P-P Questions, and Answers?

[keakap]

Your assessment of the issue is exactly what I have found. I tried three different 20 amp wall mounted GFCI outlets and had no luck what-so-ever! There was one that gave me a little more time before breaking, but the others blew immediately! The GFCI breaker in the circuit box works fine. In fact I have two of these and both circuits work with the PowerPro. I was saving $ when I opted for the duplex outlet rather than another breaker. AHA! So I've found someone as chea-- uh, that is, frugal as me.Shucks! Worked for years until tried with the PP.

Glad you also like your new headstock, and interested to find it also has some low speed chattering. It is truly a very nice machine. My chattering is worse when using the bandsaw. I haven't tried the bandsaw yet. I expect it will be okay like yours (with possible improvement in the offing)Any other noises and/or vibrations seem normal.I tend to agree with that. It is too easy to imagine problems in that sphere. I mean a pin dropping is only an alarming sound when the room is quiet enough that you can hear it! [Which brings up a caution: when doing something at low speeds, don't forget to turn it off when done!]

Here's hoping all the new P-Ps are making SS owners very very happy!

[keakap]

... Anyway, those chatters that had been noted with sanding disks or bandsaws are real: I suspect on top of a nominal shaft speed of 900-1500rpm, you had about a 5-10 Hertz oscillation which whacks everything in a very audible manner. Those of us who complained could have heard the same thing with ear-plugs and ear-muffs at the same time. Not trivial!

Interesting.
When I first experienced the chatter I noticed that with a sanding disc mounted, running at a nominal 500 rpm, the speed was fluctuating (no load) from ~420 thru ~580. That's a LOT.

I haven't noticed the fluctuations lately, as the noise has abated considerably after "breaking in" the belts (for lack of better terminology).

For me the trepidations arising from the chattering focused on possible damage done while running in chatter mode. Functional difficulties are not yet a concern.

[keakap]

But isn't that what the control loop is there are]Question[/B]: When this happens does the operator have the ability to slightly alter the operating speed, attempting to find that perfect speed where the chatter quits????

Excellent questions, imho, and equally perspicacious commentary.
One wonders what horrors beta testing DID find, if this is the left-over.

As to the last: yes, the operator does have the ability (thus far a seemingly endless source of fascination and amusement) to slightly alter the operating speed. Unlike an old fashioned harmonic rattle in the dashboard, a slight variance in motor rpms doesn't really cure the chatter, but rather sorta 'changes' it.
Custom speed changes are made with increase and decrease buttons, either one revolution at a time (one poke) or a 'poke-n-hold' ramp up or down. One can go from 9500 to 253 in a matter of seconds, all perfectly controlled.

[keakap]

I be curious WHAT specifically is creating the 'racket'? The quill shaft? The idler shaft? The motor? Methinks maybe that varies depending upon what is being driven.?

Interesting question. And I have no idea.
But it was most noticeable at the first laying-on of hands that spindle drive is much 'tighter'. With the old, I would grab the spindle to rotate it "flat" side up, and think "wholly carp! where's that wrench" only to realize it was normal spindle slop I was feeling. (Sorta like the steering in my '55 Cevy-- turn the steering wheel and after a while the car would turn.)
This guy has none of that. So whence the chatter? Might not even be mechanical.

[JPG]

Interesting question. And I have no idea.
But it was most noticeable at the first laying-on of hands that spindle drive is much 'tighter'. With the old, I would grab the spindle to rotate it "flat" side up, and think "wholly carp! where's that wrench" only to realize it was normal spindle slop I was feeling. (Sorta like the steering in my '55 Cevy-- turn the steering wheel and after a while the car would turn.)
This guy has none of that. So whence the chatter? Might not even be mechanical.

I do hope the internal magnets are well secured!!!!!!!!!!!!!!!!!!!!!!:eek:

[JPG]

. . .

Yes, I feel for Wes! Talked with him last Thursday about these issues while standing at the machine and running it. He said he had to do some math to figure this out and he had to get hold of another PP to use while he is on the phone. He called back the next day and said this would take a while - he is working on the problem. Wes took this week off.



. . .

Wonder if he is in New Zealand this week(off)?;)

[dusty]

I have participated, as a team member, in the release of many engineering projects into production. What I have experienced is that no matter how much testing is done by the design crew, there is always some additional problems found by production and the subsequent customer.

One of the best assignments I had was to babysit the project as the production line came up to speed. I was specifically instructed to do "nothing", just be available - unless the line stopped. I had a ball wandering around the facility, visiting with engineers and production managers in areas where my project was not.

Bottom Line: Small problems are to be expected.

[keakap]

the vibrations (we call it chattering) have been so severe as to loosen the drive hub on the aux. spindle.

I remember some conversations regarding the goofy washer on some arbors, and how it helps keep the arbor tight even with start-up and stop "surges" (a terrible description, but close enuf for now).
And now we're talking start-up and stop "surges" a few thousand a minute, and some quite forcible.
No wonder that hub came loose!

(I have had one arbor screw come loose. First time ever. Now I double check my double checks.)

[keakap]

...
Bottom Line: Small problems are to be expected.

Absolutely!
And what would we do without them? Someone mentioned that the PP is being listened to verrrry closely. Naturally.

I'd go nuts with a perfect machine.

(Gee, sure is quiet in here. Hm, maybe it's too quiet. Shouldn't there be some noise over here...)

[charlese]

Just to correct my mis speak. Actually Wes took last week off and is back to work today - October 4, 2010.