The Secret Society of Lathe Trolls

Improved precision brass piston and sleeve. Improved tonearm rest and lock. Center pin now with threaded hole in center top for disc locking attachment. 100 Hz strobe for Technics platter. And, overhead locking feet. Photo Oct 28, 12 55 03 AM.jpg Photo Oct 28, 1 34 18 AM.jpg Photo Oct 28, 1 34 23 AM...

Taiwan Full Rebuild Job

RCA MI-4889 before and after video with bench test

I've redesigned some parts a bit, re-cut my plinth, and have lowered the motor a lot. Here's what things are looking like now.

In July I started development of a BLDC platter motor. I went through 5 distinct designs until I reached what is a very stable, very strong, and very accurate BLDC platter motor for lathes. The video below details the 3 month journey. Details: - Mag Lift Bearing with zero metal on metal contact at t...

And, if anyone needs anything on this side of the Atlantic.... I can engineer a solution to any problem. Happy to contract for any lathe related requirement.

Ok... Last post here that isn't related to my Advanced Mono Cutterhead. But, I wanted to share, and I don't have time to edit a lengthy build video about my motor right now. So, I'm posting this here. The next post should be a new thread that is specific to the motor. I've now refined the design for...

Shoot! I apologize for misreading. Written word is sometimes not as clear as real communication. Sorry. When doing this sort of R&D work in a space that I have zero experience in, I can tweak individual parts 10 to 30 times. I also regroup and do total redesigns at least 1 or 2. To do the CAD to CAM...

Hello, I'm Todd. Nice to meet you. I started reading the board in 2008. I've been a member of the Trolls since 2009. For some time I was very actively posting. Collectively my threads have somewhere in the area of 60K to 70K views. I've done a lot of interesting things and am about to start distribu...

Scooty Turn Jr with Custom Speed Control I've added the Arduino and tweaked my code for this motor. The results speak for themselves. Real-time speed sensing and adjustment. This is really nice now and will only get better. This is nearly ready to cut records on!!! I'm going to start the CAD work t...

Arduino is connected. Everything seems to be a go here. Gonna program the board and start testing!

Bipolar hall sensor array with pull-up circuit built, wired, and tested. PWM to DC Voltage circuit built, and tested. Next I program an Arduino and get wires connected. Then I can finally test my custom closed loop speed control. If all goes well, I'll have a more powerful and potentially more accur...

Scooty Turn Jr. - Nearly Finished!! A sneak peak at what's cooking. I'll be working without stop until I get my custom speed control integrated. But, just wow!!!! So much work is now paying off!! Refined hall sensor configuration, increased torque, can start from dead stop, maintains speed tightly,...

Yeah, I can put this into a standard turntable footprint.

Scooty Turn Jr. With Hall Sensors

Overhead Motor Mount V3 with two motors: Pitch and Fast. And, now with a larger pulley reduction. And, the groove inspection scope mounted to a swiveling arm. Tomorrow I test and troubleshoot the suspension controller circuit. If all checks out, that will be the last functional section to sort out. ...

Scooty Turn Jr. - BLDC Platter Motor The first test of V5 of my BLDC Platter Motor. Looking great! Need to adjust the off the shelf sensorless motor controller to get better performance at slow speeds. The controller I'm using is for making drones and wants to turn fast not slow. I'll now make my o...

Microscope has been sliced. Now, to make a joining piece and a swing arm and mount it on the lathe. That will form a very nice groove inspection scope. Also, designed and machined an interface panel. Tons of buttons!!!!! :-) So, to review, you can control the lathe from individual function buttons, ...

After a lot of struggle, learning, and honest work I now have MIDI Input working on PLS19. Never implemented MIDI on a raspberry pi before, so that took some unfamiliar config and code. This is a screenshot of the Windows MIDI Control app. All the buttons you see are currently functional. Now, its t...

A little preview of PLS19 major functions in action! More in depth video to follow.

Yeah we can put my S66 on there.