Our first of these two machines actually had the racks and pinions replaced while still under factory warranty. We are only cutting MDF with them (just lots of it). The flaws I see with the machines are, spring loaded engagement of the pinion to rack, (lets pinion pull out of rack under heavy loads (like rapid accel), support bearings for the pinions and transmission shafts are to close together and overloaded. I don't want to start dissing the Manufacturer they have stood behind the product, the machine design just isn't well suited for us and our application.
Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -- P. Graham Dunn Phone: 330-828-2105 E-mail: [email protected] 630 Henry St. Dalton, OH 44618 www.pgrahamdunn.com -----Original Message----- From: Viesturs Lācis [mailto:[email protected]] Sent: Monday, July 23, 2012 9:28 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] [Off] Ballscrew Support? 2012/7/23 Todd Zuercher <[email protected]>: > And the quality of the cut at > federates above 200ipm leaves much to be desired compared to our > similarly sized and specked ball screw driven machines. To give them > credit we are using them much harder than they were designed for, we > run'em 24hr 5 days a week, and have more than twice as many machining > hours on them than any other machine the manufacturer knows of. Well, the last sentence explains it all. Machine is 7 years old, so it means - life of racks is about 2-3 years. IMHO that is not bad, especially, when You mention the conditions of their use. And I am sure, that You know - running ballscrews over their rated load would lead to the same result. Just that ballscrews could have higher rated load... I have racks and pinions in waterjet machine, they work very nice. I like them, because their maintenance is something I can do myself. I would not like to start changing balls in ballscrew or something like that... -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
