Baldor MN1851 manual Figure A-17 Inertia and Load Response Examples, Tracking factor

Response Move to the “Response” block and place the cursor in the “bandwidth” window, and click on it.

The “bandwidth” is a measure of the range over which the system can respond. It is expressed in frequency or Hertz. This parameter controls the “rise time” of the system. It does not effect overshoot.

It is recommended that bandwidth is increased only if higher dynamic response is required. Increase the bandwidth and observe (go to plotting of move) the “velocity” and “command current”, until current reaches maximum value, then back off to 80%. The range is from 10–200.

The next step, would be to verify that the value you entered, provides for adequate system response. You can check this out, by having the software move the equipment and plot the response. Proceed to “Plotting of Move”.

Figure A-17 Inertia and Load Response Examples

Over–Estimated

	1500
Velocity	1000
	500
	0
	–500
		Time
	Velocity Command / Velocity

Tracking factor

Under–Estimated

	1500
Velocity	1000
	500
	0
	–500
		Time
	Velocity Command / Velocity

Velocity

Good Response

1500

1000

500

0

–500

Time

Velocity Command / Velocity

The tracking factor parameter controls the amount of tracking versus overshoot. The range is 0 to 200. A “tracking factor” of “0” generates no overshoot. A “tracking factor” of 200 results in a PI equivalent control (i.e. with overshoot).

The next step, would be to verify that the values you entered, provides for adequate system response. You can check this out, by having the software move the equipment and plot the response. Proceed to “Plotting of Move”.

Click in the “Tracking” block and enter the desired adjustment value. This adjustment is used for applications that require improved tracking (or following) capability, to improve (or reduce) following error.

MN1851 Manual Tuning A-7