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:
Screws.html
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:
>typical Acme
> 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
> screw by a factor of around 2. The figures I have seen quoted arein the
> 20-40% range, not 60-70% as you state. Googling on "acme leadscrew
> efficiency" turned up these references:http://www.reedlink.com/ProductInfo~Productid~77865~ProductName~Lead-
>
> http://www.roton.com/index.php?section=6#9
>
>
Screws.html
>likely cost
> 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
> more than a "typical" ballscrew with a similar performance.efficiency
>
> So in reality, I don't think you will see a lot of difference in
> between "typical" V-form and Acme thread leadscrews - andcertainly 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?