Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: burgs on April 23, 2006, 02:17:31 AM

Title: Determining Servo Motor sizes
Post by: burgs on April 23, 2006, 02:17:31 AM

Hi
Anyone out there know of any easy way of determining servo motor size reguired for a machine with out doing the maths.
I have been looking at similar new machines to mine and checking what servos they have. But if they don,t give the lead on the ball screws
Bets Regards
Burgs

Title: Re: Determining Servo Motor sizes
Post by: Brian Barker on April 23, 2006, 09:10:44 AM

What do you have for a machine?

Title: Re: Determining Servo Motor sizes
Post by: burgs on April 23, 2006, 05:33:36 PM

Hi
Webster & Bennet verticle lathe.
36" chuck
 2 axis X, Z
25 hp  max motor speed 1420rev/min
max spindle speed 125rev/min
I intend fitting speed control to the motor.
I thought someone may have done a simple spread sheet for servos.
Also does Mach 3 have G96 for motor speed control (constant surface speed)??
Best Regards
Burgs

Title: Re: Determining Servo Motor sizes
Post by: Brian Barker on April 23, 2006, 06:33:20 PM

I think you are going to have to look at the motors that I have just put on. http://web1.automationdirect.com/adc/Shopping/Catalog/Motion_Control/Servo_Systems/Medium_Inertia_(1KW_-_3KW)_Servo_Systems/1KW_Servo_System_(Med_Inertia)

Title: Re: Determining Servo Motor sizes
Post by: burgs on April 24, 2006, 05:03:56 AM

Thanks Brian
Another step forward.
Between the web site you gave and the servos on our Mazak I should be able to work it out. I have down loaded the specs on 1 to 3kW drives and motors which by the toque graphs should be in the range I am looking for. The prices look ok as well. Transport costs may be high though to Aus.
Best Regards
Burgs
PS what did you use the drives on and how are they working?
Just found these guys are in Qld. Australia.

Title: Re: Determining Servo Motor sizes
Post by: Brian Barker on April 24, 2006, 06:52:37 AM

You can see the mill running here: http://machsupport.com/forum/index.php?topic=502.0  It is a BP type machine and the servo's are much to big for the job :)