Sven Wesley wrote:
> This is soooo frustrating! When setting the PID the servo's accelerates so
> fast I have to clamp the to the bench. When running with the rest of the
> system it's just poor performance.
> I do think that my servo's are powerful enough for this machine.
What is the torque of your servos? (in Nm)
I have also been thinking of replacing my steppers with servo motors.
My current steppers are 6.4 Nm but with steppers the torque goes down
when moving. If I remember well, then servos are specifying the torque
during a move - meaning that I could do with smaller servos.
Somehow I am a bit scared to invest lots of money in servos and matching
drivers.
When I started with servo systems, you just had the three phase servos
with 'resolvers' a similar 3-phase analogue encoder on top if it.
Nowadays we have AC servos, Brushless DC servos and DC servos with brush.
I almost bought a complete set of motors/drivers plus a matching CNC
controller from one of those Chinese companies but I like EMC way too
much to really do this ;-)
Setting up and tuning the servos is no problem but I want to prevent the
blue smoke (resulting from my swearing) ...
My current machine uses 6.4 Nm motors and a 5i20 card from Mesa. I have
a spare one so I could configure a second system to test with servos - I
just need to know what to buy / what to look for when buying stuff.
Any advice is welcome.
Regards,
Rob
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