CAD CAM EDM DRO - Yahoo Group Archive

Re: What makes a machine CNC ready?

Posted by ballendo
on 2006-06-28 03:46:03 UTC
Tony,

The efficiency of a HIGH lead acme screw can get pretty close to a
ballscrew...
And its sliding contact has other advantages where dust and swarf
are a factor. Adding to this, it does not suffer from repetitive
short cycles of distance moved the way ballnuts do.
(Interestingly, the vee roller bearings Fred uses on his machine DO
suffer from this; sop perhaps it all ends up "a wash"<G>)

You can look at several MFR. sites to see this. (I see Fred has
already posted a few.)

At low leads, I agree with your assessment. Also Fred is using Kerk
screws/nuts I believe, and these are teflon coated which does
improve the efficiency as well; but at a prohibitively high price
IME for onesie twosie hobby use purchases. (Kerk is really set up to
provide for OEMs IMO/E.)

Hope this helps,

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Tony Jeffree <tony@...>
wrote:
>
> At 18:38 27/06/2006, you wrote:
> >This is an article of mine that appeared in the Digital Machinist,
> >special edition of Home Shop Machinist.
>
> Fred -
>
> Nice article, but I think you exaggerate the efficiency of the
typical Acme
> screw by a factor of around 2. The figures I have seen quoted are
in the
> 20-40% range, not 60-70% as you state. Googling on "acme lead
screw
> efficiency" turned up these references:
>
> http://www.roton.com/index.php?section=6#9
>
>
http://www.reedlink.com/ProductInfo~Productid~77865~ProductName~Lead-
Screws.html
>
> http://www.desktopcnc.com/articles/leadscrews.htm
>
> I have seen claims for Acme screws that are almost as efficient as
> ballscrews (85%), but these are very much the exception & would
likely cost
> more than a "typical" ballscrew with a similar performance.
>
> So in reality, I don't think you will see a lot of difference in
efficiency
> between "typical" V-form and Acme thread leadscrews - and
certainly not a
> factor of 2.
>
> Regards,
> Tony
>

Discussion Thread

Fred Smith 2006-06-27 10:39:41 UTC What makes a machine CNC ready? art 2006-06-27 13:21:38 UTC Re: [CAD_CAM_EDM_DRO] What makes a machine CNC ready? Tony Jeffree 2006-06-27 13:40:21 UTC Re: [CAD_CAM_EDM_DRO] What makes a machine CNC ready? Fred Smith 2006-06-27 14:30:21 UTC Re: What makes a machine CNC ready? lcdpublishing 2006-06-27 15:00:08 UTC Re: What makes a machine CNC ready? Tony Jeffree 2006-06-27 15:08:57 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? Steve Blackmore 2006-06-27 16:05:14 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? ballendo 2006-06-28 03:46:03 UTC Re: What makes a machine CNC ready? Tony Jeffree 2006-06-28 04:20:48 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? R Rogers 2006-06-28 06:38:44 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? Tony Jeffree 2006-06-28 06:47:44 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? turbulatordude 2006-06-28 09:09:42 UTC Re: What makes a machine CNC ready? ballendo 2006-06-28 14:56:42 UTC B/S vs. acme was Re: What makes a machine CNC ready? R Rogers 2006-06-28 17:25:43 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? JanRwl@A... 2006-06-28 18:39:01 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Peter Homann 2006-06-28 19:10:08 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? R Rogers 2006-06-28 19:44:27 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? George Taylor, IV 2006-06-28 19:58:13 UTC RE: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Jon Elson 2006-06-28 20:38:32 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? ballendo 2006-06-29 00:54:59 UTC B/S vs. acme was Re: What makes a machine CNC ready? Tony Jeffree 2006-06-29 00:56:05 UTC RE: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? ballendo 2006-06-29 00:59:17 UTC B/S vs. acme was Re: What makes a machine CNC ready? Tony Jeffree 2006-06-29 01:04:48 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Lester Caine 2006-06-29 01:35:49 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Lester Caine 2006-06-29 01:43:22 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? ballendo 2006-06-29 02:35:10 UTC B/S vs. acme was Re: What makes a machine CNC ready? Lester Caine 2006-06-29 03:08:47 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Philip Burman 2006-06-29 03:19:53 UTC B/S vs. acme was Re: What makes a machine CNC ready? lcdpublishing 2006-06-29 04:16:39 UTC B/S vs. acme was Re: What makes a machine CNC ready? Fred Smith 2006-06-29 06:31:57 UTC Re: What makes a machine CNC ready? Alan Marconett 2006-06-29 08:04:48 UTC RE: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? R Rogers 2006-06-29 08:07:45 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? turbulatordude 2006-06-29 08:08:23 UTC B/S vs. acme was Re: What makes a machine CNC ready? Wayne Weedon 2006-06-29 10:01:08 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Andy Wander 2006-06-29 13:57:25 UTC RE: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? lcdpublishing 2006-06-29 15:07:24 UTC B/S vs. acme was Re: What makes a machine CNC ready? skullworks 2006-06-29 17:36:16 UTC B/S vs. acme was Re: What makes a machine CNC ready? Jon Elson 2006-06-29 18:54:56 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Jon Elson 2006-06-29 19:03:47 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Alan Marconett 2006-06-29 19:45:57 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? Alan Marconett 2006-06-29 19:55:19 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? turbulatordude 2006-06-29 23:06:55 UTC B/S vs. acme was Re: What makes a machine CNC ready? Vlad Krupin 2006-06-30 00:00:28 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? turbulatordude 2006-06-30 00:03:13 UTC B/S vs. acme was Re: What makes a machine CNC ready? Tony Jeffree 2006-06-30 00:15:22 UTC Re: [CAD_CAM_EDM_DRO] B/S vs. acme was Re: What makes a machine CNC ready? cnc002@a... 2006-06-30 08:09:55 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? R Rogers 2006-06-30 08:45:40 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? cnc002@a... 2006-06-30 11:00:43 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? JanRwl@A... 2006-06-30 12:47:42 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? turbulatordude 2006-07-01 07:11:50 UTC Re: What makes a machine CNC ready? deepcavity 2006-07-01 08:19:13 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? JanRwl@A... 2006-07-01 12:42:41 UTC Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready? Darren Lucke 2006-11-14 18:57:46 UTC Re: [CAD_CAM_EDM_DRO] What makes a good CAD operator? OT? Andy Wander 2006-11-14 19:56:55 UTC RE: [CAD_CAM_EDM_DRO] What makes a good CAD operator? OT? Darren Lucke 2006-11-14 20:21:22 UTC RE: [CAD_CAM_EDM_DRO] What makes a good CAD operator? OT?