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Location: Jonesborough, TN
Looking good, Brian!
Chuck
Micromark 7x14 Lathe, X2 Mill , old Green 4x6 bandsaw
The difficult takes me a while, the impossible takes a little longer.
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Location: Kamloops, BC, Canada
The following 1 user Likes Shawn's post:
EdK (12-10-2013)
I love the placement of the motor, I did a similar modification to my SB 9" and use it all the time. I could use the gears on the lathe itself but this is so much quieter and I'm not stuck with whatever gearing I had installed last time I cut a thread. I don't have a QCGB so setting the feed rate is a bit more involved than a couple levers. Having a variable feed rate would be even nicer. I used step pulleys but found I was using only one step 95% of the time so it has never left that postion in the past year. The feed rate leaves a nice finish and I'm never in a rush so I'm not really concerned about anything else.
I'm using what I had on hand so it's a 1/2 HP motor driving a 25:1 speed reduction drive to a pulley on the leadscrew. I bought a another leadscrew bearing for my lathe on Ebay because I couldn't bring myself to cut into the existing one. If I ever decide to remove the drive (doubtful) I can simply install the original bearing back on.
Shawn
Shawn, proud to be a member of MetalworkingFun Forum since Nov 2013.
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Location: Nova Scotia, Canada
Nice solution Shawn, good job!
Any thoughts of changing to some kind of variable speed motor?
Busy Bee 12-36 lathe, Busy Bee Mill drill, Busy Bee 4x6 bandsaw, Homemade 9x17 bandsaw, Ad infinitum.
Posts: 313
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Joined: Nov 2013
Location: Kamloops, BC, Canada
A variable speed motor would definitely be the way to go, I think Brian has got it right for sure. I was testing it out when I put this together. The only reason the motor is painted is because I switched it off the lathe for a 3/4hp that ran much smoother. It has worked so well I haven't bothered to change anything.
Shawn
Shawn, proud to be a member of MetalworkingFun Forum since Nov 2013.
Posts: 437
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Joined: Sep 2012
Location: Sicily
That looks a mighty powerful system Shawn. I cant stop this wiper motor by hanging on to the saddle hand wheel. so yours must be great.
I wonder if it is possible to broach keyways or splines by indexing the chuck ???.
After getting the meter from the boat, I tested the draw it's 5A similar to
the motor's used on the mill table. so I will order a PWM control unit ans tap into the mill power supply.
I cant use the other end of the lead screw because I have a wheel to fine feed the saddle if I require it. one div = .001".
Brian.