Re: motor size?

Thanks Much! Would you please explain the formula you used?



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dan Mauch" <dmauch@...>
wrote:

>
> I would think that a 700 oz in stepper would be fine with your set

up. I used one on a similar 13X40 retrofit.

> usually the X axis isn't turning that fast.
> I would estimate that the 700 oz in holding torque motor would

provide about 500 oz in at about 40 rpm thus

> 500X6.28X5.1X2X.9/16 = 1801 lbs of force would give you plenty of

power yet good speed

> Dan Mauch
> economical 3D scanner software and kits
> low cost stepper and servo motors.
> cases for Gecko drives
> kits and assembled 3-4 axis drives
> www.camtronics-cnc.com
> www.seanet.com/~dmauch
> ----- Original Message -----
> From: bdrmachine
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Sent: Wednesday, November 21, 2007 6:04 PM
> Subject: [CAD_CAM_EDM_DRO] motor size?
>
>
> I need some help on a lathe conversion that I started. The

machine is a

> 14.5 by 40" manual lathe. I have a ballscrew with a 5mm pitch

installed

> in the cross feed. I currently plan on using a 2:1 timing belt
> arrangement to couple the motor to the axis. Before I get to

involved

> with this I would like some input as to what size stepper motor I

need?

> I realize this will depend on several factors that I have not

enclosed.

> What I'm looking for would be successes others have had in

similar

> retrofits.
>
> Thank
> Brian
>
>
>
>
>
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>