sizing a AC (drive) motor for a system that requires 3 separate outputs

[Michael M Wilko]

Hi, I was hoping someone could help me calculate the size of a drive to run the following,

1. a pinch roller pulling a wire total force 50n, roller radius is 28.559, 100 rpm

2. a lobe (cam roller bearing) swung off a shaft pushing a piston arrangement down, needing 100kg of force perpendicular to the shaft, shaft being 80mm diameter - with the lobe protruding 2.5 mm (42.5mm radius), the piston has a roller contact the lobe. the shaft is turning at 1200 rpm.

3. a cam spinning at 1200 rpm - throwing a pendulum anti & clockwise 2.5 degrees, ark length only 7.5mm - so 1200 is really 600 cycle clockwise and 600 cycles anticlockwise. the pendulums mass is about 8kgs, with a 120mm moment arm, some weight is around the bearing housing and some situate around the cam mouth which is on the same swing radius of approx 100 mm. the cam is set into a birds mouth arrangement.

I calculated that I would require 4 to 5 kilowatts approximately. i would use double sided timing belts to drive all axis from one motor with a servo drive

your help would stop many sleepless hours. if you can make sense of my question.

many thank s Michael

 

[jlnsol]

Hi Mike,
Your project requires skills and time. Lack of time and no reply were the cause to quit. I see that mail wasn't functioning... How much time do you have to solve this drive determination?

 

[Michael M Wilko]

Hi J,

The project has come from the need to simplify a process, if this prototype works then we have accomplished a great feat. I have the time I am able to draw and source information, though I lack the skills which you have to add the correct and much needed engineering.

As for the no reply, - as far as the notification of your post - nothing came thru to my email account re your last post - I took it that you were to busy and I really didn't want to push the subject onto someone helping out. I didn't check the site as I was fully reliant on the post coming to me via email, this will not happen again, learnt that lesson.

This project is important to me, I have no else help at this point, I was so very happy for you to show so much interest and so very disappointed to see you lose faith in me.

Very best regards

Mike

 

[jlnsol]

Hi Mike,

I am busy too, but I will continue to help you out! Hopefully post new stuff tomorrow!
Regards,
J

 

[Michael M Wilko]

Hi J,

I appreciate your help, please do not put this before anything important. Time will see this work out.

again thanks

Mike

 

[Michael M Wilko]

Hi J,

I have been reading and studying what you have done to date, it is hard for me to understand the engineering, whilst I have a natural feel with building - I do wish I had your skills, so far it is all looking really good.

I was at the stage of just throwing a 7 or 8 kilowatt 8 pole motor and VSD a few timing belts and pulleys and keeping my fingers crossed.

again thanks

Mike

BTW - what country are you in - I am in Australia - Sydney Australia

 

[jlnsol]

Hi Mike,

Good to hear that you studied what I wrote.

 

[jlnsol]

Hi Mike,

Finally I arrive at a 4,9 kW 1200 rpm motor. It appears that the cutting force 100 kgf of the rocker driven by the lobe shaft is by far the main power consumer. I added a 1,5 operation factor (for losses by friction etcetera).
See attached zip file.

Regs
J