Hi Dave.
I also want to ask about if interrupted load on the motor can be count as
oscillation?
Than I need start motor into one direction and change the load on and off (put
a brake on the shaft).
I also pick AC servo motor for Bridgeport mill from servo dynamic
IG 42 BS 180 or IG 42 BS 360. These both motors have good torque to move mill.
What do you think about those AC servomotors?
Thanks
aramk
________________________________
Hi Dave
I think that some constant load on the motor make yellow line flat - straight
one.
So, I removed all pulleys from shaft of motor and that made motor ran free.
After I did that, and call X cmd pos, ran motor front and back and I can see
some perpendicular part (0.4") to the horizontal yellow line.
Does that mean something?
Thank you,
aramk
On Dec 12, 2006, at 2:07 AM, Kasparov, Aram wrote:
> Hi Dave
>
> I am using MESA 5i20 card. Is any difference in tune up process
> makes type of card that in use? (MESA vr VITAL)
Not that I know of.
Tuning in velocity mode is a bit different than tuning in torque mode
but the goal is the same.
>
>
> Also, what is exact definition of "oscillate"?
to move back and forth in a periodic manner as in a pendulum; sine
wave.
>
> Any motion of motor should send some signals and oscilloscope
> should show waves. If oscilloscope can't show wave it means that
> oscilloscope is not sensitive enough.
>
plotting position vs time should give you a nice sine wave at a given
frequency.
> So, can I say that oscillate means any motion of motor?
No, motion in one direction is not oscillation; only when it goes
back and forth.
If P is set low you will get no motion; as you increase P the axis
should get more and more jittery. Finally it should sustain back and
forth motion. Don't do this too long; just long enough to make
certain it is not going to dampen out. Then multiply the P that
produced that by 0.6 and that is a starting value for P. When you
are doing this I and D are both set to zero.
After that works then go adjust FF1. That is my way of doing things.
Others have different procedures and they work also.
>
>
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