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  1. Replies
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    2,213

    Modern VFD's have an "autotune" feature that...

    Modern VFD's have an "autotune" feature that allows the VFD to set parameters like carrier frequency to suit the motor. This measures the motor's inductance among other things and prevents the...
  2. I was using a friend's 1980's vintage 415V stick...

    I was using a friend's 1980's vintage 415V stick welder last month: a CIG "Contractor" which I think is a licensed version of a Lincoln design. It struck a few sparks without the ground clamp...
  3. I had to take out the slop in the selection...

    I had to take out the slop in the selection linkages and then braze up the wear in the bronze selector fork before adjusting the clutches. It has the same issues with finding a true neutral position....
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    I'm seriously thinking of getting a measles shot...

    I'm seriously thinking of getting a measles shot after it was proven to damage your immune system on two different ways:

    Measles wipes out immune system's memory, study finds | Science | The...
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    1,409

    There are some double sided tapes from companies...

    There are some double sided tapes from companies like 3M that are used to bond aluminium to aluminium and are quite strong but require a freshly bead blasted surface less than 30 minutes old to bond...
  6. I had a bit of a think about it while going for a...

    I had a bit of a think about it while going for a walk this afternoon and came to a similar conclusion. I'm not a big fan of sisal packing after seeing marine prop shafts get chewed up by sisal and...
  7. Oil lube for low speed spindle with angular contact bearings

    So I'm planning on making a vertical hollow spindle with two 7318 angular contact bearings with a 90mm bore and I'm looking for lubrication ideas. It's going to be a sand mixing machine that dumps...
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    I see some blood pressure medications have a...

    I see some blood pressure medications have a secondary use to help control ADHD as well. My point about drug use in general is that they almost without exception have side effects of some kind. If...
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    I read an interesting article about a young woman...

    I read an interesting article about a young woman at university who took some ADHD drugs in a recreational party environment: all of a sudden everything came into sharp focus and her level of mental...
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    Sounds like a classic ADHD case......mix some...

    Sounds like a classic ADHD case......mix some Ritalin in with the workshop instant coffee.
  11. Replies
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    1,231

    All those aluminized front surface mirrors get...

    All those aluminized front surface mirrors get destroyed over the next few months after a fire, either from water or from powder extinguishers causing corrosion, even the lens antireflection coatings...
  12. Looks like the solvent used to clean the metal...

    Looks like the solvent used to clean the metal evaporated and caused condensation in a hot humid environment.
  13. Replies
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    1,231

    I saw a 1 week old $10K photocopier that had...

    I saw a 1 week old $10K photocopier that had smoke damage, there was dark tar-like deposits all over the internal sheet metal, optics and electronics. Over time, the deposits corroded everything. If...
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    Some of the Colchester clones cut costs by...

    Some of the Colchester clones cut costs by leaving out the forward-reversing clutch assembly and simply reversed the motor. This meant that trying to perform an instant reverse of the spindle like a...
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    1,128

    Some of the woodworking machines like those made...

    Some of the woodworking machines like those made by Wadkin had truly massive motors with tiny horsepower specs as they were 8 or 16 pole or something like that. In fact if anyone has connection data...
  16. Replies
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    1,103

    I did watch that video from start to finish (and...

    I did watch that video from start to finish (and enjoyed it), it looks like older methods of battery repair survive to this day: the technique of using a carbon arc rod to melt lead on a battery...
  17. Replies
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    That's how we used to join the terminals for 48...

    That's how we used to join the terminals for 48 Volt strings of telephone exchange batteries, you'd bolt one terminal to the next cell's terminal and then clamp a mould made from aluminium angle to...
  18. Replies
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    I've heard of a pump at a mine site being powered...

    I've heard of a pump at a mine site being powered off junk pile 2, 3 and 5 Hp motors, they were all the same RPM and were connected to the pump via belts and pulleys. A clamp meter confirmed they...
  19. Replies
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    They are mostly BS, there are plenty of tests on...

    They are mostly BS, there are plenty of tests on Youtube where the rats ignore the devices to eat seeds beside them.
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    It'll be gone for good soon: I hear developers...

    It'll be gone for good soon: I hear developers are going to build a block of units on the site. Here's another photo of the derrick in the background while a transport boat is being built for the US...
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    Apologies if I've posted this before, this is...

    Apologies if I've posted this before, this is photo from a local sawmill that's about 140 years old in that location. There 's a railway siding at the base of this equipment and a riveted boiler at...
  22. Isn't it kind if de rigeur to have an old stereo...

    Isn't it kind if de rigeur to have an old stereo / speaker combination that looks like it was found in a skip bin for the workshop?. In the 1970's it would have been a valve AM radio bare chassis...
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    When I read the title, I thought it was one of...

    When I read the title, I thought it was one of these experiments:

    http://forgetomori.com/wp-content/uploads/2011/03/cyborg.jpg
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    You can "see" infrared light sources by using...

    You can "see" infrared light sources by using your mobile phone camera as it has some infrared response even with the built in filters. This is a great way to see if your TV remote is faulty and...
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    Try pulling the bronze nut for the cross slide...

    Try pulling the bronze nut for the cross slide screw out, rotating it 180 degrees and reinstalling it (if it's possible for that model), it can make the screw stiff if misaligned. Also it's possible...
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