Bandsaw and the PowerPro

billmayo · Post by **billmayo** » Thu May 03, 2012 12:36 am

[quote="ppengineeratss"]Greetings all]

Since a lot of us Shopsmith owners are engineers or with backgrounds in electronics and software, Is there any plans to offer a programming course for what each control circuit controls along with min & min limits and why staying inside each set of limits is recommended. I would be happy to pay for and be happy to attend such a class at the factory ever If I do not own a PowerPro. A source of money/income for the factory. Maybe a one day class with several other classes on later days for equipment maintanences.

No one wants to damage an expensive piece of machinery so a little more knowledge can be helpful to all of us. I really enjoyed the Owner's Weekend.

ryanbp01 · Post by **ryanbp01** » Thu May 03, 2012 9:51 am

billmayo wrote:Since a lot of us Shopsmith owners are engineers or with backgrounds in electronics and software, Is there any plans to offer a programming course for what each control circuit controls along with min & min limits and why staying inside each set of limits is recommended. I would be happy to pay for and be happy to attend such a class at the factory ever If I do not own a PowerPro. A source of money/income for the factory. Maybe a one day class with several other classes on later days for equipment maintanences.

No one wants to damage an expensive piece of machinery so a little more knowledge can be helpful to all of us. I really enjoyed the Owner's Weekend.

Great idea!
BPR

nuhobby · Post by **nuhobby** » Thu May 03, 2012 10:43 am

billmayo wrote:Since a lot of us Shopsmith owners are engineers or with backgrounds in electronics and software, Is there any plans to offer a programming course for what each control circuit controls along with min & min limits and why staying inside each set of limits is recommended. I would be happy to pay for and be happy to attend such a class at the factory ever If I do not own a PowerPro. A source of money/income for the factory. Maybe a one day class with several other classes on later days for equipment maintanences.

No one wants to damage an expensive piece of machinery so a little more knowledge can be helpful to all of us. I really enjoyed the Owner's Weekend.

I like this idea]very[/B] math-intensive area. The ever-looming problem is Stability (self-oscillations, runaway, etc.). While the math used to be mainframe-worthy, these days a person could probably do it on a home PC -- if he knew how to model all the system and had the engineering s/w. At one time I found the Teknatool DVR schematics on the web, while I was waiting for my PowerPro. But I really don't want to go there -- woodworking is my getaway from engineering

.

JPG · Post by **JPG** » Thu May 03, 2012 9:12 pm

nuhobby wrote:I like this idea]very[/B] math-intensive area. The ever-looming problem is Stability (self-oscillations, runaway, etc.). While the math used to be mainframe-worthy, these days a person could probably do it on a home PC -- if he knew how to model all the system and had the engineering s/w. At one time I found the Teknatool DVR schematics on the web, while I was waiting for my PowerPro. But I really don't want to go there -- woodworking is my getaway from engineering .

Wishful 'thinking'!

It ain't gonna happen!

Too much risk, too little control.

That's the way I see it!;)

michaeltoc · Post by **michaeltoc** » Sun May 06, 2012 3:15 pm

[quote="ppengineeratss"]Greetings all]

When I initially called, mid 90's did not work, so I was told to set it to 100. At that time it appeared to work (and no overspeed), so we left it at that. some time later, I still experienced the banging, so I called again, but never received a call back (so much for customer service), so I gradually increased the IrOFFSET (not randomly) until the noise stopped - which is 130.

As for the overspeed - sorry to disagree, but the PP only overspeeds at low speeds. At 2000 RPM and above, there is no overspeed. There is no proportional change, rather, an inverse proportion. At 500 RPM, the overspeed is 1100; at 900 it is 1500; at 1350 it is 1850; 2000 and above there is no overspeed - which is why I do not consider the overspeed to be much of a problem. I will agree, however, that it can be a problem with the bandsaw. Yes, I recently have thrown a tire - and now I know that it is probably due to the overspeed.

You made a very strongly worded commentary on the dangers of changing the setting. OK, so I'll put the setting back to 82. What about the safety issues of loose set screws - (one of which was on the drive pulley on the PP motor. If it wasn't for the retaining ring, that pulley would have popped off), and I suppose a broken coupler caused by the banging is also safe? In over 25 years with my MKV, I've never broken a coupler, nor had a set screw come loose (until I installed the PP) - so don't tell me that the default setting is "safe".

wurlitzerwilly · Post by **wurlitzerwilly** » Sun May 06, 2012 3:53 pm

[quote="michaeltoc"]When I initially called, mid 90's did not work, so I was told to set it to 100. At that time it appeared to work (and no overspeed), so we left it at that. some time later, I still experienced the banging, so I called again, but never received a call back (so much for customer service), so I gradually increased the IrOFFSET (not randomly) until the noise stopped - which is 130.

As for the overspeed - sorry to disagree, but the PP only overspeeds at low speeds. At 2000 RPM and above, there is no overspeed. There is no proportional change, rather, an inverse proportion. At 500 RPM, the overspeed is 1100]
Some good points Mike. You were initially told to change the settings by Customer Service, so why the backpedaling by them now?

I also made a few valid points, but there has been no reply from Jim.

As you say, so much for customer service!