Transfer device for workpieces and method for the transfer of workpieces
AssigneeKomax Holding AG
InventorHilmar Ehlert
Life of this patent
Estimating the term…
Abstract
A transfer device using a workpiece carrier to feed workpieces to workstations for processing. The workpieces are held firmly on the workpiece carrier by a holding device (3.1). Provided on a transfer table are guiderails that serve the linear guidance of the workpiece carrier in the “x” direction. Provided for each work station is a drive with a motor and a driving wheel that drives a double-sided toothed belt which in turn engages in a toothing of the workpiece carrier. A scale is arranged on the workpiece carrier and a stationary sensor form a position emitter whose signal enables the precise positioning of the workpiece carrier.
Claims13
A transfer device for workpieces that for the purpose of processing are feedable by at least one workpiece carrier to at least one workstation, and at least one drive that moves the workpiece carriers linearly, comprising:
- a sensor for generating an actual motor position value signal from registering rotational motion of a motor of the at least one drive;
- a position emitter associated with the at least one drive for registering a position of the workpiece carrier and generating an actual emitter position value signal;
- and
- a position regulator being responsive to said actual motor position value signal for controlling the motor prior to the workpiece carrier reaching a destination area and being responsive to said actual emitter position value signal for controlling the motor when the workpiece carrier is in the destination area.
A method for the transfer of workpieces with a transfer device comprising the steps of:
- operating the transfer device to transfer the workpiece along a transfer path on a workpiece carrier into a destination area;
- generating a signal that corresponds to a rotational movement of a motor shaft of a motor moving the workpiece carrier;
- using the signal as an actual motor position value to control the motor;
- and
- on reaching the destination area, using a signal of a position emitter registering a position of the workpiece carrier as an actual emitter position value to control the motor, the workpiece carrier being moved into the destination area by the motor.
A method for the transfer of workpieces with a transfer device comprising the steps of:
- operating the transfer device to transfer the workpiece along a transfer path on a workpiece carrier into a destination area;
- generating a signal that corresponds to a rotational movement of a motor shaft of a motor moving the workpiece carrier;
- using the signal as an actual motor position value to control the motor;
- and
- on reaching the destination area, using a signal of a position emitter as an actual emitter position value to control the motor, the workpiece carrier being moved into the destination area, and including determining a position of the workpiece on the workpiece carrier by moving the workpiece carrier to a reference mark of a code carrier and then moving further, until a stationary sensor detects a conspicuous point of the workpiece, a path from the reference mark to the conspicuous point being measured by the position emitter.
Dependencies are inferred from the claim text.