DC Stepper Motor

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Iec Frame Sizes58 mm, 86 mm & 108 mm
PhaseTwo phase pair (four phase)
Dielectric Strength500V A.C. for 1 Minute
Swithching Sequence 4 step (Full step); 8 step (Half step)
Supply TypeManufacturer, Exporter, Supplier, Retailer
Preferred Buyer Location All over the world

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Vishal Electromag Industries

Mahad, Mumbai, Maharashtra

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Member Since 24 Years
Nature of Business Retailer
Year of Establishment 1981

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PhaseTwo phase pair (four phase)
Dielectric Strength500V A.C. for 1 Minute
Iec Frame Sizes58 mm, 86 mm & 108 mm
Type Hybrid Type; Unipolar or Bipolar
Angular Accuracy ± 5% non-cumulative (No load)
Insulation Resistance 100 MΩ min. at 500 V.D.C.
Temp Rise Max 80° C
Insulation Class Class B
Step Angles 1.8° full step; 0.9° half step
Holding Torque 2 to 60 kg-cm in 12 models
Operating Temp -10° C to 50° C
Swithching Sequence 4 step (Full step); 8 step (Half step)
Stator winding Bifiliar, 6 leads or optional 8 leads

Stepping motor is an electromagnetic device which converts digital pulses into discrete mechanical rotational movements. The motors are hybrid type unipolar or bipolar having multi- toothed rotor & stator. The rotor uses permanent magnet & the stator is two phase pair (four phase) bifilar winding, with 6 leads or 8 leads.

STEPPING MOTOR WORKING :

The stepping action of motor shaft is caused by sequential switching of supply to the two phase pair of motor as shown in full step & half step logic sequence table. Motor direction can be changed either by reversing logic sequence direction or by interchanging connection of any one phase pair.


	SPECIAL FEATURES :

A wide range of rotating speeds (stepping rate) proportional to the frequency of the pulse signal is

provided.

The rotating angle of the motor is directly proportional to the number of input pulses.

The angle error per step is very small & non-cumulative.

Rapid response to starting / stopping & reversing.

Digital input pulse signal provide open-loop control, thus making the system simple & avoiding the need

for closed loop system for less critical application.

Self-holding capability makes it possible for the rotor to be held in the stepped position without the use

of brakes.

TERMINOLOGY :


	1)	Torque-Speed curve



	2)	Holding Torque : It is the maximum torque require to change the step angle, When the stator winding
		is in exciting state at the rated voltage.

	3)	Detent Torque : Torque created on the output shaft of a motor, when stator is in no exciting state &
		whose rotor uses permanent magnet.

	4)	Step Angle : The nominal angle through which the shaft of a stepping motor turns in response to one
		pulse signal.

	5)	Start-Stop Region : The region, in which a stepping motor can start, stop or reverse in synchronism
		with the external pulse signal.

	6)	Slew Range : In the region above the start-stop region, a stepping motor can respond without loss of
		synchronism, even when there is a gradual increase in the frequency or the torque load within this
		region.

	7)	Pull-in Torque : The max. torque at which an energized stepping motor will start and run in
		synchronism in the start-stop region.

	8)	Pull-out Torque : The max. torque which can be applied to the shaft of a stepping motor without loss
		of synchronism, even when there is a gradual increase in frequency or load torque within the slew
		range.

	9)	Resonance : When a motor is operated at its natural frequency, typically 90 to 180 pps or sometimes
		in the higher frequency region, suddenly an increase in the audio and vibration depending on motor
		model selected. In some cases motor will reverse or miss-step also.

	10)	Acceleration and Deceleration (Ramping ) : In most cases, a stepping motor cannot achieve high
		speeds immediately when started and will overshoot if not decelerated from these speeds. Therefore,
		acceleration and deceleration, or "ramping" as it is commonly known, must be provided to assure
		realiable stepping and maintain positioning accuracy in the slew range region.

Motor Model	Holding Torque		Detent Torque Kg-cm	Rotor Inertia Gm-cm²	Current Amp./ Phase			O.D.mm	Lengthmm	Weight (app.) kg.
	Holding Torque				D.C. Voltage
	1-Phase energised Kg-cm	2-Phase energised Kg-cm			6V	12V	24V
STM-231SP	2	2.8	0.100	120	1.00	0.50	0.25	58	60	0.600
STM-232	4	5.6	0.250	230	1.50	0.70	0.35	58	80	1.100
STM-233	6	8.4	0.400	320	1.80	0.9	0.45	58	105	1.500
STM-341	3.5	5.0	0.400	610	1.35	0.68	0.35	86	68	1.400
STM-341SP	7	9.9	0.450	650	1.40	0.70	0.40	86	68	1.500
STM-342	14	19.7	0.700	1280	2.50	1.20	0.60	86	120	3.100
STM-343	21	29.8	0.800	1890	3.50	1.80	0.90	86	150	4.000
STM-421	10	14.0	1.000	3200	3.30	1.50	0.65	108	80	3.100
STM-421SP	20	28.0	1.600	3800	3.30	1.50	0.65	108	80	3.400
STM-422SP	28	36.0	1.800	4000	3.30	1.50	0.67	108	85	3.700
STM-422	40	56.0	3.100	7000	4.50	2.25	1.30	108	155	6.300
STM-423	60	84.0	4.800	10800	6.00	3.00	----	108	215	10.500

Stepping Motor Model	Torque Kg-cm	Dimensions (mm)										Weight Kg
Stepping Motor Model	Torque Kg-cm	A	B	C	D	E	F	G	ØH	ØJ	Øk	Weight Kg
STM-231SP	2	58	47.2	60	6	1.2	22	21	6.35	38	5	0.600
STM-232	4	58	47.2	80	6	1.2	22	21	6.35	38	5	1.000
STM-233	6	58	47.2	105	6	1.2	22	21	6.35	38	5	1.400
STM-341	3.5	86	70	68	7	1.2	27	21	10	73	7	1.400
STM-341SP	7	86	70	68	7	1.2	27	21	10	73	7	1.500
STM-342	14	86	70	120	7	1.2	27	21	10	73	7	3.100
STM-343	21	86	70	150	7	1.2	27	21	10	73	7	4.000
STM-421	10	108	85	80	7	1.5	27	22	10	55	8	3.000
STM-421SP	20	108	85	80	7	1.5	27	22	10	55	8	3.400
STM-422SP	28	108	85	135	7	1.5	27	22	10	55	8	4.200
STM-422	40	108	85	155	7	1.5	50	22	15	55	8	6.300
STM-423	60	108	85	215	7	1.5	50	22	15	55	8	10.100