--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Sahil,
>
> Yes you can connect leave any of the motors unconnected without any problem.  Do not connect or disconnect any motor with power applied to KSTEP.
>
> Yes a linear unregulated power supply will work with KSTEP but a regulated supply may work better.  The no-load voltage should never go higher than 48V or KSTEP is likly to be damaged.   Low cost regulated switching supplies are available so most Users use those.
>
>
> Power supply rating calculations are fairly complex.  Basically you should look at from a power viewpoint rather than a current viewpoint.  KSTEP is very efficient (~100%) so all the energy from the power supply goes into heating the motor and generating work.   When stopped or moving slowly only a few watts per motor will be needed to maintain 5A flowing through a coil.  Power = I^2 R as heat.
>
> KSTEP can have current regulation problems in some extreme cases where low resistance motors are used with high voltage supplies.   This occurs in some cases where the supply voltage is higher than 10X the rated motor voltage.
>
> Regards
> TK
>
>
>
> ________________________________
> From: Sahil <sahil_atlury@...>
> To: DynoMotion@yahoogroups.com
> Sent: Wednesday, August 1, 2012 6:28 AM
> Subject: [DynoMotion] Re: How to Enable individual motor axis in K-Step ?
>
>
>  
> Hello Tom,
>
> So i can connect one stepper motor to K-step, keep rest of motor connections open and i'm ready to test my axis correct ?
>
> I'm planning on using a linear power supply or simply put a large (1000KV) 30AC transformer with necessary rectification-filtering.
>
> Will this type of power supply work with K-step ?
>
> will i face any problems with power supply when no-load voltage is higher then 48volts ? and how do i size the ampere rating of power supply under full-load assuming the motor is a Bi-polar, parallel connected @ 5.0 amp rating per phase ?
>
> Thanks
>
> sahil
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Sahil,
> >
> > It is perfectly fine to leave any of the motor outputs disconnected and enable KSTEP.
> >
> >
> > Never connect or disconnect a motor with power applied to KSTEP.
> >
> > Regards
> > TK
> >
> >
> >
> > ________________________________
> > From: Sahil <sahil_atlury@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Sunday, July 29, 2012 11:38 PM
> > Subject: [DynoMotion] How to Enable individual motor axis in K-Step ?
> >
> >
> >  
> > Hello everyone,
> >
> > This is sahil from India, i'm new to dynomotion products,
> > i have a K-step board with K-motion controller and like to test various motors individually on each axis one at a time to optimize the settings. Now can i just connect one stepper motor to the k-step in anyone of the axis (terminals) and keep rest of the axis terminals open or left out? will this short-out the circuit ?
> >
> > or is there a way to enable each axis separately via the controller (read the instructions it show that a single enable signal will work for all axis ?) ?
> >
> > please help
> >
> > thanks
> >
> > sahil
> >
>