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    Chevy V8 Scale Engine Plane

    I made my crank from bar stock I picked up on Gumtree, the seller said he was quite sure it was 4140, I experienced all of the usual issues crank flexing , chatter etc but I took it real easy I can't recall how much I fed the tool in for each cut but think it was only about 0.005" (about .12mm)...
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    CNC Coil Winder / Cam Grinder

    I was thinking of a a rotary encoder on the main spindle, but my machine is now built and working with a few dozen transformers under it's belt, so if I was going to make a cam grinder I'd probably do it from scratch. The step distance on my winder is set with a 3 digit thumb wheel switch in...
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    CNC Coil Winder / Cam Grinder

    74Sprint- thanks for the explanation, my homebuilt coil winder isn't suitable to use your idea, my main drive spindle is driven by a speed controlled DC motor, rather than a stepper, your idea has merit - food for thought, good luck with your project.
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    Copyright !! Again.

    A bit off topic but :- There is a movie out called Current Wars, worth a watch if the rivalry between Edison and Tesla interests you.
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    CNC Coil Winder / Cam Grinder

    Just wondering how a coil winder could be used as a cam grinder, a cam grinder would be handy, I can't quite picture turning the carriage 90 deg, here is a short video of the coil winder I built a few years back, uses 2 of 18 pin picaxe chips one for the wire traverse stepper and another to do...
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    Copyright !! Again.

    There is no way you can be accused of breach of copyright if you design and build your own version of something you've seen on the internet, in a forum, a museum or even in the engine bay of a car. The majority of engine designs are copies of or based on past existing designs in one way or...
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    Line Boring on a US-Type Lathe

    I recall seeing a youtube video where an 90deg angle plate was bolted down to the cross slide and the engine was bolted to the upright portion of the angle plate - only need to drill and tap 4 holes into the cross slide is that doable in your case ?
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    Unwanted Taper ?

    terryd - thanks for the info on the compound slide setover I was aware that there was an angle somewhere between 2 and 10 that gave 1/10 thou feed on the cutting tool, but never got around to trying it out , I do believe it is a very useful thing to know, I might put up a small note on my...
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    Unwanted Taper ?

    I should have mentioned I usually set the compound rest over to 30deg, so If I need to advance the cutting tool 0.0005" (1/2 thou) for a fine cut I advance the compound rest 0.001", this moves the cutting tool just under 0.0009" towards the head stock and also 0.0005" (1/2 thou) in towards the...
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    Unwanted Taper ?

    Danuzzo: just thinking are you having issues with aluminium ? I noticed in an earlier post you mentioned turning a piece of steel with acceptable results, aluminium can be strange stuff and is known to 'gall' easily I always give aluminium a good squirt with WD40 when machining.
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    Unwanted Taper ?

    I think you are misunderstanding me - when I say a thou I am referring to 1/1000 of an inch or 0.001 inches this is one division on the cross slide so it is do able, I see you are thinking 0.0001 which is a tenth of a thou and you are right I know I couldn't dial in 0.0001.
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    Unwanted Taper ?

    Goldstar31 and fcheslop our ideas seem to differ and that's fine we have all had different experiences and are all entitled to our own opinions. I guess I must work differently to you, and you are probably better machinists than me, I don't think I could have made a decent job of my my Quorn...
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    Unwanted Taper ?

    If the tool is properly sharpened it will cut not rub, with material that is not hard or tough ie 1020 mild steel I have found it easy to take .001" cut.
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    Use a non-contact infrared thermomator as a pyrometer?

    I can't see why not if the device is rated at 2200F, I have one that is rated at 550C I used it a few times to check my kiln when tempering spring wire, works ok but that 550C limit is an issue, one day I'll fit a pyrometer.
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    Unwanted Taper ?

    That .013" cut seems like quite a lot to me, I may be wrong but I always believed that when doing this type of check the smallest depth cut is used to minimise any tool spring, work spring etc. which will affect the results, I would have thought that a few tenths of a thou per cut would be used.
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