×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Electrical consumption machine tool : axis

Electrical consumption machine tool : axis

Electrical consumption machine tool : axis

(OP)
Hi,

I would like to determine the electrical consumption of machine tool axis during a cycle. I thought that from a cycle like this
we could determine the energy consumption with the formula Pmeca=Torque x speed and Pelec=Pmeca/productivity. And as I have the different time of the task during the cycle, I multiplicate the electrical power by the time to determine the power consumption in kWh. But I'm not at all sure of my method. What do think about that ? Thanks.

RE: Electrical consumption machine tool : axis

Quote:

What do I think about that

Crazier than a pet coon.

Theoretically that would give an approximate relative result. In reality that fails to take into account so many things as to be not useless but utterly useless.

If you want this info you need to measure it empirically on the machine of interest, doing the work of interest, at the temperature of interest, with the (new) tool of interest, with the coolant flow of interest. Change anything and you will need to do it all over again.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Electrical consumption machine tool : axis

The main problem is your kW calculation.
What Keith says.
Use a Watt-Hour-Meter to find the actual consumption at each step.
From there resolve to Watt-seconds and sum and you're done.
I expect that the real world consumption may be from 150% to over 200% of your estimates.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Electrical consumption machine tool : axis

(OP)
Ahaha Keith few problems with the English language ^^. But ok I understand the role of different parameters ...

Yes Bill I do it. I multiplicate the electrical power (kW) by time(s)/3600 to have a kWh consumption.

Thank you both !

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close