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    Yeah, this is a fair point, thanks. I was looking...

    Yeah, this is a fair point, thanks. I was looking at 1150 W, but crept up to 1500 W due to the tiny ($20?) cost difference. I think I'll wait until I get it and take some measurements and likely go...
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    I'm not planning on running the belts at higher...

    I'm not planning on running the belts at higher tension, nor am I planning to run a smaller drive pulley than is stock.
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    Grip is static frictional force, which equals...

    Grip is static frictional force, which equals coefficient of friction multiplied by normal force. It does not depend on surface area.


    That's obvious, but it doesn't explain why the belt is more...
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    While I agree that 600 rpm is too fast for the...

    While I agree that 600 rpm is too fast for the stock drill press on the biggest reduction, it will be 120 rpm @ 10 Hz. I'm replacing the 450 W motor with a 1.5 kW motor to compensate for the torque...
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    Thanks Bob. I was just concerned because it...

    Thanks Bob.

    I was just concerned because it said “control method: VFD, PID”, but I did notice “SVC” in the specs table. I emailed to clarify, and asked if SVC means it does sensorless vector...
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    Thanks for the replies, all. I ended up going...

    Thanks for the replies, all.

    I ended up going with an Optimum Metex 16 mm from here: https://redfoxmachinery.com.au/product/bench-drill-press-16mm-metex-by-optimum-quality-free-keyless-chuck-2/...
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    Thanks for the replies guys, and for the great...

    Thanks for the replies guys, and for the great PDF, BobL!



    Ooh, selling the motor as OEM might be a good option. And you're right – my dad's going through the same with his milling machine and...
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    Round HSS + round bar as big as you can get away...

    Round HSS + round bar as big as you can get away with (= more rigidity). Grub screw for light-duty work or braze for heavy-duty work.



    Easier to drill the cross hole first.
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    Anywhere to buy a drill press without a motor?

    Hi,

    Most drill presses use the standard arrangement of 3x4 (12) or 4x4 (16) speeds, with an intermediate pulley. Ironically, if they had single-stage reductions (4-5 speeds), you might actually...
  10. Thread: Knurling

    by Edd
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    There was a thread here before that basically...

    There was a thread here before that basically proved that it doesn't matter if your material diameter doesn't divide wholly into your knurling wheel diameter. This is because the knurling process...
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    There's another popular video I've seen where the...

    There's another popular video I've seen where the Chinese workers wear no safety gear. They just look away while tacking with a stick welder.

    For a couple of bucks an hour to employ expendable...
  12. Thread: Why

    by Edd
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    A capacitor recently went in our AL340A lathe,...

    A capacitor recently went in our AL340A lathe, and I noticed HAFCO use the cheap electrolytic starter caps. A film capacitor is a LOT better, so we replaced it with a Ducati branded one for about $30...
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    That's awesome! Thanks.

    That's awesome! Thanks.
  14. Thread: HF start box plans

    by Edd
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    That was me - thanks Grahame. I think I...

    That was me - thanks Grahame.

    I think I already linked to that site as that was the one that I used to build it in the end. More discussion was in the thread I created here and the one I linked to...
  15. Thread: T-Clamp sizes?

    by Edd
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    I'd make like the guy who wanted a new kerosene...

    I'd make like the guy who wanted a new kerosene lamp but all he could find was lightbulbs.



    Imperial will - and my generation will kill it. :)
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    Well it really depends. What do you want to do? ...

    Well it really depends. What do you want to do?

    Butane is generally for small, focused flames, useful for pencil torches, soldering, jewellery and the like.

    LPG is better for a bigger flame...
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    Propane and butane are -ane hydrocarbons Propane...

    Propane and butane are -ane hydrocarbons
    Propane = C3H8
    Butane = C4H10

    Acetylene is ethyne (systematic name), ie C2H2. It's not stable unless in solution, so they dissolve it in acetone.
    ...
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    Apologies, I stand corrected. I was just...

    Apologies, I stand corrected.

    I was just sceptical as the common utility single/3 phase voltages around the world are:
    - 277/480
    - 240/415
    - 230/400
    - 220/380
    And I thought therefore there...
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    There's no such thing as 240V three phase......

    There's no such thing as 240V three phase... Unless it's incorrect naming for 3 x 240V phases, which, by convention is called "415V 3 phase".

    240V = RMS phase to neutral (ground) of any phase...
  20. Thread: Welding Helmets

    by Edd
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    You know what shields it even better? A...

    You know what shields it even better?

    A welding helmet.
  21. Thread: Lathe Safety

    by Edd
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    Yep. Leaving the chuck key in seems to be one of...

    Yep. Leaving the chuck key in seems to be one of those things most people eventually do.

    I made the mistake once when I was at high school. It went BANG on the lathe stand and that was it. These...
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    Aluminium oxidises within minutes, then stops, so...

    Aluminium oxidises within minutes, then stops, so it won't really be any duller in a few years time than when brand new. Scratches will reoxidise too - although it will scratch more easily than SS....
  23. Thread: lathe in a box

    by Edd
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    Years? :oo: I thought the yelling came from...

    Years? :oo: I thought the yelling came from spending money on machinery and leaving machinery lying around, NOT from unpacking said machinery? :-

    Looks to be a geared head mini-lathe, where did...
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    A horizontal metal bandsaw is probably easiest....

    A horizontal metal bandsaw is probably easiest. Failing that, something similar to a triton metal cutting drop saw with a TC tipped blade would make short work of it. Or possibly a TC wood saw, as...
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    The four materials for tap and die sets that you...

    The four materials for tap and die sets that you mentioned go in order of weakest to strongest:
    1. Carbon Steel
    2. Alloy Steel
    3. HSS
    4. Tungsten Carbide

    The stronger ones are also more...
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    Hmm, I'd never really thought about it, so I did...

    Hmm, I'd never really thought about it, so I did a search for you.

    Here's a good PDF with typical applications and composition of the main filler types:
    amfiller low alloy wires

    Edit: Just...
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    No, there's significantly less CO2 when you add...

    No, there's significantly less CO2 when you add O2.

    Common gas is 75/25, 80/20 or 85/15 % Ar/CO2

    Better gas is around 93/5/2 % Ar/CO2/O2, which Argoshield Light is. Linde used to sell this...
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    I know that older (or basic) foot pedals have a...

    I know that older (or basic) foot pedals have a potentiometer of some sort, with the machine reading the voltage level to scale the current from x-100%. In this case it would be pretty trivial to...
  29. Thread: Dumb Salesperson

    by Edd
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    A better option would be the salesman saying...

    A better option would be the salesman saying "Okay, that's $5 for the rods. I'll credit it towards the welder if you come back and buy it."

    It's win-win in a business sense, as that way he's not...
  30. Thread: Tig Welder Advice

    by Edd
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    Fronius MagicWave series is excellent. You'd be...

    Fronius MagicWave series is excellent. You'd be looking at a 2200 or 2500 with that budget if you want a new one. I think a 2200 is about $7-8k and a foot pedal is $1k.

    Kemppi are apparently also...
  31. Thread: Screwcutting help

    by Edd
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    Most likely the tool is not sharp enough or too...

    Most likely the tool is not sharp enough or too sharp/scratchy. Try turning a piece of the same diameter with the tool and seeing what surface finish you get. Then try plunging the tool to make a...
  32. Thread: Tig Welder Advice

    by Edd
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    What's that mean exactly? $5000, $10000, $20000?...

    What's that mean exactly? $5000, $10000, $20000? :oo:
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    If you are just after a stick welder, I highly...

    If you are just after a stick welder, I highly recommend the BOC Smootharc 170. I bought one just over a year ago for just under $400 from memory. It has a really good duty cycle* and nice non-stick...
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    barkersegg, could you please post the stuff...

    barkersegg, could you please post the stuff publicly? I'd be interested, as would anyone else looking at this thread who might need help. Thanks.
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    What are all the columns on sheet 1 where you...

    What are all the columns on sheet 1 where you have headings 24, 26, 27, etc, then cells of mainly zeros with a few ones?
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    Well, it's just like he says - and you were on...

    Well, it's just like he says - and you were on the right track with your previous calculations.

    Make sure you definitely have a 3mm leadscrew. Assuming that's the case, it would seem that 0.3,...
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    The following I have typed from Martin Cleeve's...

    The following I have typed from Martin Cleeve's Screwcutting in the Lathe, p81-82:


    Note that the thread chasing dial that he mentions is pictured in the book with 30, 60, 90 & 120 marked 90...
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    Either that or learn to count and remember simple...

    Either that or learn to count and remember simple things. :p

    Sure it can get confusing sometimes, but if you have that much trouble, just write on a piece of paper which numbers/marks you can...
  39. Thread: DIY TIG Welder

    by Edd
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    Update: I've finally finished the HF box, but...

    Update:

    I've finally finished the HF box, but the gas solenoid/relay control box is still a work in progress. I'm pretty much continuing this over at CNCZone in the existing thread, rather than...
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    Bob The Welder (http://www.bobthewelder.com.au)...

    Bob The Welder has hands-down, the best customer service, easy add-to-cart system and reasonable delivery costs. Of the 2-3 emails I've sent Bob, he's replied within a few hours.

    National Welding...
  41. Thread: oxy-acetylene eqpt

    by Edd
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    No problems. It may end up cheaper to buy a basic...

    No problems. It may end up cheaper to buy a basic kit (be it put together by the manufacturer or your welding shop), then to expand things like tips/nozzles later. Most things on the list you will...
  42. Thread: oxy-acetylene eqpt

    by Edd
    Replies
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    I've had some good experience ordering from Bob...

    I've had some good experience ordering from Bob the Welder in the past. He sells 2 reasonably priced Oxy-Acetylene Kits:
    $363
    $401 - BOSS kit with more tips and accessories than the one above
    Also...
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    No, no, it's single phase. 3 phase means that...

    No, no, it's single phase.

    3 phase means that with respect to neutral, you have 3 identical sinusoidal waveforms, out of phase by 120 degrees. In Australia these are 240V RMS phase to ground...
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    Definitely, as you're now talking about permanent...

    Definitely, as you're now talking about permanent internal wiring. It should be left to a qualified, licensed electrician to run one of the active lines over and install a special powerpoint.
    ...
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    Bit more info: 240V is the RMS voltage of a...

    Bit more info:

    240V is the RMS voltage of a phase to neutral connection, which is a sine wave from about -339V to +339V.

    415V is the RMS voltage of any phase to phase connection, so you don't...
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    Either: a) Get the 25k, 16mm linear taper from...

    Either:
    a) Get the 25k, 16mm linear taper from DSE or Jaycar and wire it like a rheostat - ie. center terminal and one outside, depending if you want resistance to increase with clockwise or...
  47. Thread: DIY TIG Welder

    by Edd
    Replies
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    It's 90% done. Unfortunately there was some...

    It's 90% done. Unfortunately there was some problems with the HV coupling due to the type of transformer I used (switchmode neons don't work well with Tesla coils and these sorts of things). As uni...
  48. Thread: DIY TIG Welder

    by Edd
    Replies
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    30,589

    Yeah I figured as much, as it recently came to my...

    Yeah I figured as much, as it recently came to my attention that our lathe (AL340A) has gone up over $1000 since 2005.

    Maybe David Gingery will sell more books because of this. :D
  49. Thread: DIY TIG Welder

    by Edd
    Replies
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    Thanks. :) Yep. It all comes down to what...

    Thanks. :)



    Yep. It all comes down to what you like doing as a hobby. One step back is "Why not just buy a welder?" and a step back again is "Why weld? Just buy what you need already welded or...
  50. Thread: DIY TIG Welder

    by Edd
    Replies
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    30,589

    a) Shouldn't be over a k. No such thing as a...

    a) Shouldn't be over a k. No such thing as a quality 200A inverter TIG unit for $600 with HF start and Solenoid - at least not one I've ever seen. The cheapest *decent* AC/DC machine I've seen is...
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