Very High Load Actuators, Closed-Loop Piezo Actuator, P-242/P-246

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High Force Piezo Actuators
Displacement to 120µm
Pushing Forces to 12500N (2750lbs)
Pulling Forces to 2000N
Sub-msec Response
Sub-nm Resolution
Options: UHV, Low & High Temperature, Water Protected

These very high load linear actuators are driven by a high-performance piezo stack and can handle loads to 2750 lbs. (1250kg) while providing nanometer precision motion. The linear actuators can be used in both dynamic and static mode. They provide sub-millisecond response and sub-nanometer resolution. The high load capacity and internal spring preload makes them ideal for machining applications and vibration cancellation.

Standard high load actuators can be run in open loop mode, providing very high resolution. When the highest repeatability, absolute accuracy, and precision are required, the P-177.10 closed-loop control option with ultra-high resolution strain gauges for position feedback operation with high performance PI servo controller electronics is recommended.

P-246 linear actuator models are equipped with special ceramic layers, providing more displacement in the same package compared to the than P-242 piezo stack models. On the other hand, their maximum operating voltage is limited to -1000 V with voltages in excess of -750 V recommended only for short periods of time.

The P-246.xx, P-242.30, and P-242.40 actuators are protected by a stainless steel case with internal spring preload, to keep pulling forces from the Piezo stack. The linear actuators P-242.10 and P-242.20 are encased with an aluminum case and equipped with stainless steel end pieces and spring bolts providing the preload.

Application examples:
Out-of-round machining, laser optics turning, precision machining, adaptive mechanics, vibration cancellation, smart structures, static and dynamic positioning of heavy parts, force generation for bending or compressing of material, etc.

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-706.xx Water Protected Case (not for P-242.10 and P-242.20)

¹) When ordering the following options, change the last digit to 7, e.g. P-242.10 to P-242.17, and list options separately.

TECHNICAL DATA: P-242, P-246
Models *	P-242.10	P-242.20	P-242.30	P-242.40	P-246.20	P-246.30	P-246.50	P-246.70	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	1100	600	320	215	1050	560	295	200	N/µm ± 20 %	D1
Force generation (blocked)	11000	12000	13000	13000	21000	22000	24000	24000	N ± 20 %	D2
Push/pull force capacity	12500 / 2000	12500 / 2000	12500 / 2000	12500 / 2000	12500 / 2000	12500 / 2000	12500 / 2000	12500 / 2000	N	D3
Torque limit (at tip)	1000	1000	1000	1000	1000	1000	1000	1000	mNm	D6
Max. operating voltage	-1500	-1500	-1500	-1500	-1000	-1000	-1000	-1000	V	A7
Electrical capacitance	180	360	666	900	613	1150	2200	3280	nF ± 20 %	F1
Dynamic operating current coefficient (DOCC)	22	22	22	22	38	38	38	38	µA/(Hz x µm)	F2
Unloaded resonant frequency (f₀)	11	8	4.5	3.5	8	6.5	4	3	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	280	360	720	830	540	600	720	830	g ± 5 %	K
Material case / end pieces	AL / N-S	Al / N-S	N-S	N-S	N-S	N-S	N-S	N-S		L1
Length L	41	62	114	141,5	53.5	70.5	114	141.5	mm ± 0.5	L2
Case type	A	A	B	B	B	B	B	B		L3
Recommended Amplifier/Controller	B, J	B, J	B, J	B, J	B, J	B, J	B, J	B, J		M