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Address: Building A2,Hutang Industrial zone,Lingdao Rd,Wujin District,Changzhou,China.Zip:213162
Contact name:Annie
CHANGZHOU JKONGMOTOR CO.,LTD |
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Nema 34 Closed Loop Stepper Motor Systerm High Torque 4.5N.M Easy
Servo Motor For Milling Machine
Stepper motors have a number of positive attributes. Because they
generate incremental motion, they are generally run open-loop,
eliminating the cost and complexity of an encoder or resolver. The
high pole count allows them to generate very high torque at zero
speed. They are compact and generally economical .
Genaral Specification of closed loop stepper motor:
| Item | Specifications |
| Step Angle | 1.8° |
| Temperature Rise | 80℃max |
| Ambient Temperature | -20℃~+50℃ |
| Insulation Resistance | 100 MΩ Min. ,500VDC |
| Dielectric Strength | 820VAC for 1minute |
| Shaft Radial Play | 0.02Max. (450g-load) |
| Shaft Axial Play | 0.08Max. (450g-load) |
| Max. radial force | 220N (20mm from the flange) |
| Max. axial force | 60N |
Electrical Specification of nema 34 closed loop stepper motor 4.5N.m:
Model No. | Step Angle | Motor Length | Current /Phase | Resistance /Phase | Inductance /Phase | Holding Torque | # of Leads | Detent Torque | Rotor Inertia | Mass |
| ( °) | (L)mm | A | Ω | mH | N.m | No. | Kg.cm | g.cm | Kg | |
| JK86HS78-6004 XBJED-0.35M | 1.8 | 78 | 6 | 0.27 | 2 | 4.5 | 4 | 1.2 | 1400 | 2.8 |
closed loop Stepper motor Driver: JK-HSD86
| Parameter | Min | Typical | Max | Unit | |
| Input Voltage (JK-HSD86) | 20 | 36 48 | 50 | VDC | |
| Input Voltage (JK-HSD86C) | 24 | 36 48 | 80 | VDC | |
| Input Voltage (SC8680C) | 24VAC | 60AC | 80VAC 100VDC | VVDC | |
| Output Current | 0.1 | - | 10(Peak) | A | |
| Pulse Input Frequency | 0 | - | 200 | kHz | |
| Logic Signal Current | 7 | 10 | 16 | mA | |
| Isolation Resistance | 500 | - | - | MΩ | |
Details of product:
One set includes stepper motor and stepper driver with 3m cables
Servo Motors
Like stepper motors, servo motors have many implementations. Let’s
consider the most common design, which incorporates a rotor with
permanent magnets and a stationary stator with the windings. Here
too, the current creates a magnetic field distribution that acts on
the rotor to develop torque. Servo motors have significantly lower
pole counts than stepper motors, however. As a result, they must be
run closed-loop.
In general, servo motors are more sophisticated than stepper
motors. They run significantly faster than stepper motors, with
speeds on the order of several thousand RPMs. This enables servo
motors to be used with gearboxes to deliver much higher torque at
useful speeds. They also deliver more consistent torque across the
speed range of the motor. Unlike stepper motors, they do not have
holding torque per se.
Closed-loop operation enables the controller/drive to command that
the load remain at a specific position, however, and the motor will
make continual adjustments to hold it there. Thus, servo motors can
deliver de facto holding torque. Note, however, the zero-speed
torque scenario depends upon the motor being sized properly to
control the load and prevent oscillation about the commanded
location.
With closed-loop feedback, servo motors deliver high accuracy
positioning coupled with better speed and acceleration than stepper
motors. The trade-off is increased cost, size, and complexity.
Servo motors typically use rare-earth magnets while stepper motors
more frequently use less expensive conventional magnets. Rare-earth
magnets enable the development of higher torque in a smaller
package. Servo motors also gain a torque advantage from their
overall physical size. Servo motor diameters typically range from
NEMA 17 all the way up to 220 mm. As a result of these combined
factors, servo motors can deliver torques of up to 250 foot-pounds.
The combination of speed and torque enables servo motors to deliver
better acceleration than stepper motors. They also deliver improved
positioning accuracy as a result of closed-loop operation.
