
49
Setting Up Parameters
A user wishes to accelerate from 100% programmed velocity to 175% in 0.5 Seconds. Therefore, the value they need to enter
for Feedrate Decel/Accel is calculated as follows:
Online Tab (not shown)
If online, the following real-time data will be displayed.
Motor Velocity Group
Velocity Command
The Velocity Command is the actual command generated by the device to the motor in user units.
Velocity Feedback
This parameter is the actual feedback motor velocity in user units.
Ramps View
The Ramps View allows the user to define various accel/decel ramps used under typical application conditions. By selecting
Ramps in the Hierarchy Tree, the Ramps View will appear on the right (see Figure 44).
Figure 44: Ramps View
Settings Group
Acceleration Type
The Acceleration Type list box display the various acceleration types: 5/8 S-Curve, 1/4 S-Curve, Linear, and S-Curve.
This is used to select the acceleration/deceleration type for all motion (homes, jogs and indexes). The “S-Curve” ramps offer
the smoothest motion, but lead to higher peak acceleration/deceleration rates. “Linear” ramps have the lowest peak
acceleration/deceleration rates but they are the least smooth ramp type. “5/8 S-Curve” ramps and “1/4 S-Curve” ramps use
smoothing at the beginning and end of the ramp but have constant (linear) acceleration rates in the middle of their profiles.
The “5/8 S-Curve” is less smooth than the “S-Curve” but smoother than the “1/4 S-Curve”.
= 0.5 Seconds
FeedRate Decel/Accel = Decel Time/ % Change in FeedRate
= (0.5 Sec) / (175% - 100%)
=0.5 Sec / 75%
= (0.5 Sec) / (100% * 75%)
= 0.66 Sec / 100%
Kommentare zu diesen Handbüchern