Delta 46-715 Lathe Repower #5: Delta 46-715 Lathe Repower #5: Finishing Rough Wiring and Doing Test Cut

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Blog entry by Pete_LJ posted 02-07-2017 02:14 PM 4837 reads 0 times favorited 3 comments Add to Favorites Watch
« Part 4: Delta 46-715 Lathe Repower #4: Getting Pullies running True and Accurate Part 5 of Delta 46-715 Lathe Repower series Part 6: Delta 46-715 Lathe Repower #6: Tachometer Hack from $3 Bicycle Computer »


I finished the rough wiring this morning. I still need to mount the potentiometer (which controls speeds), mount wires to motor more securely, put faceplate on switch/receptacle, and get wiring for light better secured . I ordered from ebay a plastic enclosure for the MC-40 motor controller (namely, the grey box in the pictures). The output from the MC-40 controller runs to the drum switch (the green switch in the pics) which controls direction of rotation. IN turn the wires from the drum switch lead to the treadmill motor. Started it up and it runs great. I did a test cut with a small gouge and parting tool. Clearly, I need to get a grinder set up to sharpen my chisels. This is my first wood lathe and I am pretty happy at this point. I look forward to getting the chisels sharpened and turning a small bowl.

I am working on using a little $3 bicycle computer to read rpm on the lathe. The cadence (bike speak for rpm at the pedal crank) on the unit has a maximum of 199. As a result, I am attempting to program the computer so that one hundred rpm will read out as 1 mph and two hundred rpm as 2 mph. If I get this to work I will then post an additional update.


I used the lathe to build a 12” sanding disc this past weekend. Sanding disc works nicely. I now need to build a table for the sanding disc that hooks into the hole for the tool post. Additionally, I found out that the drum switch defeats the slow start safety feature after the first start. IOW, if you stop lathe by shifting drum switch into neutral then when you return to working on the lathe by shifting the drum switch to the right (CCW) then the motor starts right back up without any slow start feature. I know this issue is a frequent complaint of treadmill motor conversions.

I am still working on the $3 bike speedo for a tach. And, I am also looking at wiring an electric brake for the lathe. My concept is to wire a momentary push button that will alter the circuit so that the treadmill motor is now acting as a generator. Thereby, sending the produced electric to a carbon pile or light bulb in order to brake the motor.

Tags: treadmill, tread mill motor, tread-mill motor, permanent magnet, mc40, mc-40, mc 40, mc-60, mc60, mc 60

3 comments so far

View Sawdustonmyshoulder's profile


489 posts in 5090 days

#1 posted 02-07-2017 02:50 PM

looking good!!!

I bought one of these tachometers and marked the graduations on my pot. Just a suggestion. I also used it to mark the RPM’s on my drill press that has a Reeves drive in it. $14 and change is all it cost.

-- The more skilled you are at something, the worse you are at it when someone is watching.

View Woodknack's profile


13594 posts in 3842 days

#2 posted 03-08-2017 07:10 PM

View Pete_LJ's profile


115 posts in 2207 days

#3 posted 03-25-2017 02:20 AM

Here are some pics of my sanding disc and the oak block which I tapped for 1”-8 threads.

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