Servo-Driven Dispensing Robots

Jul 15, 2013

Servo driven dispensing help to maintain a constant flow rate of material, even if the temperature of the material varies. The servo driven dispensing systems also make it simple for the user to choose among the preset profiles before beginning the cycle. Another huge benefit is that servo technology enables the user to vary the material flow rate during the dispense cycle.


A robot’s dis­pens­ing per­for­mance is heav­i­ly reliant on two fac­tors: the meter­ing prin­ci­ple which defines the deliv­ery process, and the motor dri­ve selec­tion which deter­mines the flu­id con­trol method, espe­cial­ly in adhe­sives and sealants. A ser­vo motor con­sists of a motor attached to a sen­sor for posi­tion feed­back, and allows pre­cise con­trol of angu­lar posi­tion. Although ser­vo motor dri­ven dis­pens­ing equip­ment will cost more ini­tial­ly, the return on invest­ment is greater than oth­er low­er cost devices. Ser­vo motors ensure pre­cise con­trol and repeata­bil­i­ty of both posi­tion and veloc­i­ty. They allow close mon­i­tor­ing of the dis­pens­ing process. For high speed auto­mat­ed dis­pens­ing, a ser­vo dri­ve is recommended.

Ser­vo motor dri­ve tech­nol­o­gy is also sug­gest­ed for: com­plex bead paths, mul­ti­ple parts with dif­fer­ent dis­pens­ing require­ments, vary­ing volume/​flow dur­ing a cycle, and using the meter as a 7th robot axis.

A main ben­e­fit of ser­vo motor dri­ven dis­pens­ing is that it can main­tain the flow rate of mate­r­i­al even if the sys­tem or dis­pens­ing envi­ron­ment is altered. For exam­ple, if ambi­ent tem­per­a­ture of the mate­r­i­al varies chang­ing the pres­sure in the dis­pense cycle, the ser­vo dri­ve can increase or decrease the amount of cur­rent sup­plied to the motor. Ser­vo dri­ve motors also encour­age pre­set shot pro­files with sep­a­rate vol­ume and flow rate that can be blend­ed between seg­ments. This makes it sim­ple for the user to choose among the pre­set pro­files before begin­ning the dis­pens­ing cycle. Last, ser­vo tech­nol­o­gy enables the user to vary the mate­r­i­al flow rate dur­ing the dis­pense cycle.

Sealant Equip­ment and Engi­neer­ing offers the Ser­vo-Flo 105, a dual ser­vo dri­ve meter mix dis­pense sys­tem for adhe­sives and sealants. The Ser­vo-Flo 105 is ide­al for appli­ca­tions requir­ing pre­ci­sion vol­u­met­ric shot or bead pro­file dis­pens­ing of vis­cous and abra­sive mate­ri­als. It dis­pens­es two-com­po­nent mate­ri­als in high vol­ume pro­duc­tion or in man­u­al appli­ca­tion. Sealant Equip­ment also offers the Inte­grat­ed Ser­vo Dis­penser (ISD), designed to dis­pense seal­er mate­ri­als in high vol­ume pro­duc­tion appli­ca­tions by inter­fac­ing with robot­ic mount­ed applicators.

Ser­vo dri­ve tech­nol­o­gy uses easy, accu­rate oper­a­tor inter­face con­trols. Increased demands for pre­ci­sion, high­er torque in small pack­ages, and longer main­te­nance cycles will con­tin­ue to con­tribute to the neces­si­ty for ser­vo dri­ven dis­pens­ing. Robots​.com offers a vari­ety of ser­vo-dri­ven dis­pens­ing robots. To talk to a Sales Rep­re­sen­ta­tive about choos­ing the right one for your busi­ness, click here or call 8777626881.

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