohn
    Replies
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    19,532

    Sounds like your perfectly qualified to be on...

    Sounds like your perfectly qualified to be on this site
  23. Thread: Mars Planer

    by GuzziJohn
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    13,303

    I made some improvements to the clapper box this...

    I made some improvements to the clapper box this afternoon. The original mounting must have been misplaced when it had the "spindle" installed.
    I also need to sort out some t slot clamps. Lucky I...
  24. Thread: Mars Planer

    by GuzziJohn
    Replies
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    13,303

    It's Alive

    So it's bit just short of 3 years since I last posted regarding the planer.
    We've had a bushfires and a hail storm but there's no excuse for it taking that long.

    Anyway I needed a nice straight...
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    3.8:1 reduction applied twice. Wouldn't that...

    3.8:1 reduction applied twice. Wouldn't that result in about 14.5:1 reduction
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    It's possible that the non return valve between...

    It's possible that the non return valve between the pump head and tank is not sealing.
    Instead of just releasing the pressure in the compressor section to allow easy restarting tank pressure is...
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    Nice, but I vote for a 90 degree V twin. :U

    Nice, but I vote for a 90 degree V twin. :U
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    1971- It was a good year

    Have recently finished a bit of a tidy up and rework on an XY Ford (joint project of my brother and I).
    Soon to recommence work on one of my Datsun 1600s.


    395359


    I painted the engine bay...
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    If you mean the carb body, there were existing...

    If you mean the carb body, there were existing worn out factory bushes. These were removed and the new material installed.

    John
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    I went through a similar exercise ...

    I went through a similar exercise

    https://metalworkforums.com/f303/t201152-rebushing-carbys

    After 4 years you might think I could provide some feedback on suitability of material.

    Sorry....
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    Hey! I resemble that remark:U John

    Hey! I resemble that remark:U

    John
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    2 speed motors come in a variety of flavors....

    2 speed motors come in a variety of flavors. Maybe a pic of the motor nameplate may assist. The VFD shown is a 220 volt out and the motor may require 400-440 in its current configuration.
    John
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    Worth it just for the vise :)

    Worth it just for the vise :)
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    Friday night Youtube

    For a while now I have been watching YouTube videos from Cutting Edge Engineering.

    https://www.youtube.com/channel/UC2wdo5vU7bPBNzyC2nnwmNQ

    They mainly deal with hydraulic cylinder repairs and...
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    Must be some pretty special gearbox:U

    Must be some pretty special gearbox:U
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    Bob's spot on. I sand cast a 100mm piece of bar...

    Bob's spot on. I sand cast a 100mm piece of bar stock once and the porosity was much worse than I had expected. Might have been poor melting technique or dirty scrap. I think the other important...
  37. I presume these drives have a voltage doubling...

    I presume these drives have a voltage doubling circuit as the input rectifier. This does place heavy stress on the filter capacitors, requiring more to share the load.
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    It's not unknown for rental cylinders to fall out...

    It's not unknown for rental cylinders to fall out of the system so it may still be "owned" by someone else.

    There is a gas supplier in Rockhampton who advertise that they will exchange any...
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    Lots of good video's on the NFSA channel. John

    Lots of good video's on the NFSA channel.

    John
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    Apprentice Training Video

    https://youtu.be/ES4ktRAzyPY?t=1

    If like me, you have a tendency to look back to our industrial past with rose tinted glasses you might enjoy this video.

    Some machining content so not...
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    As cunning as a fox who’s just been appointed...

    As cunning as a fox who’s just been appointed Professor of Cunning at Oxford University?
  42. Same as a 3 phase input VSD. Reversed either with...

    Same as a 3 phase input VSD. Reversed either with a parameter selection in the drive or swap any 2 of the motor connections.
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    Dick has a different view of what happened. ...

    Dick has a different view of what happened.

    https://www.dicksmithfairgo.com.au/why-dick-smith-electronics-imported-why-i-support-aussie-farmers/

    As they say, there's two sides to a story.
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    Welcome to a usually helpful forum. If you put...

    Welcome to a usually helpful forum. If you put your location as something more specific than "Australia" you might avoid the razor sharp wit of some member.
  45. Thread: VFD outputs

    by GuzziJohn
    Replies
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    17,181

    Let it go Bob. OP's happier without questions.

    Let it go Bob. OP's happier without questions.
  46. Thread: VFD outputs

    by GuzziJohn
    Replies
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    17,181

    Thanks for the update. Some other suggestion- I...

    Thanks for the update. Some other suggestion- I think you said the motor runs ok mechanically unloaded in delta.
    If you set a ramp of say 10 seconds does the motor actually accelerate steadily over...
  47. Thread: VFD outputs

    by GuzziJohn
    Replies
    53
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    17,181

    Just to eliminate any confusion on my part is the...

    Just to eliminate any confusion on my part is the VFD always connected to the motor and then the start command given, and the drive trips, or is the VFD started, ramp completed and then some time...
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    With that list of Bathurst winners I'm guessing...

    With that list of Bathurst winners I'm guessing there's a Ford in the shed as well.
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    Hard to beat the classic look of webers....

    Hard to beat the classic look of webers. Definitely worth the effort.
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    I'm sure you can figure it out. That lazy...

    I'm sure you can figure it out.

    That lazy electrician has nearly finished wiring my shed. Lights done. Some power circuits in. Hoist going up and down.

    No planer or lathe going yet:(
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