Table of Contents
Advertisement
Direct Drive Motor Specifications and Instruction Manual
7 Setup
【#2263】 SV063 DA1MPY D/A output ch1 output scale / Initial DC excitation time
Set output scale of the D/A output channel 1 in increment of 1/100.
When "0" is set, the magnification is the same as when "100" is set.
When the DC excitation is running (SV034/bit4=1):
Use this when the DC excitation is running (SV034/bit4=1) to adjust the initial setup (when
measuring the magnetic pole shift amount) for direct-drive motor.
Set the initial excitation time in DC excitation control.
Set 1000ms as standard.
Related parameters: SV034/bit4,SV061, SV062
---Setting range---
-32768 to 32767 (1/100-fold)
7.3 Initial Setup for Direct-drive Motor System When Using MBA405W
This section explains the initial setup procedures when using MBA405W.
CAUTION
1. Perform the initial setup after the operation is enabled for NC system.
2. The initial setup is required for each direct-drive motor.
3. Perform the initial setup again after replacing the encoder.
4. For the initial setup, the main head of MBA405W is required to detect Z-phase signal (Z-phase signal position mark
needs to pass the main head). If the structure does not allow the magnetic drum to turn move than one revolution,
reinstall it so that Z-phase passes the main head within the shaft stroke.
7.3.1 Adjustment Procedure
Although MBA405W is an absolute position encoder, it needs to pass Z-phase at the initial power ON before the initial
setup (DC excitation) is carried out.
Therefore, when using it with a direct-drive motor, drive the motor until the encoder passes the Z-phase by initial
magnetic pole estimate. After the Z-phase has been passed, turn the NC power ON again to decide the absolute position
within one revolution.
After deciding the absolute position, execute the DC excitation function in the same manner as for the other absolute
encoders to decide the magnetic pole shift amount.
<Initial magnetic pole estimate function>
(1) Set the incremental control (#2049 type to 0).
(2) Set the parameters related to the initial magnetic pole estimate function (#2321(SV121) to 33, #2322(SV122) to
Standard VGN1, and #2323(SV123) to 1364).
->
Standard VGN1 is set depending on the load inertia scale for #2322(SV122). (Refer to "8.1.1 Speed loop
gain".)
(3) Turn the NC power ON again.
->
Confirm that the warning during initial setup for the absolute position (A3) occurs.
->
Select the [Servo diagn] and [Servo unit] menus on the NC maintenance screen, and confirm that [Motor end
encoder] displays "MB*405W".
(4) Release the emergency stop.
(5) The LED on the drive unit changes to "Cx" and the direct-drive motor moves by little and little for about five seconds
(start initial magnetic pole estimate).
(6) Confirm that the LED on the drive unit changes to "dx" and the motor stops (terminate initial magnetic pole
estimate).
When the DC excitation is running (SV034/bit4=1): 0 to 10000 (ms)
61
IB-1501068-C
Advertisement
Table of Contents
