Recent content by prof65

Some ebay vendors are just cheating. They sell you a 1300 C digital thermometer, but the cheap thermocouple that come with it has a very limited temperature range (usually 150 or 200 C). 1300 C is the maximum range of the thermometer, NOT the probe (sometime they forget to mention this...). For...

My VFD (Toshiba VF-nC3) has a menu for setting internal or external command mode (0 = terminal, 1 = panel keyboard, 2 = RS485). Default setting is 1, I had to set it to 0 to use external switches and potentiometers.

Hi Chuck, sometimes, when you use cut and paste you can include some "invisible" chars (newlines, strange symbols...); the editor doesn't show them but they are here and the compiler generates a syntax error. If you completely delete the line and rewrite it by hand, without using cut and paste...

Hi ShopShoe I'm currently building this engine at 150% with some mods to the original design. Not difficult at all, and you can add lots of details at this scale. Go for it. Roberto

Maybe a thin saw blade like this: http://www.proxxon-tools.com/tools/Proxxon-Spiral-Toothed-Fretsaw-Blades.html I own some of these blades, I will try a test cut this afternoon. Roberto

Nice work, simple but effective. I like it.

Hi Karl and welcome. Take a look at this site, most of Elmer's engines are a great choice for a first build: http://www.john-tom.com/html/ElmersEngines.html Hope to see some pics of your first runner soon. Roberto

Great work ned, it looks like a real engine. Love your attention to details. Roberto

Hi Chuck A simple way for testing a stepper driver: - connect +5V, +24V and GND to a power supply - connect Enable to GND - connect a wire to Pulse and repeatedly touch +5V and GND with the free end of the wire - if the stepper motor doesn't move, connect Enable to +5V and try again - connect...

I see the same thing randomly, some link works, some doesn't. I'm alwais logged in. Roberto

Good start. I like all Elmer's engines because they are well designed and easy to build. I'm sure you will have a nice runner soon. Cheers Roberto

Hi Goran It's hard to help you without a couple of pics of the cross slide and the rotary table... Roberto

When I read "how many possible combinations with six pieces" I immediately recalled my statistical studies and posted a reply without worrying about what a "burr puzzle" is (my fault). :hDe: 720 is just the number of possibile different "anagrams" (like Wikipedia calls them) that we can build...

Hi Chris, here are some tools that could help you: A "long nose" revolving centre (third from top): www.rdgtools.co.uk/acatalog/2MT_REVOLVING_CENTRE_SECTION.html A small diameter revolving centre (top of page): http://www.arceurotrade.co.uk/Catalogue/Centres Extension sockets...

Lots of info here, if you are brave :D en.wikipedia.org/wiki/Permutation