http://www.applied-motion.com/products/stepper-motors?frame_size[]=NEMA 23&mm_replace=true&utm_campaign=10917&custom1=eb649074756e11e39ef312313d0605d8&utm_term=nema 23 stepper motors&utm_medium=google&mm_campaign=BCA8F52450619FE50A4978DCAF6D4C39&utm_source=trada&keyword=placeholder&utm_content=37528935791&utm_nooverride=1 So many what is everyone using on what kit? Should we all want this bad boy NEMA 17 http://www.applied-motion.com/products/stepper-motors/17068-2-18s HT23-597 NEMA 23 oz / in 177 $65.00 17068-2-05S NEMA 17 oz/in 105 $249.00 Why would you use the NEMA 17, why are we? I think i will move to cheaper NEMA 23 makes £ sense 2 me. http://www.applied-motion.com/products/stepper-motors/4023-820 $18 each. ADarkGerm
Expensive motors at 76 oz of torque for a NEMA 23 must have a very small can, this is close to the same torque for OpenBuilds Part Store NEMA 17 stepper (custom). The NEMA 23 we are hoping to stock soon in the part store will be 12.6 kg.cm or 177 oz torque and will not cost 65 bucks I would love to try this out but @ 1pc. - $249.00 its out of park
Normally the 17's are less expensive than the 23's. Not sure why they have their pricing set up this way. We use 17's because they are lighter and smaller and fit right in on most smaller size machine builds. When more torque is needed, we upgrade to the 23's. That's how we do it most of time for most of the builds but I see what you mean and this is a good option when roughly the same torque is needed without concern for weight or space. Thanks for the link
I would like to get my hands on a few of these gear boxes, we could make super powerful light weight machine routers. I am going to keep an eye open for a similar (cheaper) alternative to this for the 17's Thanks again for the link its got me pointed in the right direction. Found these that look like they would be nice to try out depending on the price http://www.anaheimautomation.com/products/gearbox/planetary-gearbox.php?tID=1089&pt=t&cID=30
Gear boxes make the difference to me as i am after very fine tolerances. We need to look into what set-ups give what resolution on the primary 3 Axis. Then builders would consult a guide to help pick kit. Plus what the difference in tolerance is between actuator systems, belt vs rod vs magnetic levitation linear actuator. http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1024605&url=http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1024605 http://wonjongkim.tamu.edu/pdf/papers/tia05.pdf When you use the latter, weight issues goes away, as mass can be compensated with magnetic fields. This is the ultimate linear actuator, why is no one talking about electromagnetic with no motor?. We should build these, anyone fancy funding me?
I have been looking into gear reduction for finer precision in place of going with more micro stepping and/or .09 steppers. It's more of an analog approach and I like what I see so far. Its cheaper to do and allows a range of setups. Mag rails are cool but they get expensive as the trap is always better magnets for more forces. They are cool though You have to set aside a budget for FUNding
US dreamers don't have budgets, leave that to the accountants. Money is holding back HUMAN progress, that's why they want to move all the FIAT currency offshore, not to spend. Just so the country has less to spend in the pot. They devalue what we have. Almost like they want sheep! Don't use magnets they need rare earth elements, use electromagnets. This is why corporations are purchasing Africa & Spain. Rare Earth elements. Not OIL. Only work with power on. Not permanent. Don't move a mountain, go to it. Mass is not an issue if you factor it out. $0.02
