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

Hi Horace.

I agree that changing the ball screw to a finer 5 mm lead pitch will be a
better solution. In fact, I have a 5 mm lead pitch ball screw in reserve.

However, it will be easier to make a belt/pulley reduction as changing the
ballscrew will mean machining the ballnut/bearing holder. I will give the
belt/pulley reduction a first try.

At the end, a combination of belt/pulley reduction and finer pitch ball
screw may be the ultimate solution.

Regards,
WT

----- Original Message -----
From: Horace, T.L.Ho
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Thursday, November 09, 2006 7:13 PM
Subject: [CAD_CAM_EDM_DRO] Re: Z-Axis problem - Not Enough Torque?


Hi WT,

If possible I suggest that you change the ballscrew of Z-axis, as
others have said, the pitch is too course. It seems that the ball
screw is for some sort of fast movement applications, not for mills.
Even if you add a reduction gear, the force on the threads is still
the same, way too big IMHO. It's better to find a ball screw which
has 5 mm lead.

Regards,

horace.