Re: Stepper Size Selection

super simple.

ask others what they did. some will report under power others very
happy.

make sure you get it for the screws you plan to use. ball or acme.

Dave




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "dnaman43" <mevagissy@...>
wrote:

>
> I want to convert a small-mill (large minimill) to CNC and have a
> couple of very basic questions:
>
> 1. How does one initially determine the size (torque) of stepper-
> motor required?
>
> I can check the static torque, on the leadscrew, to move the table
> but I imagine there's more to it and that dynamic torques are what

is

> really needed.
>
> 2. What are the trade-offs between using a stepper directly coupled
> to the leadscrew versus one connect with, say, a stepup/down

toothed

> belt drive consisting of a sprocket on the motor and another on the
> leadscrew?
>
> Obviously there's a torque/speed tradeoff here but are there any
> other considerations related to dynamic belt-stretch for example

(or

> anything else)?
>