Closed-Loop Piezo Actuators, High Load

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High Force Linear Actuators
Displacement to 180µm
Pushing Forces to 4500N (990lbs)
Pulling Forces to 500N
Sub-msec Response
Sub-nm Resolution
Options: UHV, Low & High Temperature

The high load linear actuator family P-239 is based on a ceramic stack of piezoelectric materials for high performance, ultra-high resolution motion. They can be operated in static and highly dynamic mode, with 990lbs (450kg) load. These actuators provide sub-millisecond response and sub-nanometer resolution. The internal spring preload makes them ideal for high precision machining applications, such as diamond turning, out-of-round turning, etc.

Standard PZT actuator models can be operated in open loop operation and provide nanometer resolution. For highest precision, accuracy, and repeatability, the P-177.10 closed loop feedback sensor option is available, integrating ultra-high resolution strain gage position feedback sensors for operation with PI high performance servo control electronics (click here for details on Position Sensors and Closed Loop Operation).

P-239 high load precision actuator models are equipped with special Piezoelectric ceramic layers, providing displacement up to 180 µm at -1000 V operating voltage. For maximum lifetime, voltages in excess of -750 V are recommended only for short periods of time.

The PZT stack actuator is protected from large pulling forces by a stainless-steel case with internal spring preload. The standard translator tip and base have tapped holes. Select the P-239.95 ball tip option to help decouple off-axis or torque loads from the translator tip. For push/pull forces up to 5 N, the translator can be mounted by clamping around the case. For larger forces, the translator must be mounted by the base.

Application examples:
Static and dynamic positioning, optics, metrology, smart structures, precision machining, adaptive mechanics, vibration cancellation, switching, laser tuning, force generation for bending or compressing of material, etc.

Factory Installed Options:¹)
P-177.10 Closed Loop Control Option, not for P-239.00

P-702.10 High Temperature Option

P-702.20 Low Temperature Option

P-703.20 High Vacuum Option

P-705.00 Positive Polarity

P-239.95 Ball Tip

¹) When ordering the following options, change the last digit to 7, e.g. P-239.00 to P-239.07, and list options separately.

Accessories:
Extension cables & connectors.

See "PZT Control Electronics" section for our comprehensive line of low noise, modular and OEM control electronics for computer and manual control.

TECHNICAL DATA: P-239
Models *	P-239.00	P-239.10	P-239.20	P-239.30	P-239.40	P-239.60	P-239.80	P-239.90	Units	Notes
Open loop travel @ 0 to -1000 V	5	10	20	40	60	100	140	180	µm ± 20 %	A4
* Closed loop travel ³	5	10	20	40	60	100	140	180	µm	A5
* Integrated feedback sensor	-	-	SGS	SGS	SGS	SGS	SGS	SGS		B
* Closed / open loop ** resolution	0.1 / 0.05	0.2 / 0.1	0.4 / 0.2	0.8 / 0.4	1.2 / 0.6	2 / 1	2.8 / 1.4	3.6 / 1.8	nm	C4
Stiffness	1440	800	423	220	150	90	66	52	N/µm ± 20 %	D1
Force generation (blocked)	7000	8000	8400	8800	9000	9000	9200	9300	N ± 20 %	D2
Push/pull force capacity	4500 / 500	4500 / 500	4500 / 500	4500 / 500	4500 / 500	4500 / 500	4500 / 500	4500 / 500	N	D3
Torque limit (at tip)	1000	1000	1000	1000	1000	1000	1000	1000	mNm	D6
Max. operating voltage	-1000	-1000	-1000	-1000	-1000	-1000	-1000	-1000	V	A7
Electrical capacitance	70	120	245	460	660	1150	1550	2100	nF ± 20 %	F1
Dynamic operating current coefficient (DOCC)	17.5	17.5	17.5	17.5	17.5	17.5	17.5	17.5	µA/(Hz x µm)	F2
Unloaded resonant frequency (f₀)	12	10	8	6.5	5.6	4	3	2	kHz ± 20 %	G2
Standard operating temperature range	-40 to +80	-40 to +80	-40 to +80	-40 to +80	-40 to +80	-40 to +80	-40 to +80	-40 to +80	° C	H2
Voltage connection	VH	VH	VH	VH	VH	VH	VH	VH		J1
* Sensor connection	-	-	L	L	L	L	L	L		J2
Weight without cables	85	94	112	148	184	256	328	400	g ± 5 %	K
Material case / end pieces	N-S	N-S	N-S	N-S	N-S	N-S	N-S	N-S		L
Length L	35.5	40	48.5	66.5	83	118.5	151	184	mm ± 0.5
Recommended Amplifier/Controller	B, J	B, J	B, J	B, J	B, J	B, J	B, J	B, J		M