Ultra-High-Load Actuators, Closed-Loop Actuators, P-243/P-247

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Displacement to 120µm
Pushing Forces to 30000N (6,600 lbs)
Pulling Forces to 3500N
Extremely High Stiffness
Options: UHV, Low & High Temperature, Water Protected

P-243 and P-247 are extreme high load linear actuators capable to handle forces up to 6,600lbs (3tons). These closed-loop actuators (optional) are ideal for high precision motion applications with nanometer resolution, where fast response is required. However, they can also be used in static mode. These piezo actuators have the advantage of holding a very high load without the need for electric power (piezo effect) and they can provide-millisecond response and sub-nanometer precision. The high load capacity and high force internal spring preload makes them ideal for machining applications and vibration cancellation.

Standard PZT actuator models can be operated in open-loop (more economical) and still provide very high resolution. The Closed-Loop actuator models (P-177.10 option) additionally provide very high accuracy and repeatability by means of an integrated strain gauge position feedback sensor for real time closed loop control with a high-performance PI servo controller electronics.

The P-247 linear actuator models are equipped with thinner piezo layers for more stroke compared to the P-243 actuator 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-247.xx, P-243.30 and P-243.40 actuator models are encased in a stainless steel case with internal spring preload protecting the piezo stack from external pulling forces. The shorter actuator Models P-243.10 and P-243.20 come with an aluminum case, stainless steel end pieces, and spring bolts providing the preload.

Application examples:
Diamond turning, laser machining, active optics, 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-243.10 and P-243.20)

¹) When ordering the following options, change the last digit to 7, e.g. P-243.10 to P-243.17, and list options separately.

TECHNICAL DATA: P-243, P-247
Models *	P-243.10	P-243.20	P-243.30	P-243.40	P-247.20	P-247.30	P-247.50	P-247.70	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	2130	1160	625	420	2100	1120	590	400	N/µm ± 20 %	D1
Force generation (blocked)	21000	23000	25000	25000	42000	45000	47000	48000	N ± 20 %	D2
Push/pull force capacity	30 / 2	30 / 2	30 / 2	30 / 2	30 / 3.5	30 / 3.5	30 / 3.5	30 / 3.5	kN	D3
Torque limit (at tip)	2000	2000	2000	2000	2000	2000	2000	2000	mNm	D6
Max. operating voltage	-1500	-1500	-1500	-1500	-1000	-1000	-1000	-1000	V	A7
Electrical capacitance	360	720	1330	1800	1220	2300	4400	6560	nF ± 20 %	F1
Dynamic operating current coefficient (DOCC)	45	45	45	45	76	76	76	76	µA/ (Hz x µm)	F2
Unloaded resonant frequency (f₀)	11	8	5	3.5	8	6.5	4.5	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	460	630	850	960	580	660	830	960	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	41.5	63	116.5	144	56	73	116.5	144	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