CAD CAM EDM DRO - Yahoo Group Archive

Re: Z axis force

Posted by cnc_4_me
on 2005-02-04 17:09:45 UTC
OK..using new number of 1200lbs instead of 1000 i used in last post
you need 38.2 in-lb to move table and you have 64 in-lb available.

Wally



--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
wrote:
> Wally, Its a 9 X 42 series 1. It requires 10 revs of the input
shaft to raise the table 1" . Acording to Bridgeport mfg., the table,
saddle and knee weigh 750 lbs +75 lb vise=825+ all three servos and
mounts 100 lbs=925 +estimated drill loading (dull bit) of 200
lbs=1125lbs. Factor in resistance in screw of at least 50lbs.=
1175lbs + resistance in the dovetail at least 25lbs= 1200 lbs. Those
are good numbers.
>
> I'll try to calculate this, it's probably wrong:
> 3.5" dia pulley mounted on Z shaft with a 10.99" circumference.
10.99"/.100"linear travel per rev =109.9:1 reduction. Each pound of
force on a 1.75" radius from the shaft would = 1.75 lbs rotational
force. 1.75X109.9=192.3 lbs lifted. 1200lbs/192.3=6.24 in lb required
to just equal the weight of the table. Divide the 6.24lbs/2.5
ratio=2.496 lb-in required from the servo to even begin to move it.
Now it has to be accelerated to 60 ipm. Which on mine is less than a
second.
>
> Ron
> cnc_4_me <cnc4me@g...> wrote:
>
>
> I am getting posts mixed up...Tell me again, what machine do you
have
> and what weight are you saying knee is...
>
> Wally
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers
> wrote:
> > Its an acme screw on Z.
> >
> > cnc_4_me wrote:
> >
> > /// Also, The servo is 2500 RPM. 2500 X 64% = 1600 RPM divided by
> 10
> > revs per
> > inch on the Z axis = 160 divided by 2.5 belt reduction= 64 ipm.
> > Exactly, what I
> > can achieve. Ron///
> >
> >
> > Do you have a ballscrew or a acme screw.
> >
> > Wally
>
>
>
>
>
>
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Discussion Thread

cnc_4_me 2005-02-03 22:32:41 UTC Declining motor torque with lower voltage. turbulatordude 2005-02-04 06:07:16 UTC Re: Declining motor torque with lower voltage. Stephen Wille Padnos 2005-02-04 06:55:50 UTC Re: [CAD_CAM_EDM_DRO] Declining motor torque with lower voltage. cnc_4_me 2005-02-04 07:46:41 UTC Re: Declining motor torque with lower voltage. Stephen Wille Padnos 2005-02-04 08:29:45 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. victorlorenzo@y... 2005-02-04 08:45:44 UTC Re: Declining motor torque with lower voltage. Jon Elson 2005-02-04 09:17:53 UTC Re: [CAD_CAM_EDM_DRO] Declining motor torque with lower voltage. R Rogers 2005-02-04 09:26:05 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 10:49:00 UTC Re: Declining motor torque with lower voltage. R Rogers 2005-02-04 12:20:04 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. R Rogers 2005-02-04 12:37:18 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 12:52:05 UTC Re: Declining motor torque with lower voltage. Polaraligned 2005-02-04 13:04:36 UTC Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 13:06:56 UTC Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 13:19:24 UTC Re: Declining motor torque with lower voltage. R Rogers 2005-02-04 13:29:22 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 15:02:22 UTC Z axis force R Rogers 2005-02-04 15:43:31 UTC Re: [CAD_CAM_EDM_DRO] Z axis force cnc_4_me 2005-02-04 15:50:19 UTC Re: Z axis force R Rogers 2005-02-04 16:00:06 UTC Re: [CAD_CAM_EDM_DRO] Re: Z axis force R Rogers 2005-02-04 16:36:31 UTC Re: [CAD_CAM_EDM_DRO] Re: Z axis force cnc_4_me 2005-02-04 17:04:47 UTC Re: Z axis force cnc_4_me 2005-02-04 17:09:45 UTC Re: Z axis force R Rogers 2005-02-04 17:59:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Z axis force cnc_4_me 2005-02-04 18:23:13 UTC Re: Z axis force Jon Elson 2005-02-04 19:36:30 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Stephen Wille Padnos 2005-02-04 20:00:06 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Jon Elson 2005-02-04 20:09:41 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-04 20:45:22 UTC Re: Declining motor torque with lower voltage. Stephen Wille Padnos 2005-02-04 21:52:28 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Polaraligned 2005-02-05 05:27:02 UTC Re: Declining motor torque with lower voltage. Lance Hopper 2005-02-05 06:15:18 UTC Re: Declining motor torque with lower voltage. R Rogers 2005-02-05 07:08:03 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-05 11:11:22 UTC Re: Declining motor torque with lower voltage. cnc_4_me 2005-02-05 11:18:10 UTC Re: Declining motor torque with lower voltage. R Rogers 2005-02-05 14:28:48 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Jon Elson 2005-02-05 17:15:52 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Jon Elson 2005-02-05 17:28:49 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. Jon Elson 2005-02-05 17:52:25 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage. R Rogers 2005-02-05 18:08:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Declining motor torque with lower voltage.