RE: [CAD_CAM_EDM_DRO] calculation of motor torque

Hi Boris

Need to know how fast you need to get to 30 cm/sec.
That is acceleration, and basically determines how
tight a corner you can turn.

accel= velocity squared/turning radius.
(actually a vector sum of two axes in 2d)

Also need to know how long the leadscrew is since it's
effective inertia is often as much or more than a light
axis mass.

Also need some idea of friction... is it ballscrews and ways
or sliding type?

Les

Leslie M.Watts
L M Watts Furniture
Tiger Georgia USA
(706) 212-0242
http://www.lmwatts.com
Engineering page:
http://www.lmwatts.com/shop.html
CNC surplus for sale:
http://www.lmwatts.com/forsale.html
CNC carved signs:
http://www.lmwatts.com/signwp.html




-----Original Message-----
From: Boris Maraž [mailto:boris.maraz@...]
Sent: Sunday, December 14, 2003 4:37 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] calculation of motor torque


Hello!

Somebody have formula to calculate approximately how much torque must have
stepper motor to drive the router with 10mm/turn (or 20mm/turn) lead screw
and to get speed around 30cm/second and the weight of moving arch over table
will be around 15kg. Is it possible to do this with steppers or I must use
servo motors.

Thanks for your answers!

Boris


[Non-text portions of this message have been removed]


Addresses:
FAQ: http://www.ktmarketing.com/faq.html
FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com

Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
Moderator: pentam@... indigo_red@... [Moderators]
URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO

OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
List Mom
List Owner



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/