CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions

Posted by david cutajar
on 2018-09-24 14:08:42 UTC
I agree with Dennis, we use profile rail ( THK, HiWinn, Nook, Bosch etc.) all the time on the special machines we produce. And they are the best option. You can get non-bearing type too depending on your application.

I am just chiming in, because your tolerances are very tight and I am not sure these rails will get you there. Mcmaster is a great company, if you email them they answer quickly. I would ask what the tolerance per ft. is with these. If you can loosen your tolerance or if they meet your requirements they are def. the way to go,

Also if you contact a profile rail distributor, they can spec something out for you - ie. a higher preload blocks for tighter tolerances you can buy. These can be really stiff to move.. (depending).
 Sometimes if we are using profile rail for only material handling we order the blocks with a lower tolerance (or we replace with slightly smaller balls) because we do not need the accuracy and /or are mounting to an imperfect surface over many feet.

Just my $.02 but you should be able to find something  for your application in your price range.

-Dave
 
DJC Engineering LLC; DJC Products INC.
56700 Mound Road
Shelby Township, MI 48316

shop (586) 992-1352; fax (586) 992-3527; cell (586) 484-3232


From: "Denis Knobloch dkmach2@... [CAD_CAM_EDM_DRO]" <CAD_CAM_EDM_DRO@yahoogroups.com>
To: "CAD_CAM_EDM_DRO@yahoogroups.com" <CAD_CAM_EDM_DRO@yahoogroups.com>; "CAD_CAM_EDM_DRO@yahoogroups.com" <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, September 24, 2018 7:18 AM
Subject: RE: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions

 
Tim, take a look at McMaster Carr part numbers 6250K32, and 6250K34 on their website mcmastercarr.com. These two items are within your $500 budget. The rail can be mounted to something solid, and shimed to be true to your specifications. There are many other sizes and options to choose from.. One of the larger rails may even work unsupported throughout except at each end.

Denis K.


On Mon, Sep 24, 2018 at 1:55 AM, timg@... [CAD_CAM_EDM_DRO]
<CAD_CAM_EDM_DRO@yahoogroups.com> wrote:
 
Good questions.

Deviation vertically is the critical direction. 

For expensive, I'll put a $500 budget on it.

Thanks for the suggestion of the supported rail.

Tim G
Denver, CO


---In CAD_CAM_EDM_DRO@yahoogroups.com, <ajsmith1968@...> wrote :

Defection in which direction?



Define ‘expensive’, especially in the context of no deviation.



Supported rail is pretty cheap these days: https://www.aliexpress.com/item/one-set-SBR16-800mm-with-2-blocks-sbr16uu-Linear-Motion-guide-supported-rail-SBR-linear-shaft/32726991216.html



Bolting a couple of those to something reasonably stiff might work.



Tony





From: CAD_CAM_EDM_DRO@yahoogroups.com [mailto:CAD_CAM_EDM_DRO@yahoogroups.com]
Sent: Saturday, 22 September 2018 2:33 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions




Considering creating a special application machine that would require a single axis with 22" of travel. It will not have to carry more than 10 lbs, but needs to have less than .0005" or better .00025" deviation under the spindle through out the entire travel.



Not worried about how to drive it mechanically or electronically. Just looking for ideas on the least expensive way to build physical parts of the stage.



Ideas?



Thanks,

Tim G

Denver, CO










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Discussion Thread

2018-09-21 09:45:35 UTC 22" travel single axis suggestions Tony Smith 2018-09-22 05:45:04 UTC RE: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions 2018-09-23 23:55:08 UTC RE: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions Denis Knobloch 2018-09-24 04:17:12 UTC RE: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions david cutajar 2018-09-24 14:08:42 UTC Re: [CAD_CAM_EDM_DRO] 22" travel single axis suggestions