Re: Making Stepper Pullys

--- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote:

> Although it is stated in some catalogs that the shape is involute.
>
> Most of the stepper pulleys can be cut with a trapezoid shaped
>tool.
> The critical dimensions, are the OD of the blank, The angles of the
>cutter,
> and the width of the tip of the tool, and the depth of the cut. If
>we can
> input the number of teeth, and the pitch, hopefully a program will
>compute
> these values.
> bill
>

Bill,
Look in the files section for a file called Pulley.jpg
The description is "Screenshot of Excel Spreadsheet"
This show the spreadsheet with the first three columns filled in at
random.
From this information you have ALL the details required to cut a
pulley.

John S.

PS. The shape is NOT involute at all