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Type: Posts; User: BobL

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  1. Replies
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    I do the grocery shopping, most of the washing,...

    I do the grocery shopping, most of the washing, and most of the day to day cooking because I want to control what is cooked to help keep blood sugars under control.
    I service the robot vac and empty...
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    I did a distance measurement on google earth and...

    I did a distance measurement on google earth and it's 300 odd meters difference, 700 for me and 400 for you. The other thing that might make a difference is the size of the land blocks. Where we are...
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    I'm usually finishing up cooking tea so TV time...

    I'm usually finishing up cooking tea so TV time works for me but don't forget there's iview. which is how SWMBO watches it, Its one of very few TV programs SWMBO and I are both interested in, for me...
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    I'm starting to think your shed's brick walls...

    I'm starting to think your shed's brick walls might the culprit and might be giving off something that adds to the moisture and creates a more corrosive environment inside your shed.

    One...
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    One week on PAed pieces have been outside under...

    One week on
    PAed pieces have been outside under back veranda and it has rained a fair bit in the last few days.

    No sign of any rust on the second from the left piece (stripped back to bare steel...
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    For anyone that is interested on the woodies...

    For anyone that is interested on the woodies forum I do a bit of a side by side comparison with a couple of Powtran models and comparable power HYs.
    VFD install summaries - Page 7
  7. Just realised where you hail from - Nice area! I...

    Just realised where you hail from - Nice area!
    I spent 3 months working in Calgary in 2010.
    On the way there we took the Rocky Mountaineer from Vancouver and spent most of our weekends in BC and...
  8. This should have reversed the direction of the...

    This should have reversed the direction of the motor. The phases can be connected in any order and it should run. Then reversing any two phases should reverse the direction of the motor.



    Was...
  9. If itís only a 1500rpm or thereabouts these fans...

    If itís only a 1500rpm or thereabouts these fans are also easy enough to make.
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    I've done it a few times with VFDs - it just...

    I've done it a few times with VFDs - it just decelerates the motor and then accelerates it the other way. EXCEPT if you have selected a "coast to stop" - then it tries to send motor in reverse while...
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    They are probably out there. An alternative if...

    They are probably out there.
    An alternative if it works for you would be an auto reverse on hitting a limit switch. You'd need a lockable chuck.
    If a brake is going to be applied automatically it...
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    Yep, given I can stall a 4HP motor with a simple...

    Yep, given I can stall a 4HP motor with a simple (hand) brake on my HP measurement rig. Because they are connected to a VFD during the braking the VFD eventually trips but it's not quite as quick as...
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    What Steel Michael?

    What Steel Michael?
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    I wouldn't use anything as it might disturb the...

    I wouldn't use anything as it might disturb the phosphate layer, even water might initiate rust

    Suggested after treatments (in order)
    - wipe off excess PA with a cloth
    - blow dry cavities...
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    That CI handle looks fantastic Bob - must try...

    That CI handle looks fantastic Bob - must try some out.

    In terms of my testing for PA longevity I found the results of the testing I did in 2015 and it lasted about a week outside (undercover)...
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    The next thing you can do is see if you can find...

    The next thing you can do is see if you can find some pipe that is almost the same size and cut a ring from it.
    If it is larger that the hub remove a segment from the ring close it up in a vice and...
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    Sorry don't know the official name. I call them...

    Sorry don't know the official name. I call them swivel handles because that's what the square drive socket handles are called.
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    For this purpose I would go to a steel/scrap...

    For this purpose I would go to a steel/scrap merchant and buy a short section of black pipe and cut a piece of that.
    Where I like the pipe lengths are typically from 200 mm upwards and cost AUS$1 a...
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    Most likely it would trip. The way around this...

    Most likely it would trip. The way around this would be to set the VFD to a "coast to stop"mode and when you hit the brake it triggers a micro switch that turns off the VFD. This is how I set up my...
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    I'll leave it to AB to do the other steels, I...

    I'll leave it to AB to do the other steels, I just wanted to see (very) quickly what would happen with mild steel.

    These are my starting pieces.
    They are the same pieces I used to do the various...
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    Have you tried the newer stuff yet? Just a...

    Have you tried the newer stuff yet?

    Just a heads up that the newer stuff is no longer just phosphoric acid and water.
    The MSDS says it contains 30-60% phosphoric acid, < 10% CITRIC Acid plus a...
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    I agree some places do take the , but some have a...

    I agree some places do take the , but some have a minimum charge materials formulas which office lackies just follow blindly.
    Other places can charge depending on their current workload.
    If they...
  23. Thread: Rust ?

    by BobL
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    Thanks for the pictures BJ I see by the...

    Thanks for the pictures BJ

    I see by the ingredients that it was reconstituted juice with an added preservative so the strength could be anything, but being Italian, my guess would less than...
  24. Thread: Rust ?

    by BobL
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    If you didn't dilute it then I am surprised it...

    If you didn't dilute it then I am surprised it took as log as it did. Maybe there's something in the natural juice that slows things down a bit?
  25. Thread: Rust ?

    by BobL
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    I like it! You don't mention your dilution...

    I like it!

    You don't mention your dilution factor but pure lemon juice contains about 5% by weight of citric acid (C6H2O7 ) so if you diluted it by say a factor of 5 then you would own to ~1%...
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    Can't see why not. I use a home made...

    Can't see why not.

    I use a home made mechanical disc brake for my WW bandsaw.
    The disc turned up out of a Bisalloy plate and it's so massive it barely gets warm even after multiple stops - this...
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    Powtran stopped using Paypal when PayPal would...

    Powtran stopped using Paypal when PayPal would not conduct transactions in Chinese currency and wanted everything done in US$. This required Powtran (all Chinese companies) to wear a hefty minimum...
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    This is a bit of a how long is a piece of string...

    This is a bit of a how long is a piece of string question. The degree of restoration possible depends on what you buy, your skills, access to machining equipment, local access to machining gurus etc....
  29. I've also seen these in the flesh so to speak and...

    I've also seen these in the flesh so to speak and can confirm they look every bit as good as the photos.
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    Provided the same grinding wheel materials are...

    Provided the same grinding wheel materials are used, as well as optimal cutting speeds, the specced max RPMs for wheels are related to the forces involved required to hold the wheel together.
    The...
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    Last I heard was Powtran no longer did PayPal,...

    Last I heard was Powtran no longer did PayPal, you have to use Western Union.
    Maybe the have restarted using PayPal.
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    Here is a 50mm...

    Here is a 50mm
    https://www.machineryhouse.com.au/Q510
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    Here's an 80mm...

    Here's an 80mm
    https://www.machineryhouse.com.au/Q5105

    Here's Mitzy https://www.ebay.com.au/itm/Mitutoyo-3060S-19-Dial-Indicator-80mm-0-01mm/141880459459?hash=item2108bc00c3:g:WRAAAOSwv0tU9HHL
    ...
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    Starts when machine motor is running otherwise...

    Starts when machine motor is running otherwise it's off. Fan is also very quiet.
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    The Josco ceramic flap discs can have the worn...

    The Josco ceramic flap discs can have the worn outer edges of the flaps and plastic backing disc pared back to expose fresh flap edges. I wonder if a 115 mm disc could be pared back enough to fit on...
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    Firstly welcome aboard. I also like old...

    Firstly welcome aboard.



    I also like old gear but (as we have been asked to do) that abrasive wheel hanging out on that extended spindle has my eyebrows raised. There's a good reason grinding...
  37. If the outlets were on the same circuit line...

    If the outlets were on the same circuit line you'd just blow the breaker when the breaker current was exceeded. This is as it should be as the breaker is there to protect the lines.

    If they were...
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    Josco used to make them because when I last...

    Josco used to make them because when I last bought my 125mm discs at bunnings a few months ago there were boxes full of the 100mm on special for next to nothing which sort of agrees with your second...
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    Plus one for ceramic pads and flap wheels. I've...

    Plus one for ceramic pads and flap wheels.
    I've had success with the Josco ceramic wheels.
    The 60 grit wheels perform like 40 grit standard wheels and the 80's perform like the 60 grit standards.
  40. No exactly what you are asking but strongly...

    No exactly what you are asking but strongly related.
    If you know what you are doing you can run a 3Phase machines on a VFD on a smaller current rated GPO.

    For example:
    My Dust collector runs a...
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    Grit comes in various forms. The coarse stuff...

    Grit comes in various forms. The coarse stuff which settles out in seconds or minutes can be protected by machine covers, but the finer stuff like wheel resins and welding soots can be invisible and...
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    Ideally I reckon its a good idea to be able to...

    Ideally I reckon its a good idea to be able to walk (or at least squeeze) your way all around it if you can.
    If not, leave some room so you can at least reach in behind to pick yo stuff that falls...
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    Just a heads up that odourless kero has the same...

    Just a heads up that odourless kero has the same OHS issues including exposure limits etc as ordinary kero. The low odour might in some situations even make it more dangerous than normal kero as the...
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    I've had the pleasure of seeing these two gizmos...

    I've had the pleasure of seeing these two gizmos close up and feeling how well they all slide together and hence can report that Bob has done a really great job on the machining and assembly.
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    'I'm the same with Kero and was using the other...

    'I'm the same with Kero and was using the other day to turn some acrylic but I got away with it because of the ventilation I have in my shed.

    For me kero aroma reminds me of a holiday as a kid...
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    Our local recycling centre (used to be called a...

    Our local recycling centre (used to be called a waste transfer station, but we are not allowed to call it that now) takes "oil" as long as it is in no bigger than 5L containers. I've disposed of all...
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    Sure - Mine is 150mm in diameter and has a 100mm...

    Sure - Mine is 150mm in diameter and has a 100mm diameter x 10mm thick steel disk behind it that acts as a big washer for the CBN wheel.
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    If you only just take a small chip of the end of...

    If you only just take a small chip of the end of the insert and its accessible enough I've found I don't have to throw it away and can usually reform the tip with my diamond wheel. OK it won't have...
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    They are quite expensive but don't required...

    They are quite expensive but don't required dressing and don't wear away like standard abrasive wheels so don't change size. With the base wheel being made of steel heat is readily conducted away...
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    Cubic Boron Nitride - it's for HSS.

    Cubic Boron Nitride - it's for HSS.
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