Point Deviates Positioning Accuracy is Poor

			[When in Trouble]
Point Deviates		Positioning Accuracy is Poor

Classification		Causes	Countermeasures

Parameter	The setting of the parameter for positioning		Adjust the target position parameter at each point.
	operation is wrong.		Check the setting of an operation mode (relative travel/absolute travel).
	The setting of positioning completion range is		Decrease the set value of the positioning completion range (SV.Pr60)
	large.		to the extent that chattering does not occur.
	Position loop gain is small.		Check the position deviation in the monitor mode of the console or
			“PANATERM®”.
			Increase the set value of SV.Pr10 to the extent that oscillation does not
			occur and check it.
Wiring	Each input signal of CN X5 is chattering.		Check the wiring and connection between each signal of the connector
	1)Servo-ON signal		CN X5 and COM–.
	2)CW/CCW over-travel inhibit input
	3)Multi function input 1/2
	(when a stop command is set)
	4)Strobe signal input
	5)Point specifying input
Installation	Load inertia is large.		Check the overshoot when stopping with a graphic function of
			“PANATERM®”. If this problem is not resolved by gain adjustment,
			increase the motor and driver capacity.

Home Position Slips

Classification	Causes	Countermeasures

Parameter	The homing speed is slow, if any of the homing	Review the set value of the homing speed (16.Pr30/31).
	types below is used.
	16.Pr36 =
	1:Home sensor (based on the front end)
	4: Limit sensor
Wiring	Chattering of home sensor (Z-LS) input.	Check home sensor input signal of the controller with oscilloscope.
		Review the wiring near to proximity dog and make a noise measure or
		reduce noise.
	Noise is on the encoder line.	Reduce noise (installation of noise filter or ferrite core), shield
		treatment of I/F cables, use of a twisted pair or separation of power
		and signal lines.

Classification	Causes	Countermeasures

AdjustmentGain setup is large.		Lower the gain by setting up lower values to SV.Pr11 and 19, of
		velocity loop gain and SV.Pr10 and 18 of position loop gain.
Installation	Resonance of the machine and	Re-adjust SV.Pr14 and 1C (Torque filter). Check if the machine
	the motor.	resonance exists or not with frequency characteristics analyzing
		function of the PANATERM®. Set up the notch frequency to SV.Pr1D
		or SV.Pr28 if resonance exists.
	Motor bearing	Check the noise and vibration near the bearing of the motor while
		running the motor with no load. Replace the motor to check. Request
		for repair.
	Electro-magnetic sound, gear noise, rubbing	Check the noise of the motor while running the motor with no load.
	noise at brake engagement, hub noise or rub-	Replace the motor to check. Request for repair.
	bing noise of encoder

When in Trouble

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