B-421 BIX Miniature Linear Stage

Positioners for Small Dimensions, High Resolution, and a Favorable Price

Up to 45 mm long and 11 mm high, 13 mm to 33 mm travel range
Direct position measurement with incremental encoder with up to 6 nm resolution
Minimum incremental motion of 10 nm
Maximum drive force of 2.5 N
Easily stackable for multi-axis combinations

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B-421.x31, dimensions in mm

The B-421 is a miniature linear stage with piezoelectric inertia drive intended for positioning, aligning, and shifting loads in a single axis at different velocities in interval mode.

Applications and use cases

Superresolution microscopy (e.g., TIRF, STORM)
Light sheet microscopy (e.g., grid light sheet)
Micro-assembly
Photonics
Optical alignment
Beamline instrumentation
Semiconductor technology
Mobile metrology devices (e.g., spectroscopy, interferometry)

Technology

The B-421 is equipped with a piezoelectric inertia drive that is based on biphase inertia drive technology. Piezo inertia drives are space-saving and affordable piezo-based drives with relatively high holding forces and a virtually unlimited travel range. The inertia drive principle is based on two piezoelectric actuators that are controlled with a modified sawtooth voltage via the drive electronics. The actuators expand slowly and move a runner. Due to its inertia, the runner is unable to follow the subsequent fast contraction of the actuators and remains in its position. A symmetrical motor setup guarantees consistent drive characteristics in positive and negative directions of motion. The drives acting directly on the runner achieve velocities of up to 14 mm/s with an operating frequency of up to 20 kHz.

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データシート

日付 / バージョン

2026-08-26

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2026-08-26

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日付 / バージョン

2026-08-26

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Motion	Unit	Tolerance	B-421.131	B-421.231	B-421.331
Active axes			X	X	X
Travel range	mm		13	23	33
Maximum velocity, unloaded	mm/s	typ.	14	14	14
Linearity	µm	typ.	2.5	2.5	2.5
Angular error around Y (pitch)	µrad	typ.	±350	±105	±80
Angular error around Z (yaw)	µrad	typ.	±375	±400	±475

Positioning	Unit	Tolerance	B-421.131	B-421.231	B-421.331
Minimum incremental motion	µm	typ.	0.01	0.01	0.01
Unidirectional repeatability*	µm	typ.	±0.25	±0.25	±0.25
Reference switch			Optical, direction sensing (reference edge track), 5 V, TTL	Optical, direction sensing (reference edge track), 5 V, TTL	Optical, direction sensing (reference edge track), 5 V, TTL
Integrated sensor			Incremental linear encoder	Incremental linear encoder	Incremental linear encoder
Sensor signal			Sin/cos, 1 V peak-to-peak	Sin/cos, 1 V peak-to-peak	Sin/cos, 1 V peak-to-peak
Sensor signal period	µm		20	20	20
Sensor resolution	nm		6	6	6

Drive properties	Unit	Tolerance	B-421.131	B-421.231	B-421.331
Drive type			BIX biphase inertia drive	BIX biphase inertia drive	BIX biphase inertia drive
Nominal current, RMS	A	typ.	0.05	0.05	0.05
Peak current, RMS	A	typ.	0.3	0.3	0.3
Peak current, time limit	s		10	10	10
Drive force in X	N	typ.	2.5	2.5	2.5

Mechanical properties	Unit	Tolerance	B-421.131	B-421.231	B-421.331
Holding force (passive)	N	min.	3	3	3
Maximum load capacity, base plate horizontal	kg	typ.	0.5	0.5	0.5
Maximum load capacity, base plate any orientation	kg	typ.	0.15	0.15	0.15
Guide			Ball guide	Ball guide	Ball guide
Overall mass	g		130	140	150
Mass without cable	g		35	45	55
Material			Stainless steel	Stainless steel	Stainless steel

Miscellaneous	Unit	B-421.131	B-421.231	B-421.331
Operating temperature range	°C	0 to 40	0 to 40	0 to 40
Connector		D-sub 15 (m)	D-sub 15 (m)	D-sub 15 (m)
Cable length	m	1.5	1.5	1.5
Minimum bending radius cable	mm	40	40	40
Recommended controllers/drivers		E-881.1X1R	E-881.1X1R	E-881.1X1R

* Average value

At PI, technical data is specified at 22 ±3 °C. Unless otherwise stated, the values are for unloaded conditions. Some properties are interdependent. The designation "typ." indicates a statistical average for a property; it does not indicate a guaranteed value for every product supplied. During the final inspection of a product, only selected properties are analyzed, not all. Please note that some product characteristics may deteriorate with increasing operating time.

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日付 / バージョン

2026-08-26

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2026-08-26

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2026-08-26

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ドキュメント

日付 / バージョン

2026-05-20

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日付 / バージョン

2026-05-20

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３D モデル

zip - 8 MB

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Ask for a free quote on quantities required, prices, and lead times or describe your desired modification.

B-421.131 新製品!

BIX miniature linear stage; piezoelectric inertia drive, 13 mm travel range, linear encoder, 6 nm resolution, 2.5 N drive force; dimensions 25 × 29 × 11 mm (L × W × H)

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B-421.231 新製品!

BIX miniature linear stage; piezoelectric inertia drive, 23 mm travel range, linear encoder, 6 nm resolution, 2.5 N drive force; dimensions 35 × 29 × 11 mm (L × W × H)

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B-421.331 新製品!

BIX miniature linear stage; piezoelectric inertia drive, 33 mm travel range, linear encoder, 6 nm resolution, 2.5 N drive force; dimensions 45 × 29 × 11 mm (L × W × H)

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B-421.AP1

Adapter plate for XY mounting of B-421 linear stages; stainless steel; including mounting kit

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B-421.APZ

Mounting bracket for XZ mounting of B-421 linear stages; stainless steel; including mounting kit

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