On 21 February 2015 at 13:16, Tobias Gogolin <usert...@gmail.com> wrote:
> he thinks he would be fine with inexpensive steppers, I > am suggesting small geared brushless motors, so I am hoping for an expert > opinion > The internet is full of opinions, but it is hard to decide how expert they are :-) There are thousands of printers out there that have steppers and that work. There is no reason to think that steppers are not a perfectly adequate solution. There are so many that the motors have also become very cheap, as have the drivers for the motors. A brushless motor solution will be more expensive, both for the motors and the drivers. You may end up with a "better" solution, but you have to think about what problems you are trying to solve, given that the stepper-driven machines all seem to work. There is a halfway house, Leadshine, Vexta and others are now offering closed-loop stepper motors. A stepper motor and a brushless motor are largely identical, a stepper is just a very high pole-count 2-phase brushless motor. Some manufacturers are capitalising on this by adding an encoder and a smart motion controller that uses the encoder. This is an example of the type. http://www.ebay.co.uk/itm/161481647080 I am not recommending that one, you still need to decide on your requirements. All that being said, I can't see myself building any more stepper-driven machines. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
