--- In DynoMotion@yahoogroups.com, "dotma99" <edward@...> wrote:
>
> Hi Tom
>
> I think it is likely to be a board problem as I have been running this set up for a number of months, and I am not putting much stress on it. In addition, I have temporarily replaced it with a $45 sparkfun quadstepper board which works OK (though a touch low on torque).
>
> Could I send the board back for you to test? Do you have any particular mailing instructions?
>
> regards
>
> Edward
>
> The motors I am using are small Nema17 steppers. I have been using a 24v switching power supply.
>
> http://www.zappautomation.co.uk/en/nema-17-stepper-motors/373-sy42sth47-1684a-high-torque-hybrid-stepper-motors.html
>
> Model No.
> SY42STH47-1684
>
> Voltage
> 2.8V
>
> Current (phase)
> 1.68A
>
> Inductance (Phase)
> 2.8mH
>
> Holding Torque
> 4.4kg/cm
>
> I am supplying 5v to the board from a Kanalog.
>
> Connecting two drivers to the same step/direction signals has not caused me problems in the past. My machine has 9 steppers, so I am short of a channel to slave them all as you suggest.
>
>
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes wrote:
> >
> > Hi Edward,
> >
> > That doesn't sound good.  It would appear the board is somehow damaged.  It might not make sense to use a voltmeter on the output with no motor connected.  But if the Board has Motor Power, +5V, and is Enabled (all 3 KFLOP LEDs on) then all 4 of the motors should be energized and have holding torque.  If they don't then something must have gone wrong with the board.  I haven't heard of any other such problems.  Strange that two channels would have problems. What type of motors exactly are you using?  How are you supplying +5V to KSTEP?  It isn't clear how you are driving two channels from one set of Step/Dir signals.  We would normally recommend slaving two axes together, but I don't see how that could cause a problem with no drive to the motor.
> >
> > I suspect you will need to return the board so we can analyze and repair it.
> >
> > Regards
> > TK
> >
> >
> >
> >
> > ________________________________
> > From: dotma99
> > To: DynoMotion@yahoogroups.com
> > Sent: Friday, December 21, 2012 6:25 AM
> > Subject: [DynoMotion] Problem with KStep
> >
> >
> >  
> > Hi Tom
> >
> > I am having a strange problem with Kstep. I am using it to drive small steppers for an A and B axis, each axis with two steppers with the pairs of step and direction signals (from a kflop) connected together.
> >
> > This setup has worked fine for 20 plus hours, but when I switched on today, there appears to be no output to two of the steppers (one of each pair).
> >
> > When I disconnect the steppers and power up, I get 23.9V from the pairs on J3 and J4, but no voltage from J2 and J5. (I am using 24V power).
> >
> > So far as I know, I have made no changes, and nothing looks fried!
> >
> > Any ideas?
> >
> > best
> >
> > Edward
> >
>

 

Hi Tom

I sent the kStep board back to you about three weeks ago (from the UK). Could you confirm that you have received it; or not?

Thanks

Edward

--- In DynoMotion@yahoogroups.com, "dotma99" <edward@...> wrote:
>
> Hi Tom
>
> I think it is likely to be a board problem as I have been running this set up for a number of months, and I am not putting much stress on it. In addition, I have temporarily replaced it with a $45 sparkfun quadstepper board which works OK (though a touch low on torque).
>
> Could I send the board back for you to test? Do you have any particular mailing instructions?
>
> regards
>
> Edward
>
> The motors I am using are small Nema17 steppers. I have been using a 24v switching power supply.
>
> http://www.zappautomation.co.uk/en/nema-17-stepper-motors/373-sy42sth47-1684a-high-torque-hybrid-stepper-motors.html
>
> Model No.
> SY42STH47-1684
>
> Voltage
> 2.8V
>
> Current (phase)
> 1.68A
>
> Inductance (Phase)
> 2.8mH
>
> Holding Torque
> 4.4kg/cm
>
> I am supplying 5v to the board from a Kanalog.
>
> Connecting two drivers to the same step/direction signals has not caused me problems in the past. My machine has 9 steppers, so I am short of a channel to slave them all as you suggest.
>
>
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes wrote:
> >
> > Hi Edward,
> >
> > That doesn't sound good.  It would appear the board is somehow damaged.  It might not make sense to use a voltmeter on the output with no motor connected.  But if the Board has Motor Power, +5V, and is Enabled (all 3 KFLOP LEDs on) then all 4 of the motors should be energized and have holding torque.  If they don't then something must have gone wrong with the board.  I haven't heard of any other such problems.  Strange that two channels would have problems. What type of motors exactly are you using?  How are you supplying +5V to KSTEP?  It isn't clear how you are driving two channels from one set of Step/Dir signals.  We would normally recommend slaving two axes together, but I don't see how that could cause a problem with no drive to the motor.
> >
> > I suspect you will need to return the board so we can analyze and repair it.
> >
> > Regards
> > TK
> >
> >
> >
> >
> > ________________________________
> > From: dotma99
> > To: DynoMotion@yahoogroups.com
> > Sent: Friday, December 21, 2012 6:25 AM
> > Subject: [DynoMotion] Problem with KStep
> >
> >
> >  
> > Hi Tom
> >
> > I am having a strange problem with Kstep. I am using it to drive small steppers for an A and B axis, each axis with two steppers with the pairs of step and direction signals (from a kflop) connected together.
> >
> > This setup has worked fine for 20 plus hours, but when I switched on today, there appears to be no output to two of the steppers (one of each pair).
> >
> > When I disconnect the steppers and power up, I get 23.9V from the pairs on J3 and J4, but no voltage from J2 and J5. (I am using 24V power).
> >
> > So far as I know, I have made no changes, and nothing looks fried!
> >
> > Any ideas?
> >
> > best
> >
> > Edward
> >
>