Re: Steppers

--- In CAD_CAM_EDM_DRO@y..., Gene <capper@i...> wrote:

> If you drive two motors from the same Gecko drive do you need to
> increase the amps or make any other changes?

While in theory driving two parallel motors from on drive seems
reasonable, I'm not sure it is a good idea. If the motors are
mechanically linked 1:1 or identically matched then it should work.
The voltage stays the same and current would approximately double.
If there is a mismatch in the system you could see some funky
things. Maybe some of the others in the group that have had some
experience with this might be able to give you better details. If you
are going to build a dual drive system without mechanical linkage
between the two then two steppers with two drives also will get out
of sync. One of the group made a good suggestion to put hard stops
on each side and drive the motors against them until they stall.
Works okay on steppers.

I am building a large gantry table with a dual YY and decided to use
servos and seperate motor contollers (Gecko 340's) for each side. I
had to design a way to "square" the gantry in the case where there
was a small mismatch. By putting a Home switch on each side and
running the Home signal through a set of logic gates it will stop the
first motor to find a home switch and continue to drive the other
until it finds it's home switch. Once both sides are at home the
Home signal is sent back to the controller program to stop the pulses.
It will automatically square the gantry each time it returns to 0.