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Proxxon 50ef question (link to video)

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dlh
  • Member since
    March, 2017
  • From: Chambersburg, PA
Proxxon 50ef question (link to video)
Posted by dlh on Tuesday, September 04, 2018 4:58 PM

 

Video here:

https://public.fotki.com/dhoover/proxxon/20180904-192943.html

 Just got it new.  It seems to pulse or vibrate at low speed.  One Amazon reviewer said that it's due to the way the motor is manufactured (?)  It uses a pulsing DC power supply; is that the reason?

It's really tolerable, just noticeable.  It doesn't seem to affect the smoothness of the bit rotation, just seems to twist in your hand a little.  If I lay it down, I can see "torquey" little jerks.  Is this normal?  I might send it back if I can find more info.

Thanks

Dave

 

 

  • Member since
    July, 2013
Posted by modelmaker66 on Wednesday, September 05, 2018 12:12 AM

I dont know the item but in my experience if a motor feels wrong or out of balance then there is a problem.

  • Member since
    December, 2002
  • From: Bury St Edmunds, Suffolk, England
Posted by Bish on Wednesday, September 05, 2018 2:02 AM

Can't recall if i have the 50/e or EF but i have not noticed any issues like that. Only problem i have found is that even at the slowest speed it still runs fast and melts the plastic when drilling. Glogs up the drill bits and tricky when drilling small holes.

'I am a Norfolk man, and i glory in being so'

dlh
  • Member since
    March, 2017
  • From: Chambersburg, PA
Posted by dlh on Wednesday, September 05, 2018 9:56 AM

modelmaker66

I dont know the item but in my experience if a motor feels wrong or out of balance then there is a problem.

 

Thanks for the opinion.  I've ordered a replacement.

Dave

  • Member since
    June, 2014
  • From: New Braunfels , Texas
Posted by Tanker - Builder on Saturday, September 08, 2018 9:28 AM

Oh Oh!

   It souldn't be doing that ! I have a Harbor Freight unit that winds down to 1000 R.P.M. It's still a little fast for plastic , but plugged into an old Portable Sewing Machine foot control I get it down to unimaginable slow speeds .

 My control is probably at least forty years old . See , if you take care of your tools they take care of you . That Proxxon now convinces me I made the right choice . Besides Harbor freight is right down the road. 

  I don't like to spend more than I have to for a tool . Now , I once spent a ridiculous amount for the " Best " scroll saw I could get . All the bells and whistles .Turns out the clearances were not right for what I was doing . The neck depth at 18" still didn't clear when I was cutting out intricate patterns in wood .

 I bought an old " semi - industrial " Sears model at a yard sale . Geez , it took two of us to put it in and get it out of the car . This thing has a throat depth of 30" ! Price .20.00 bucks ! The other one 250.00 Bucks .

 You may have other Proxxon tools , that I don't know .They are promoted by sight . profile and shape on craft shows and sometimes you'll see their nameplate . That does not make them the " Best " 

 My definition  of the  "Best " is how long with good care , a tool does what I buy it for , and it continues to operate correctly , No matter how old or new it is .

dlh
  • Member since
    March, 2017
  • From: Chambersburg, PA
Posted by dlh on Saturday, September 08, 2018 10:13 AM

dlh

 

Video here:

https://public.fotki.com/dhoover/proxxon/20180904-192943.html

 Just got it new.  It seems to pulse or vibrate at low speed.  One Amazon reviewer said that it's due to the way the motor is manufactured (?)  It uses a pulsing DC power supply; is that the reason?

It's really tolerable, just noticeable.  It doesn't seem to affect the smoothness of the bit rotation, just seems to twist in your hand a little.  If I lay it down, I can see "torquey" little jerks.  Is this normal?  I might send it back if I can find more info.

Thanks

Dave

 

 

 

Yup, the replacement does exactly the same thing.  Must be the nature of the beast.  I'm keeping it anyway; can never have too many toys.

  • Member since
    January, 2005
  • From: Cave City, KY
Posted by Watchmann on Saturday, September 08, 2018 11:08 AM

Yes, the speed of DC motors are controlled by pulsing them on and off.  The slower you run the motor, the longer the pause between pulses of electricity.  DC motor will be damaged if controled by a potentiometer.

dlh
  • Member since
    March, 2017
  • From: Chambersburg, PA
Posted by dlh on Saturday, September 08, 2018 12:29 PM

Watchmann

Yes, the speed of DC motors are controlled by pulsing them on and off.  The slower you run the motor, the longer the pause between pulses of electricity.  DC motor will be damaged if controled by a potentiometer.

 

Thanks, sort of what I thought; much like the brushless RC car motor I have.

Propeller

  • Member since
    June, 2014
  • From: New Braunfels , Texas
Posted by Tanker - Builder on Saturday, September 15, 2018 2:23 PM

Yeah ;

 New isn't always better . But if they sell you something else to make it even better then they Gotchya ! I like things simple and straightforward . Plug in , Turn on and Use .

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