On 07/02/2015 08:05 PM, Gene Heskett wrote: > Generally its about .008" off the math at the end of an inch > on the dial.
Sometimes ball screws are sold as .2" per turn, but they're actually 5mm, or .1" per turn and maybe they're 2.5mm. I think that should result in close to .016" error per inch instead of .008". Any chance, given the other issues you've had with the eBay vendor, that you might have some class of imperial/metric problem similar to that? Either way, you shouldn't need to sneak up on it. You should be able to move an inch, measure the error, and recalculate the scaling factor... although you might need to work backwards a bit to get the right numbers to plug into the configuration wizard that calculates the scaling factor from the various motor linkage parameters, in much the same way that I work my sales tax forms backwards. Like encryption's one way hash functions, the sales tax form is much easier to calculate in one direction and much more complicated in the direction the department of revenue wants me to work it, so I start with the answer that I know and work backwards to supply the supporting data in their little boxes. :-/ Despite the "issues" you've had, you're making great progress. I'm envious. Good luck with it. ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
