View Full Version : Rockwell/Delta 12/14 saw question
Marc Jeske
12-17-2017, 7:34 PM
Recently acquired the above w the factory original 1 ph 3hp motor.
Will be awhile till I get it going.. In meantime wondering what should I expect for blade wind down time when I hit the off button ?
I don't want to be expecting like 15 seconds and end up with a surprise like a minute.
Also, Much diff in time between 14 and 12 blades ? (both heavy full kerf)
Thank you , Marc
Bill Dufour
12-17-2017, 10:26 PM
If it is belt drive coast down should be fairly quick.
Bill D
David Kumm
12-17-2017, 11:08 PM
Mine has four belts so it spools down quickly enough that I've never needed a brake. The direct drive saws spin a long time. Dave
Marc Jeske
12-17-2017, 11:57 PM
Multiple belt drive as from factory.
Please address this specific saw, w the motor noted.
Or at least, w 3 ph motor.
Marc
Dave Cav
12-18-2017, 12:01 AM
A 14" blade will not retract all the way below the table, and might be too much blade for your 3 hp motor.
David Kumm
12-18-2017, 12:04 AM
The saw i was referring to is a Rockwell 12- basically the same saw with a 5 hp single phase motor. The phase won't affect the time to slow and I would guess a 3 hp motor will slow more quickly than a 5 hp. Dave
Marc Jeske
12-18-2017, 12:39 AM
Currently using a Powermatic Contractor saw, McMinville made, at least 35 yr old, w an aftermarket newer 2 hp 1 ph internal Klixon protected motor,plain cheap toggle switch.
Never looked into this, but it almost seems like I have like a dynamic mag brake, it seemingly by some self force stops in approx 4 seconds, which I love.
Does not say anything special on motor nameplate.
All bearings great, spins up to full speed in like seems 1/4 second.
So I'm just wondering what to expect when/ if I let this one go and move to the 12/14.
Marc
Marc Jeske
12-20-2017, 3:02 PM
Still asking if anyone has an idea of the wind down time I should expect ?
Marc
Doug McKay
12-20-2017, 6:06 PM
12" 3hp 3ph w/static converter to 1ph. 9 seconds.
Matt Day
12-20-2017, 6:35 PM
It’s not a grinder, it’s not going to take a minute to spin down. You’ll find out once you get it up and working.
Bill Dufour
12-20-2017, 9:25 PM
single phase will slow quicker.
Bill D
Chris Hachet
12-21-2017, 9:29 AM
If this is an issue, VFD and electronic braking. Seriously. That would be at least a 4 or 5 grand sw if you were buying it new, I assume you did not pay that much for it. VFD and a braking resistor and you are still in on the cheap.
Chris Hachet
12-21-2017, 9:30 AM
VFD on a 3 phase 3 HP Unisaw, maybe 12 seconds to wind down.
Bill Dufour
12-21-2017, 6:01 PM
Unless you are starting and stopping often you probably do not need a resistor with a vfd. I would try it without first. Easy enough to add something later if needed.
Marc Jeske
12-21-2017, 7:08 PM
Will generally be just serious hobbyist use, one -2 man home shop.
I'm sure I'll get used to the new saw,,, just thinking safety.
The faster the wind down the better.
Marc
Matt Day
12-21-2017, 7:16 PM
VFD on a 3 phase 3 HP Unisaw, maybe 12 seconds to wind down.
12 seconds? Count to 12 in your head, that’s a long time. Mine is 3-4.
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