ruffdog
Super Star Member
- Joined
- Dec 31, 2011
- Messages
- 10,626
- Location
- southern wisconsin
- Tractor
- Bobcat Toolcat 5610G, Deere X744, Cub Cadet IH 982
This is an old one made by Warner Instrument Co in Beloit WI
This is an old one made by Warner Instrument Co in Beloit WI
Ahah! OK, thanks for that. Sounds like all this theory is overthink. If I had not found out about it, I would have just experimented until it sounded and felt right. Back in my younger days that's what I used to do.It's very common for these smaller Japanese tractors to have 4 PTO speeds. Something like 540 - 750 - 860 - 1000. All achieved at the rated RPM, probably in the 2500 engine RPM range like Ruffdog says.
It's also common to use the 750 RPM with less engine RPM to achieve 540 PTO RPM with less engine RPM, also known as 540E (E for economy).
And even more so, reduce torque for the implement. But that's where you drop the _tractor_ gear and just move slower.It should be noted that running a higher pto gear at a lower engine speed will greatly reduce available HP.
Thanks for that idea. It is good. There are actually a couple of sites ... Online Tone Generator - Free, Simple and Easy to Use....for instance. Does all the standard wave forms.A 6 spline shaft at 540 rpm would generate 3240 square wave beats per second if it made contact with a flexible strip. Remember clamping playing cards to your bike wheels ?
Then ask Google to play you a 3240 Hz. tone on your phone and compare the 2 tones. Adjust the throttle accordingly in any of the transmission selectors. The tone is actually played on a youtube clip loaded with your specified frequency. Try it ! Even though the generated tone is a sine wave, you can't miss the hook up (well yas you can if you're DEAF, but that would kill the mood). As you get close to a match, you might hear a beat frequency as the difference between the two signals. Ignore any sharks that might appear in the area....
Incandescent lighting doesn't really flash, because the filament itself is incandescent, and it doesn't markedly change temperature/light output during the brief interruption of power.Thinking outside the box, would this works using a standard 60hz incandescent light?
Find where 600 PTO rpm is (because it works well with 60 sec/min and 60 cycles/sec.) as follows:
The PTO shaft turning 600 rpm, means 10rev/sec. The PTO shaft has 6 splines. At 10 revs per sec, that means 60 splines pass by per second.
An incandescent light operating at 120v/ 60 hertz flashes 60 times per second. That means, the splines will look like there not moving when PTO is at exactly 600rpm. (“Strobe effect”.)
Once you know engine rpm for 600 PTO rpm, multiple that by .9 for 540 PTO rpm engine setting.
The problem, you might also observe “stand still” strobe effects at 15, 30, 60, 120, splines/sec, (150, 300, 600, 1200 rpms, maybe others?), so you have to know you’re operating in the right ballpark when looking for the 600 rpm strobe effect.
Suuuuuure, that’ll work…..in theory!![]()
Why not????Well I certainly do not want to run my engine at 2500! Anyway does that have anything to do with a 4-speed PTO, or refer to my question?