Stepper motors with integral drive electronics

Paul Boughton

JVL is introducing a range of integrated stepper motors to complement its existing Since the introduction of the integrated ac servo motor several years ago, there has been a great deal of interest in this class of motor. This is because the benefits of integrating the driver and controller in the motor unit are so numerous.

Quickstep is a new series of integrated step motors from JVL. The range offers motors with various functions and options. The basic unit is a high-torque step motor with flange dimensions of 57x57 mm (Nema23). The housing is constructed to provide IP55 protection or better. One or more PCBs and various connectors can be mounted in the housing to enable the various models to be configured.

Among the many features that can be specified there are a pulse/direction driver, a serial RS485 position controller with graphical programming, a choice of point-to-point or multi-axis operation of up to 255 axes on the same RS485 bus, optional Canbus, Canopen 402 or Devicenet communications, an optional magnetic encoder with a resolution of up to 1024 pulses/revolution for stall detection, eight IO that can be configured as inputs, outputs or 10-bit analyser inputs, and electronic gearing for following an encoder or pulse train in a arbitrarily selectable controlled ratio.

Because the MAC (integrated ac servo) motor protocol is used, both MAC motors and Quickstep motors can be connected to the same RS485 bus.

All modules are supplied with M12 connectors, though customer-specified connectors or cables can be supplied for OEM orders. Power supply is 12-48V dc, which delivers high torque at high speed, and there is an option for double voltage supplies so that the position and parameters are maintained during an emergency stop. ASCII commands are used for simple PLC/PC set-up and communication.

Versions with built-in position controller benefit from 1600 pulses/revolution for, or versions with pulse/direction inputs can be specified with 200, 400, 800, 1000, or 1600 pulses/revolution.

The motors are available with torque ratings of 1.1, 1.6 and 2.5Nm; backlash-free and planetary gears with ratios of 3, 5, 10, 20, and 100 can also be supplied as standard.

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