I like servo motors because: they are quiet, more power at high rpms, machines can move at least three times faster than steppers, rotational movement is smooth instead of jerky.

The two types of power supplies are regulated and unregulated. We prefer unregulated power supplies since the current doesn't "fold back" when it gets too high. However, an unregulated power supply's voltage may spike and blow the drive if you do not size the power supply's voltage a little lower than the drive's input voltage. The current on your power supply can be greater than the drive's, but it should not be less than the rated current of the motor. See similar questions...

Servos produce more torque at any speed than comparable stepper motors. This can be up to 400% more torque for equally rated motors. Servos are under closed-loop control via their encoders, allowing additional power to be sent to the motor when resistance is encountered. Steppers, on the other hand, will simply stall and lose their position relative to the control -- resulting in improperly machined parts. See similar questions...

A current mode amplifier has an internal feedback loop that uses the measured electrical current going to the motor as feedback. Since motor torque is proportional to the electrical current driving the motor, a current mode amplifier is also known as a torque mode amplifier. See similar questions...

All voltage converters only convert the voltage and not the cycle, however most appliances and electronics will function properly with them. See similar questions...

Direct acting valves basically consist of a small piece of magnetic stainless steel with a rubber seal on the end that moves within an electro magnet. As the seal uncovers a port (the orifice) the valve opens. When the electro magnet is de-energised a return spring closes the valve. See similar questions...

A servo is a type of closed-loop feedback circuit. A servo motor works by comparing the motor's actual position (as read from a feedback device - usually a position encoder) to the desired position (as calculated by the motion controller) and by dynamically adjusting the motion controller's command output signal so as to try to minimize the difference (error) between the two. See similar questions...

More info being compiled, but for now, check out the excellent Servo Spec Chart from Matt Verrochi's page. See similar questions...

Resonance is an unstable condition when running a step motor. Resonance usually occurs between 2-4 rev/sec and can be alleviated in most situations by putting a load on the motor, changing from full stepping to half or microstepping, or increasing your acceleration through the resonance zone. See similar questions...

The easiest way to choose a motor is to look at our torque vs. speed curves in our catalog and see what type of drive was used with a particular motor. Another method is to find the output power of the motor shaft where: P = T*W/22.5 P is Power in Watts T is the torque in oz-in W is the rotational speed in rev/sec. Take this number and double it. The resulting power will allow you to adequately size the drive for the application. See similar questions...

A stepper motor controller, more generally called Motion controller, is a system that control the rotation of motors (stepper, brushless, sevomotors) with the purpose of moving a mechanical (axis in CNC machines) to a determined position. Motion controller must not be confused with motors drivers that are the power part of a positioning system. The firsts are those systems based on a PC that give the signals for the motors through the parallel port. See similar questions...

The resolution of an axis system moved by stepper motors depend uniquely by the mechanical. The stepper motors have generally a 1.8? step angle so they make a complete rotation with 200 step when drive at full step. For example, if the motor drive a screw of 4 mm., a complete turn will make a displacement of 4 mm. and so the resolution will be 4/200 mm= 0.02 mm. Obtaining a mechanical with backslash less than this is very difficult. See similar questions...

The moderns stepper motors can reach rotation speed of 1500 RPM. It must be considered that the motor torque curve decrease considerably with the increasing of the step frequency. If we take a screw of 4 mm and we run it at 1500 RPM we obtain a displacement speed of 1500*4mm=6000mm/min or 6 m/min. In practice the stepper motors runs at max 600 RPM because the torque decrease above that values. See similar questions...

Originally, hard disk drives used a stepper motor to control the movement of the heads over the surface of the platters. A regular motor turns in a rotary fashion continuously; it can stop at any point in its rotation as it spins around, kind of like the second hand on a wind-up wristwatch. A stepper motor can only stop at predefined "steps" as it turns around, much the way the second hand turns on an electronic, quartz wristwatch. See similar questions...

Honeywell Project Engineering has applied Profit Stepper in a variety of applications for several years. See similar questions...

Profit Stepper technology can be applied to base application development (grass roots application) in open-loop mode for existing controller maintenance in closed-loop mode, and for addition of new variables in hybrid mode where a combination of open and closed loop testing/identification is employed. See similar questions...

Profit Stepper has a flexible licensing structure ranging from unit-based to site-wide options. Leasing, services-based approaches and corporate-wide usage are also offered. See similar questions...

Due to the computational requirements of the Profit Stepper identification engine it is recommended that the runtime engine execute on a DCS engineering or operator station (GUS, Flex Station or non-Honeywell computers), rather than on the application servers (APP or EAS, etc). Profit Stepper’s user interface is an integrated component of Profit Suite Operator Station or Profit Viewer (R205.2) and therefore it may run on any Windows compatible user interface computer. See similar questions...

Profit Stepper can be used with other control technologies in open-loop mode. In the current version, closed-loop mode requires use of Profit Controller applications due to the intimate integration between Profit Stepper and the Profit Controller calculation engine. See similar questions...