Re: 5-axis machine controller

[Jon Elson <jmelson-at-artsci.wustl.edu>]

"D.F.S." wrote:

>
> So I could also use 12V input to the coils, a 2.5 Ohm Resistor -at- 40 Watt
> OR 5V .75 Ohm and 12 Watt?
>
> As such the trade-off is one of torque and speed VS Input Voltage and
> power Dumped by the Resistor?
>
> How much of a disadvantage are we talking about?

It could be a LOT.  If you use 5 V supply and a 4 V motor, you are only getting
about 1 volt to overcome the inductance of the motor.  That could limit the
motor to tens of steps a second before the torque goes practically to
zero.  It might take you a LONG time to mill those first boards!

Jon