QMOT Motor QSH2818 Manual 28mm QMOT motor family Trinamic Motion Control GmbH & Co. KG Sternstraße 67 D – 20357 Hamburg, Germany http://www.trinamic.
QSH2818 Manual (V1.02 / 13-November-2007) 2 Table of Contents 1 2 3 Features........................................................................................................................................................................... 3 Life support policy....................................................................................................................................................... 4 Mechanical Dimensions.................................................................
QSH2818 Manual (V1.02 / 13-November-2007) 3 1 Features These two phase hybrid stepper motors are optimized for microstepping and give a good fit to the TRINAMIC family of motor controllers and drivers. They are also used in the 28mm PANdrive family. Main characteristics: • NEMA 11 mounting configuration • flange max. 28.0mm * 28.0mm • 5mm axis diameter, 20mm axis length • step angle: 1.
QSH2818 Manual (V1.02 / 13-November-2007) 2 Life support policy TRINAMIC Motion Control GmbH & Co. KG does not authorize or warrant any of its products for use in life support systems, without the specific written consent of TRINAMIC Motion Control GmbH & Co. KG. Life support systems are equipment intended to support or sustain life, and whose failure to perform, when properly used in accordance with instructions provided, can be reasonably expected to result in personal injury or death.
QSH2818 Manual (V1.02 / 13-November-2007) 5 3 Mechanical Dimensions Leadwire Configuration Cable type 1 Gauge Coil Black UL1007 AWG26 A Green UL1007 AWG26 ARed UL1007 AWG26 B Blue UL1007 AWG26 B- Function Motor coil Motor coil Motor coil Motor coil black A A B B pin pin pin pin 1 2 1 2 A green M B 3.1 blue red Table 3.1: Leadwire configuration Figure 3.1: Leadwire configuration 3.2 Dimensions LMAX Figure 3.
QSH2818 Manual (V1.02 / 13-November-2007) 6 4 Torque figures The torque figures detail motor torque characteristics for half and full step. For half and full step operation there are always a number of resonance points (with less torque) which are not depicted. These will be minimized by microstep operation in most applications. 4.1 Motor QSH2818-32-07-006 Testing conditions: VM: 24V 0.67A /Phase Driver, SMD 103 Figure 4.1: QSH2818-32-07-006 Speed vs. Torque Characteristics 4.
QSH2818 Manual (V1.02 / 13-November-2007) 7 5 Considerations for Operation The following chapters try to help you to correctly set the key operation parameters in order to get a stable system. 5.1 Choosing the best fitting Motor for an Application For an optimum solution it is important to fit the motor to the application and to choose the best mode of operation. The key parameters are desired motor torque and velocity.
QSH2818 Manual (V1.02 / 13-November-2007) 5.2 8 Motor Current Setting Basically, the motor torque is proportional to the motor current, as long as the current stays at a reasonable level. At the same time, the power consumption of the motor (and driver) is proportional to the square of the motor current. Optimally, the motor should be chosen to bring the required performance at the rated motor current.
QSH2818 Manual (V1.02 / 13-November-2007) 5.3 9 Motor Driver Supply Voltage The driver supply voltage in many applications can not be chosen freely, because other components have a fixed supply voltage of e.g. 24V DC. If you have to possibility to choose the driver supply voltage, please refer to the driver data sheet, and consider that a higher voltage means a higher torque at higher velocity. The motor torque diagrams are measured for a given supply voltage.
QSH2818 Manual (V1.02 / 13-November-2007) 5.4 10 Back EMF (BEMF) Within SI units, the numeric value of the BEMF constant has the same numeric value as the numeric value of the torque constant. For example, a motor with a torque constant of 1 Nm/A would have a BEMF constant of 1V/rad/s. Turning such a motor with 1 rps (1 rps = 1 revolution per second = 6.28 rad/s) generates a BEMF voltage of 6.28V.
QSH2818 Manual (V1.02 / 13-November-2007) 11 5.5.1 Fullstepping When operating the motor in fullstep, resonances may occur. The resonance frequencies depend on the motor load. When the motor gets into a resonance area, it even might not turn any more! Thus you should avoid resonance frequencies. Hints: Q: How to avoid motor resonance in fullstep operation? A1: Do not operate the motor at resonance velocities for extended periods of time.
QSH2818 Manual (V1.02 / 13-November-2007) 6 Revision History 6.1 Version 1.00 1.01 1.02 Documentation Revision Comment Initial Release 20-Jun-07 13-Nov-07 Author HC HC HC Description Chapter 5.6 optimum motor settings added Chapter 5.4 Back EMF (BEMF) added Table 6.1: Documentation Revisions Copyright © 2007, TRINAMIC Motion Control GmbH & Co.
