Sewing Machine Showroom in Perambur, Chennai - VS SewingMachine
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Automated sewing is a
complicated task in manufacturing. Due to the non-rigid work pieces and
variations in the material characteristics, sensor-based control has to
be used to accomplish the sewing operation. This paper presents a
strategy for velocity synchronization and corner matching in an
automated sewing cell based on two industrial manipulators and a sewing
machine. A hybrid force/motion control scheme is adopted using feedback
from force/torque sensors for tension control and optical sensors to
control the seam position. The strategy is based on switching between
force control and displacement control using a leader/follower
coordination scheme. This addresses the problem of corner mismatch
occurring when two independent force controllers are used for
controlling the two robots. Experiments verify that the proposed method
gives a satisfactory corner matching, which is crucial for the presented
sewing case.
The automation of sewing operations is a difcult taskin manufacturing. Several challenges arise from the non-rigidity and the large variations and uncertain material char-acteristics of the processed materials. This makes the designand implementation of both material handling and controlduring the sewing applications a complex task compared tohandling rigid materials. Nevertheless, there is a demandfrom the industry in high-cost countries to automate thesewing process.In the past decades, several research groups have workedin the eld of automated sewing and the handling of non-rigid materials.An automated sewing cell consisting of one robot and asewing machine is presented in. Both the tensionin the work piece and the seam allowance are controlled inreal-time.
Another sewing cell demonstrator based on a single robotand a sewing machine is presented in [6]. The task is to sewan assembly of two similarily shaped parts. A triangulation-based sensor is used for edge detection while optical motionsensors are used for measurement of the sewing speed.A demonstrator based on a sewing machine with a servo-controlled feeding mechanism is presented in [7]. Two parts,that are separated by a thin plate, are controlled indepen-dently by the servo mechanism. An open loop path controlis used which utilizes recognition of patterns on the fabric.The need for sensor-based feedback control is emphasizedby the authors.
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