Re: [CAD_CAM_EDM_DRO] Z-Axis problem - Not Enough Torque?

Hi, Brian.

Thank you for pointing out the way to do a counterweight for the Z-axis
head/column and it gave me another perspective of how to do the Z-axis.

However, it was entirely my fault that I did not make myself clear on how I
did my Z-axis. I did not motorized the Z-axis head/column but instead, I
only drive the spindle head (or, is it called quill?).

Here are some pictures of what I did:
http://i14.tinypic.com/344unnm.jpg
http://i14.tinypic.com/2m5ge90.jpg

Considering the above, I believe I do not have to counterweight the Z-axis
column. Or, am I wrong? (And it will not be the first time I made mistakes
in my CNC venture :-)

Regards,
WT

----- Original Message -----
From: Brian Worth
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Thursday, November 09, 2006 12:15 AM
Subject: Re: [CAD_CAM_EDM_DRO] Z-Axis problem - Not Enough Torque?


Hi WT,

The point I was making was not to do with rigidity,
but with a counter-weight to balance the weight of
your
z-axis. Imagine 2 weights on either side of a pulley?
you can balance the weights and then your steppers
wont have to work so hard.

Regards,

Brian

--- WT <pharmapack@...> wrote:

> Hi, Brian.
>
> Thanks for the website but I believe the problem is
> not related to the
> rigidity of the spindle head or column.
>
> With my very coarse ballscrew (and hence, less
> friction compared to the
> original leadscrew), the stepper motor I used simply
> did not have enough
> power or torque to hold its Z position considering
> that I did not even use
> pulley reduction.
>
> Regards,
> WT
>
> ----- Original Message -----
> From: Brian Worth
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Sent: Wednesday, November 08, 2006 10:42 PM
> Subject: Re: [CAD_CAM_EDM_DRO] Z-Axis problem - Not
> Enough Torque?
>
>
> Hi,
>
> Maybe you could rig up a counterweight affair
> similar
> to what this guy did on his mill?
>
> http://www.pathcom.com/~vhchan/cnc/cnc.html
>
> Regards,
>
> Brian
>