What is the footprint (for planning purposes)

[dusty]

I think one needs to figure out what "start up" is on the powerpro. When you flip the switch it "powers up" but is not running. The next step is to have it turning but that can only happen after it "boots" up. You get the idea right?

Since we have no idea of speed or load conditions one could be starting at 250 rpm with nothing attached, I'd guess this would be the minimum current condition and even then how are we measuring "peak" current?????

All this is pretty meaning less when you think about it. You do not plan your shops electrical using the minimum current draw of the shopsmith.

I have a watt meter that cost me less then $20, I would never expect it to give me a true peak current but some warmer day I will plug it in and see what it does show me. If someone else wants to beat me to it be my guest.


Ed

I would beat you to it, Ed, but my 520 readings (which are on uTube) shows me nothing about a PowerPro.

Besides, I think it is clear that this 2amp comment was part of a sales pitch (being it is only partially true).

Who was the demonstrator - anyone know?

[wa2crk]

I don't know if the video is still available, but on the Tekna Tool website there was a comparison of the power used by a conventional lathe and a DVR powered lathe. After two identical bowls were turned the power consuption (expressed in watts) was half for the DVR system.
Bill V

[dusty]

I don't know if the video is still available, but on the Tekna Tool website there was a comparison of the power used by a conventional lathe and a DVR powered lathe. After two identical bowls were turned the power consuption (expressed in watts) was half for the DVR system.
Bill V

That is not at all hard to believe. That is one of the selling factors for that new technology.

[JPG]

That is not at all hard to believe. That is one of the selling factors for that new technology.

Do keep in mind the PP ramps up slowly(very slowly IMHO) when 'rotation' is 'initiated'.

Question is, for how long does it stay below 2A. My guess would be not very.

Sales pitch 'peak' info with little 'meat'.

Peak has a different meaning than can be specified as watts. Typically peak is misused sales jargon. Steady state or maximum sustained power has real meaning.

FWIW 120 peak watts is actually 60 watts rms.

[fjimp]

Dusty are you suggesting that car salesmen make good woodworkers or electrical engineers??? Jim

Sorry I couldn't resist.

[dusty]

Dusty are you suggesting that car salesmen make good woodworkers or electrical engineers???
Sorry I couldn't resist.

Jim, I just don't know. But I do know some good and honest woodworkers that certainly would not make good car salesmen.

As for electrical engineers, well ..... someone else better evaluate this. I worked as an engineering technician for too many engineers and for too long. My judgement is likely impaired.

[JPG]

Jim, I just don't know. But I do know some good and honest woodworkers that certainly would not make good car salesmen.

As for electrical engineers, well ..... someone else better evaluate this. I worked as an engineering technician for too many engineers and for too long. My judgement is likely impaired.

I doubt that.

I do know of what you are implying.



I have been on both sides of the fence.






I never forgot from whence I came.





I feel fortunate to have 'come' through that way.

I always went out of my way to explain 'why'.

Tech's are an invaluable resource for the 'prima-donna's' even though they do not have enough common sense to realize that.

[robinson46176]

I was always told that "peak" HP was the HP achieved under load on the test bench just as the motor was bursting into flames...


.

[skou]

[quote="JPG40504"]I doubt that.

I do know of what you are implying.



I have been on both sides of the fence.






I never forgot from whence I came.





I feel fortunate to have 'come' through that way.

I always went out of my way to explain 'why'.

Tech's are an invaluable resource for the 'prima-donna's' even though they do not have enough common sense to realize that.]

Sorry, but this is a bit off subject, but just barely.

When I lived in Oklahoma, in the Army, a friend and I got a couple of old pinball machines, and had to restore the electrics on them There was nothing electronic, it was all relays and transformers.

Cut to 5 years later, when I was working at McDonnell-Douglas, on the new MD-11. The cargo loading system was (again) run off of relays, and the Electrical Engineers had NO IDEA how to fix them, since most of their training was in semiconductors. I had to explain the process to them, after reading the schematics.

Sometime, EEs are smarter than they think they are. (But, most of the time...)

steve

[redleg]

I believe the point he was making was that there is no power surge when it starts. This is quite different from typical induction motors which pull a significant current surge at startup causing dimming lights etc.. I believe the chart info is the currant drawn at 'rated' mechanical power output.

Didn't mean to stir the pot and go away but lack of a power surge when it starts was my point exactly. The salesperson (anonymous) specifically said 2 amps and not when turning the computer on but at motor startup. He did follow up with a further comment about increasing speed and load required additional amps. I can not run my 510 or 520 and a DC3300 on a 15 amp circuit with consistent results but I can a Power Pro and DC3300. My point being that the original poster might not need to change his 15 amp circuit to run a Mark 7 Power Pro. Stand alone SPTs like coffee pot and toaster may want to be on another circuit if used at the same time. Can not remember the exact startup amperage of the Mark V but someone can remind me.


Think about the ads on Craigslist for a Shopsmith when the guy says he only used it once. Sometimes its the truth the machine had five other owners in its lifetime but he only used it once when he broke it. Like this forum there is a lot of fantastic advice here and some that even I have had to shake my head at.

I bought a Shopsmith for a hobby the car I had to have or walk.