Introduction of E-Cam Operation ASDA Series Application Note
2-48 March, 2015
2.9 Troubleshooting when E-Cam is not working properly
If E-Cam is not working properly, the following methods can be used to troubleshoot.
1. Make sure source of the master axis is correct; this can be done by checking the setting of
P5-88.Y that specifies the source of the master axis. When input terminal is CN1, make
sure value of P5-18 is increasing; when input terminal is CN5, make sure value of P5-17 is
increasing. Please note that this method is only applicable to the external input. When
applying E-Cam function, it is suggested to use signal input externally as the source of the
master axis; virtual signal which generates from the servo drive is for testing purpose only.
2. When E-Cam is enabled (P5-88.X = 1), count of pulse number from the master axis can be
accessed by P5-86. Its value must be an increasing value, if not, please reverse the pulse
direction (not the motor’s operating direction). Value of P5-86 has to be an increasing value;
otherwise, E-Cam axis will not be able to operate based on the E-Cam curve.
3. Check the E-Cam curve scaling. Check the setting of P5-19 to see if the scale is
appropriate. If the scale is too small, the motor operation will be too subtle to be seen even
when E-Cam is working. PC scope can be used to check if the motor is operating subtlety.
4. Check if data of the E-Cam curve is properly stored in data array. Data Array Editor can be
used to check if the values are stored.
5. Make sure P5-81 specifies a correct start address in data array. If P5-81 is specifying a
wrong address, a desirable E-Cam curve cannot be created. Make sure the setting of
P5-82 is correct; the total number of points of E-Cam is value of P5-82+1. If incorrect, the
system is unable to carry out the setting of every point on E-Cam curve.
6. Access the value of P5-88.S to acquire the clutch status. In Status 1, E-Cam is engaged
and slave axis operates according to the pulses received from the master axis. In Status 0
or 2, slave axis is still.
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