Yaskawa Servopacks any good?

rodw wrote:

So the drivers say they take 110 volt.

That's odd, Yaskawa are Japanese, and they use 200.
Is there possibly an input voltage selector?

If not, then I would guess that Aus building sites use 220 -> 110 transformers in abundance, try finding one of them.
(example: www.ebay.co.uk/itm/FAITHFULL-3-3-KVA-SIT...a:g:rOYAAOSw4GVYHGPZ )

Well.....yes to a certain extent. If they take step/dir, no problem at all. If they use 0-10V on two separate inputs for 2 directions, usable but limited to 50% or 33% speed depending on the parallel port voltage 5V or 3.3V. If they use normal +-10v that would require a bit more work and transistors and resistors.......leme do some thinking on how to do that, a quick think blitz and 2 versions, one that can do half of parallel port voltage on one direction and half on the other direction, and a more complicated one that can do full parallel port voltage. That means version 1 can do +-1.6V or +-2.5V and version 2 can do +-3.3V or 5V.....scratch that, they can do that minus 0.6 to 0.7V drop on the transistors....hmmmmm.....not much but still usable for playing.....ehm scientific use ! Need more time .....or more speed!

tommylight wrote:

If they use normal +-10v that would require a bit more work and transistors and resistors.......leme do some thinking on how to do that,

I came up with this to to 0-10V from a 5V parallel port, but it ought to work for +/-10V too.

goo.gl/photos/eu6AuGT4JdfCUDaKA

Some time later I found that you can get push-pull optos, and they work better for the 0-10V case.

andypugh wrote:

I came up with this to to 0-10V from a 5V parallel port, but it ought to work for +/-10V too.

goo.gl/photos/eu6AuGT4JdfCUDaKA

Some time later I found that you can get push-pull optos, and they work better for the 0-10V case.

That is even beter and simpler, it just requres anothe low power supply for 10V or +-10V. In the +- case it would just need to be wired a bit differently, namely the now gnd on the drive side would have to be wired to -10V and the power supply 0V wired to drive common or gnd.
Taking a bow to Andy for the idea.
Thank you.