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  1. Replies
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    Seeking - Myford ML7R owner

    Greetings everyone,

    First up this is not for a romantic interlude, so you can relax on that score.

    Last October I bought a Myford Super 7 lathe from Shaw machinery in Brisbane. I have been...
  2. Hi .RC., While I understand that it can be...

    Hi .RC.,

    While I understand that it can be seen that way. That is not really my point.

    In truth I don't give a small furry rodents anus about whether people have a ticket or not. What I do care...
  3. Hi Stu, Not sure I understand your comment...

    Hi Stu,

    Not sure I understand your comment here? My point was that by changing the physical size of the earth pin it prevents bigger loads being plugged into a circuit that may not be rated for...
  4. While I am occassionally sarcastic this was not...

    While I am occassionally sarcastic this was not one of those times. No sarcasm was intended. I really do think you have made a very good decision. I think anyone with the money to put in bigger...
  5. Maybe, maybe not

    So this could be correct. It could be incorrect. I don't have a copy of the AS3000 in front of me. In many cases maximum demand calculations also come into play. Basically maximum demand allows for...
  6. Well this seems to have fired a few people up!...

    Well this seems to have fired a few people up! lol.

    Full disclosure - I'm a sparky who works for the local electrical distribution company, I inspect new switchboards and, all being well, connect...
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    Hi achjimmy, AS3000 has very recently changed...

    Hi achjimmy,

    AS3000 has very recently changed and now stipulates all sub-circuits to be protected by RCDs in residential situations. I'm not sure if each sub-circuit has to have it's own RCD or...
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    Hi Grahame, I have been told, but not yet...

    Hi Grahame,

    I have been told, but not yet tried, that Camphor Laurel has a sufficiently high oil content as to help prevent rust on tools stored in boxes made from it. Can't say whether the...
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    Hi Russ, Yes and no. The mechanical part of...

    Hi Russ,

    Yes and no. The mechanical part of the circuit breaker may trip in that time, after it's received a trip signal.

    However, that trip signal comes from a protection relay. Protection...
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    Hi Dingo, So Malb has pretty much nailed it. I...

    Hi Dingo,

    So Malb has pretty much nailed it. I would just add that it may be possible (although unlikely) for the hedger blade to cut through the insulation and one conductor of the cable, bend it...
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    Hi devarda, I'm glad you bought that machine....

    Hi devarda,

    I'm glad you bought that machine. I was going over the freight costs to get it here and argueing with myself about whether I should buy it or spend the money on moving the shed closer...
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    Hi j3dprints, Welcome to the hiding to nothing...

    Hi j3dprints,

    Welcome to the hiding to nothing game.

    I've priced out batteries, PV panels, 3 phase inverters and charge controller/inverter sufficiently large enough to run mills and lathes of...
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    There is some logic behind the OHS systems and...

    There is some logic behind the OHS systems and not just the obvious.

    If an employee gets injured then the cost of rehabilitation can get seriously out of hand. In the meantime the business is down...
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    Only advantage of a stuffed DSG is that most of...

    Only advantage of a stuffed DSG is that most of the parts are still available or were a couple of years ago. Biggest downside would be cost to get the parts.

    Cheers

    The Beryl Bloke
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    Greetings, I seem to recall that the water...

    Greetings,

    I seem to recall that the water condensation in the reciever tank is now considered "polluted" due to the oil content and there could now be rules and regulations on how you dispose of...
  16. Sorry

    Sorry my bad, you are correct

    Cheers
  17. Greetings, Finally had time to speak my tame...

    Greetings,

    Finally had time to speak my tame engineer today.

    Now that he has had a little time to look at the circuit he repeated his previous comment about connecting the star point of the...
  18. Ok so my engineer acquaintance was back at work...

    Ok so my engineer acquaintance was back at work on Tuesday. I gave him the run down and we drew the circuit out. He very quickly indentified out of balance loading as a possible issue. He expressed...
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    Hi Chris, Titanium can be worked on Sherline...

    Hi Chris,

    Titanium can be worked on Sherline lathes, so your Hercus should be fine.

    The material work hardens so speeds and feeds are important. It also galls (like aluminium and stainless).
    ...
  20. Hi llama, This implies earthing, which I am...

    Hi llama,

    This implies earthing, which I am guessing you will bond to the star point of the auto transformers?


    The judicious use of appropriately rated varisters is likely a good call!
    ...
  21. Hi Jack, I have no technical answer for this...

    Hi Jack,

    I have no technical answer for this one way or the other.

    I was being a bit more adventurous than Llama, I wanted to use the output from the created 3 phase system to trigger on a 3...
  22. I have thought of this setup in the past. I...

    I have thought of this setup in the past. I assume the VFD supplies 3 phases at 240 volts with no neutral? If I have that wrong please correct me.

    Your created "neutral" has no relationship to...
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    I am aware of 6 milling type heads for the FP2....

    I am aware of 6 milling type heads for the FP2. There could be more.

    The "Vertical Spindle Head" is the usually supplied head and has a 40 taper spindle and 2000 rpm top speed.

    The "Boring...
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    Exactly which model Bridgeport are we comparing...

    Exactly which model Bridgeport are we comparing against which model Deckel?

    Is this a general comparison based on say a price point of, say, $6,000 for a second hand machine that might be...
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    I think you guys are all pretty lucky with your...

    I think you guys are all pretty lucky with your rust problems.

    I would be more than willing to swap my mould problems for your rust problems. No more swinging off a ladder 4.5m above the shed...
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    Hi Simon, I have read that in order to...

    Hi Simon,

    I have read that in order to maintain the the calibration a surface plate shold be setup with the same mounting points as were ued to calibrate it. I don't yet have a surface plate so I...
  27. I think that the real reason Amazon has decided...

    I think that the real reason Amazon has decided to go this way has to do with a loss of financial advantage & the cost of software changes should lots of foriegn governments decide to follow...
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    Hi R.C. Go to the top of the class. Yes a...

    Hi R.C.

    Go to the top of the class. Yes a neutral problem.

    Cheers

    The Bery Bloke
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    So Part 2. What could cause this fault? A...

    So Part 2.

    What could cause this fault? A possible cause is an active to neutral short circuit where the neutral conductor burns in two i.e. goes open circuit and the active conductor then welds...
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    When Electrickery goes wrong

    Greetings everyone,

    I was recently sent some photos, by an acquaintence, of issues at a house where things did not go quite as one might think.

    I'll post some photos first then go into a bit of...
  31. Maybe... Maybe not

    The assumption here being that three phase is available to your premises or that you are prepared to pay to have it put on and pay to use it.

    If the high voltage three phase ends before the...
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    Greetings Athos, Welcome to the forum. I...

    Greetings Athos,

    Welcome to the forum.

    I have two cranes in my workshop, and possibly two more to build. My advice is to get an engineer to design this for you. If something goes wrong with a...
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    With respect, How did you come to the conclusion...

    With respect, How did you come to the conclusion that I was disagreeing with Michael??

    I read his post, I agree with what he said. The natural outcome of not being able to cut at the centre of an...
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    Hi Kevin, So to look at this another way.... ...

    Hi Kevin,

    So to look at this another way....

    The likely cost to coat a tool with TiN is in the $1 to $2 range per tool maybe less (during manufacture). If you paid $2.50 for the tool the real...
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    Hi DSEL74, Keeping in mind that this unit will...

    Hi DSEL74,

    Keeping in mind that this unit will be able to take up to 22 or so amps from the mains, you may need a dedicated circuit to run this. Also you would need to check all the cable sizes...
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    Not sure if this is addressed to me, I'll answer...

    Not sure if this is addressed to me, I'll answer it anyway.

    In a low voltage delta system the phase currents flow to and from each phase without reference to a neutral. A 3 phase delta wound motor...
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    Horses for courses. You can drill hard steels...

    Horses for courses.

    You can drill hard steels by regrinding a masonry drill. I'd only do this if I had to drill a hole or two in hard materials, maybe once or twice a year.

    As Pete F points out...
  38. Sorry, I seem to have put that poorly. To quote...

    Sorry, I seem to have put that poorly. To quote the Leadshine blurb "The system includes a 2-phase stepper motor combined with a fully digital, high performance drive and an internal encoder which...
  39. Closed loop steppers

    Hey Roger,

    In this case the controllers are designed for closed loop with inputs from the encoders. Thus no lost position if a step is missed. Similar to a servo system in that regard, though very...
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    "Dirty" power

    Well it's not just the PV inverters. Everything has a non-linear switchmode power supply because they are cheaper. When was the last time anyone here bought an item with a step down\up transformer &...
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    Low voltage Solar to high voltage

    Hi Simon,

    The previous normal power flow was that it was generated in large power stations and then stepped up to 132,000 volt (or 275,000 volt) transmission lines. Those lines are the backbone of...
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    Hi Jack620, The longer term correlation...

    Hi Jack620,

    The longer term correlation between your inverter's output and the voltage is masked by the power network's operation. The network operators employ automatic voltage control that...
  43. Hi Pete, With regards to actual costs of...

    Hi Pete,

    With regards to actual costs of building CNC equipment....

    It's a bit of a how long is a piece of string... so below are my thoughts on the process with my Sherlines. Yes small but do...
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    Hi Axebrigade, So as one sparky to another,...

    Hi Axebrigade,

    So as one sparky to another, I'd go with a set of cobalt drills for the stainless, they will drill lesser material also. A bit more brittle than HSS but better able to handle the...
  45. Sticky: Ah, but is he wearing a red shirt, or not?! :)

    Ah, but is he wearing a red shirt, or not?! :)
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    This is true for conventional sharpening. For...

    This is true for conventional sharpening. For more " modern" (for want of a better term) sharpenings the variations in how the clearance face/angles are shaped results in split points and the...
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    Hi Cesium, Very likely a bead blasted surface...

    Hi Cesium,

    Very likely a bead blasted surface under there. An alternative might be to chemically etch the alloy surface. "Ali-brite" is a product that comes to mind. Use extreme caution as this is...
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    Hi Michael, The above would be the crux of the...

    Hi Michael,

    The above would be the crux of the matter, if it were me. I would not want to lug heavy metal from one rental to another, always being concerned that the new rental has enough space...
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    Hi Michael, Sherline produce ER16 headstocks...

    Hi Michael,

    Sherline produce ER16 headstocks for use on their lathes and mills. They have a range of 3 and 4 jaw chucks with native threading to suit ER16 spindles. The ones I found are 3.1" dia....
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    Shocks

    There are any number of reasons why you might get a shock. I have investigated quite a few shocks. I strongly suggest you contact a good elecrician and get them to come around and do some testing for...
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