Stepper motor selection WP1000

WP1000/1100 Stepper Motor & Gear

Geared motor Specification

Scroll Table

Geared motor code	FB	BA	GA	GD
Configuration	Hybrid stepper motor & 1: 64 Gear ratio	Hybrid stepper motor & 1: 8 Gear ratio	Hybrid stepper motor & 1:8 Gear ratio	Hybrid stepper motor & 1:42 Gear ratio
Number of phases and motor type	2 phase / BI polar system		2 phase / UNI polar system
Rated voltage	1.92V	1.76V	3.5V
Rated current	0.8A / Phase	1.1A / Phase	1.2A / Phase
Step angle	0.0141°(Half step)	0.1125°(Half step)	0.1125°(Half step)	0.0216°(Half step)
RPM	0 to 20rpm	20 to 150rpm		0 to 29rpm
Duty ratio	Max. 50%
Winding resistance	2.4Ω±10%	1.6Ω±10%	2.9Ω±10%
Inductance	2.5mH	2.6mH	4.0mH
Motor Insulation class	B
Motor rated temperature	less than 80℃ (176℉)
Motor life *1	5,000hr

*1 The life of motor is based on laboratory test at WELCO and not gurateed value.

<1-2P Drive　Method>

Scroll Table

F-Low(Initial speed)	500Hz(pps)
F-Hight(Operetion speed)	over 1000Hz (pps) use Max: 8000Hz (pps)
Acceleration/Deceleration Time	The given value from 0.1 to 0.5s or 1.0s (When the Pump load is high, set the acceleratioin time longer.)
Operetion current	Any value below the Maximum rating. FB motor: 0.8A BA motor: 1.1A GA,GD motor: 1.2A
Rating rotation	FB motor with 1: 64gear 【0～20rpm ⇒　0～8533Hz(1-2P)】 BA,GA motor with 1: 8gear 【20～150rpm ⇒　1066～8000Hz(1-2P)】 GD motor with 1: 42gear 【0～29rpm ⇒　0～8533Hz(1-2P)】

Stepper Motor & Gear WP1000/1100

The characteristic of our Peristerltic Pump products is an initial hight torque value. It's about 2 or 3 times higher compared
to the torque required to maintain a constant velocity once the tube has conformed to the shape of the roller.
When you have a step-motor driven by a high freqency, it is necessary to apply the frequency described in above.
In deceleration, the frequency can be reduced gradually as well as in acceletion or within being cut off suddenly.

One point advice
If Pump load is high and rotor does not work, please try to apply 10-20% higher current than rated current of motor during the acceleration of trapezoidal drive above.
Once Pump reaches at the constant speed, please set it back to the rated current.

Flow amount benchmark (flow amount per rotation)

Scroll Table

Inner diameter	1.6mm (1/16”)		2.4mm (3/32”)		3.2mm (1/8”)		4mm ( - )		4.8mm (3/16”)		6.4mm (1/4”)
Number of rollers/code	2	4	2	4	2	4	2	4	2	4	2	-
Flow amount per rotation (ml)	-	0.2	0.5	0.45	0.9	0.8	1.45	1.2	1.95	1.6	3.0	-

Caution: Tube type F3/16”, EL1/8", EL3/16” and U3/16” cannot be used with four rollers due to its high hardness.
1. The flow amount rotation is based on laboratory test at WELCO. This may vary depending on operating environment, lot tolerances, and other factors. Please veryfiy performance under actual operation conditions.
2. The reference flow rate of the pump is determined by the product of flow amount per rotation and motor speed.