Closed-Loop Piezo Actuators, Preloaded PZT

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Displacement to 120 µm
Pushing Forces to 2000 N
Pulling Forces to 300 N
Sub-msec Response
Sub-Nanometer Resolution
Options: UHV, Low & High Temperature

P-244 and P-245 Preloaded PZT Linear Actuators are high resolution precision actuators with closed-loop option for static and dynamic applications. They provide sub-millisecond response and sub-nanometer resolution. The internal spring preload makes them ideal for machining applications.

Standard models are specifically designed for open loop operation. For highest accuracy, select the P-177.10 closed loop option feedback control integrating ultra-high resolution strain gage position sensors for operation with PI servo control electronics (click here for details on Position Sensors and Closed Loop Operation).

P-245 models are equipped with different piezo ceramic wafers, providing more displacement than P-244 models in the same package. The piezo stacks are protected from forces by an internally spring preload stainless steel case. The standard translator tip and base have tapped holes. Select the P-244.95 ball tip option to help decouple off-axis or torque loads from the translator tip. For push/pull forces up to 5 N, the piezo translator can be mounted by clamping around the case. For larger forces, the translator must be mounted by the base.
For positioning of magnetic parts, the P-176.10 Magnetic Adapter can be screwed into the translator tip.

Application examples:
Static and dynamic positioning, optics, metrology, smart structures, precision machining, adaptive mechanics, vibration cancellation, switching, laser tuning, patch clamping, etc.

Accessories:
P-176.10 magnetic adapter with M5 threaded stud

Extension cables & connectors.

Factory Installed Options:¹)
P-177.10 Closed Loop Option

P-702.10 High Temperature Option

P-702.20 Low Temperature Option

P-703.20 High Vacuum Option

P-705.00 Positive Polarity

P-244.95 Ball Tip

¹) When ordering the following options, change the last digit to 7, e.g. P-244.10 to P-244.17, and list options separately.

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-244, P-245
Models *	P-244.10	P-244.20	P-244.30	P-244.40	P-245.20	P-245.30	P-245.50	P-245.70	Units	Notes
Open loop travel @ 0 to -1000 V	10	20	40	60	20	40	80	120	µm ± 20 %	A4
* Closed loop travel ³	10	20	40	60	20	40	80	120	µm	A5
* Integrated feedback sensor	SGS	SGS	SGS	SGS	SGS	SGS	SGS	SGS		B
* Closed / open loop ** resolution	0.2 / 0.1	0.4 / 0.2	0.8 / 0.4	1.2 / 0.6	0.4 / 0.2	0.8 / 0.4	1.6 / 0.8	2.4 / 1.2	nm	C4
Stiffness	180	98	53	29	170	91	48	32	N/µm ± 20 %	D1
Force generation (blocked)	1800	2000	2100	1800	3400	3600	3800	3800	N ± 20 %	D2
Push/pull force capacity	2000 / 300	2000 / 300	2000 / 300	2000 / 300	2000 / 300	2000 / 300	2000 / 300	2000 / 300	N	D3
Torque limit (at tip)	500	500	500	500	500	500	500	500	mNm	D6
Max. operating voltage	-1500	-1500	-1500	-1500	-1000	-1000	-1000	-1000	V	A7
Electrical capacitance	25	47	89	133	95	180	340	500	nF ± 20 %	F1
Dynamic operating current coefficient (DOCC)	3	3	3	3	6	6	6	6	µA/ (Hz x µm)	F2
Unloaded resonant frequency (f₀)	16	12	9	5.5	15	11	8	5	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	L	L		J2
Weight without cables	59	72	102	136	59	72	102	136	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	45	61.5	93.5	127	45	61.5	93.5	127	mm ± 0.5
Recommended Amplifier/Controller	B, I, J	B, I, J	B, I, J	B, I, J	B, I, J	B, I, J	B, I, J	B, I, J		M