Re: Stepper motors with built in PS versus ones without
Just to make sure I'm not going crazy... there is NO spec on this page:
https://cnc4pc.com/rsd110-6-ac-line-...tml#prodtabs-3
for the amperage or wattage being delivered to the steppers... right? They make absolutely no claim for the amount of POWER delivered.
And, if I read the description correctly, it is NOT a built in power supply at all... They are directly applying 110 volt AC to the motor leads. I base that on this text copied from the page:
Warning: This device produces lethal electrical current. By purchasing this drive you agree that Rex Machine Industries is not liable for injury or peoperty [sic] damage resulting from use of this drive.
Application Note:
Due to the high voltage applied to the motor's windings, many steppers need to be configured in series as they may overheat in parallel...
...
This is not the case when
110-120VAC is rectified within the drive to 150-160VDC.
So if you hook this up to a stepper motor rated for e.g. 60 volts, where the motor manufacturer used winding insulation that is rated up to maybe 120 volts, this thing could easily burn the motor out.
Not to mention electrocute you if you accidentally touch the motor leads.... I guess that's always a possibility, but... damn...
And no word on how much amperage / power is delivered.
I'd almost like to see someone try it just to find out if their motors (and themselves) survive!
James hosts the single best wiki page about steppers for CNC hobbyists on the net:
http://www.piclist.com/techref/io/steppers.htm Disagree? Tell him what's missing! ,o)