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Re: OT: Bainbridge 712 resurrection
¿ªÔÆÌåÓýAs I¡¯ve written before (but maybe not here?), all Single Phase Capacitor Start AC motors are reversible.? Those that appear not to be just don¡¯t have the necessary wires run out and require partial disassembly to reverse.? ? Generally, if a manufacturer is making a bunch of units that DON¡¯T require reversing the motor and are buying the motors from a manufacturer instead of a distributor, they¡¯ll buy a motor that turns in the correct direction and can¡¯t easily be changed because it is a little bit cheaper.? If a wholesaler or retailer is buying motors to stock for resale as motors, they¡¯ll buy ones that can be reversed by just interchanging or swapping wires.? This costs a few cents more but cuts their required stockage in half.? So if you find something like a band saw with a ¡°reversible¡± motor, it was probably either a low volume production or a replacement motor. ? Robert Downs ? From: 4x6bandsaw@... [mailto:4x6bandsaw@...]
Sent: Wednesday, January 2, 2019 07:50 To: 4x6bandsaw@...; 4x6bandsaw@... Subject: Re: [4x6bandsaw] Re: OT: Bainbridge 712 resurrection ? Well....again, I don¡¯t know why they would have used a reversible motor on a band saw. Maybe they cost less, or maybe they used the same motor on different machines, and set the rotation to suit the app. No matter since it¡¯s going the right direction now. ? He he..... yeah....flip the hot & neutral! That¡¯s like flipping the fan on your car engine to make it blow the other direction! :) ? ? From: 4x6bandsaw@... on behalf of Darren McCarley darren.mccarley@... [4x6bandsaw] <4x6bandsaw@...> ? ? Bill, We're both assuming the motor is original. The reversing is in the motor itself. I have to switch 2 wires after the hot and neutral connections. Weird stuff, for sure. Or..... could I have installed a gear backwards...... not possible... the worm gear has a pin hole on only 1 end and the drive gear wouldn't allow the gear box cover to close. Plus, I think the drive gear is nearly straight cut..... Maybe I reversed the hot and neutral wires..... (Little AC humor there...). Darren Get On Jan 1, 2019, at 2:30 PM, "Bill Armstrong bill_1955@... [4x6bandsaw]" <4x6bandsaw@...> wrote: ? I have never seen a band saw that has a reversible motor. All I have been around, the blade travels toward the fixed jaw of the vise. This makes sense if you think about it. ? ? From: 4x6bandsaw@... on behalf of darren.mccarley@... [4x6bandsaw] <4x6bandsaw@...> ? ? Well, good news, for me anyway. :) I ran across this 1976 ad on Vintage Machinery.??The ad states the saw can be used in vertical mode! This tells me that the someone in the past either installed a different motor and didn't realize it could be reversed, or had blade tacking issues and their "fix" was to reverse the motor to "push" the blade rather than "pull" it. (To me, the saw was designed to have the blade "pulled" towards the lower drive wheel, rather than be "pushed" by it.) At least with this inferred confirmation, I can move forward with a bit of confidence that I'm at least driving towards the original design of the saw, rather than fighting the design.? ? More tweaking. :) Time to really use the ol'noodle and figure out what else is missing/wrong with this thing once I have the motor turning in the correct direction, causing the blade to run off track. Blade twist, wheel angle, heck, it may even be the blade.? The cool thing? Once I figure this out, the first "pulling" cuts will be used to fab a table for use in horizontal position. Thanks for listening to be babble on, again. :) Darren |