The Secret Society of Lathe Trolls

I also would totally spin you some and send them to you if you send me a drawing! I'd be happy to return a favor.

Hey Bryan, I've been following your updates, very exciting! The spin method has been really fun to play with. I'm still working on those tools but have been getting good results with the beverage can aluminium regardless of trying a number of different gauges of aluminium. It's quite easy to tear th...

Made progress today with the spinning tools. Im working in two main roller tools so far, the photo shows the roller-head and the steel handle that will be installed on each. These will accommodate a fine and course-point wheel I will make soon. I have not tracked down any information on spinning on ...

Nice!! Turned out really nicely. The text looks gooooooddd!!

Please, engineers or physicians out there, clear this up for me. Do I have this right? Physicians are Doctors. Physicists would be the group to ask. You can rest assured that Physicists would agree with me. Not sure about Physicians... 8) The coil provides zero force. The magnetic fields supply the...

What Markrob is not considering is the fact that it is not wave propagation at that point but Newtonian physics that is inducing the feedback current so the calculation is irrelevant here. Regardless of if there has been prior discussion on a topic, that doesn't mean that there isn't yet undiscover...

Awesome work, Bryan! Just a bit of tangental discussion to clear up here: Physics would care to disagree with part of this statment, fyi. Imagine you have a rod measuring 12" in length. You put a mark at 6" and another at 10" from one end of the rod. You place two cameras over each mark with a dista...

opcode66 wrote:
Not quite as simple as saying aluminum bobbin.... There is a trick to it to avoid eddy currents in the aluminum that will negate high frequencies. The aluminum will fight the drive coil.

https://en.wikipedia.org/wiki/Eddy_current

Copper shorting ring

For those who are interested in the details of this process, here are two helpful documents: Popular Mechanics Handbook : Metal Spinning - Prof. Fred D Crawshaw [c. 1909] https://archive.org/details/metalspinning00crawuoft Machinery's Reference Series : Metal Spinning - Tuells, Painter, and William ...

Hey friend,

Have you tried making the bottom-most portion aluminium? This might help saturate the flux where you want it, in that gap.

Try it our on the simulator and see if it does anything!

Hey folks, It's been a while since I've updated my progress here but let me assure you it has not stopped! Heavy course load last semester really slowed me down, but now I'm full steam ahead working on a feedback cutterhead. I'm excited to share some of my discoveries over the next little while and ...

wow u live in Montreal? im like 45 minutes away from you! i have 2 Mongomery Ward airline lathes with burnt heads, been looking for someone who knows about coil winding, which u clearly do...is it possible we could hook up at some point and i could show you the heads, see if u can help me get them ...

be prepared for the dust!!!!!!!

Hey!

I think the winding machine 1.25 overlap gcode method sounds great!

Maybe you could get some PVA filament, wind the coil, dissolve the bobbin in water!!!

<3

Thanks for sharing these photos marct!

Here we go!!! Select photos [duplicate views reduced or removed].

Thanks for the tip and keep them coming! Hey Todd, here are two more things I'de like to share with you because they make my machining practice a lot more peaceful: -This 'chuck spider' from a fellow on thingiverse is helpful for positioning parts during repetitious work: http://www.thingiverse.com...

Looking good!! You must be very happy to have a lathe now! If I may lend one potentially obvious piece of advice, it is this: The tool geometry specific to each material makes a huge difference in how smoothly the cut is made. With correct tool geometry [for the material being machined], very little...