Understanding Robot Specifications 101

Jun 3, 2008

​Robots.com representatives take pride in their 25+ years of integration service and want to ensure that you understand the robot and correct operation standards. Also, Robots.com experts want to ensure that the payload and design features are the perfect solution for the customer's application process. Contact Robotworx experts today to start your integration process.


Every indus­tri­al robot is defined by cer­tain mea­sure­ments, pay­load, and design fea­tures. Robots​.com lists robot spec­i­fi­ca­tions to help cus­tomers deter­mine which mod­el is right for their appli­ca­tion and facil­i­ty. Learn what robot spec­i­fi­ca­tions mean, and you’ll be able to select the right robot in no time.

Axis Move­ment Specifications: 

Axes - The indi­vid­ual seg­ments of each robot manip­u­la­tor are con­nect­ed with mechan­i­cal joints — each serves as an axis of move­ment. The most com­mon indus­tri­al robots have six axes of move­ment. The num­ber and place­ment of axes deter­mines the flex­i­bil­i­ty of each model. 

Robot Motion Range — Much like the joints between bones, robot axes have lim­its to each move­ment. Every axis has a spe­cif­ic scope of motion. On a typ­i­cal spec­i­fi­ca­tions sheet, the degree of move­ment shows up as pos­i­tive or neg­a­tive degree of move­ment from the cen­ter base posi­tion of each axis. 

Robot Motion Speed — Each axis moves at a dif­fer­ent speed. They are list­ed as degrees trav­eled per sec­ond. Focus on this cri­te­ri­on when you need to match cer­tain speed spec­i­fi­ca­tions for your application. 

Repeata­bil­i­ty - Indus­tri­al robots are known for their accu­ra­cy. But this abil­i­ty to return to an exact loca­tion again and again,known as a robot­’s repeata­bil­i­ty, can vary with each mod­el. More pre­ci­sion-dri­ven appli­ca­tions will require tighter repeata­bil­i­ty fig­ures. Repeata­bil­i­ty is list­ed as a mil­lime­ter of alter­ation plus or minus from the point.

Robot Spec­i­fi­ca­tions for Weight:

Pay­load — The weight capac­i­ty of each robot manip­u­la­tor is its pay­load. This is a crit­i­cal spec­i­fi­ca­tion and includes the tool­ing weight as well. You can rule out a num­ber of robots with this robot spec­i­fi­ca­tion cat­e­go­ry alone. 

Robot Mass — Every robot has a spe­cif­ic weight or mass. This num­ber only indi­cates how much the robot manip­u­la­tor weighs. It does not include the weight of the robot­’s con­troller. This spec­i­fi­ca­tion may not be quite as impor­tant unless you are try­ing to install your robot on a table or shelf.

Spec­i­fi­ca­tions and Work Envelope:

Ver­ti­cal Reach — How high can the robot go? A robot­’s ver­ti­cal reach spec­i­fi­ca­tion refers to the height of the robot when it extends upwards from the base. Use this to deter­mine whether or not a mod­el is tall enough for your appli­ca­tion and location. 

Hor­i­zon­tal Reach — How far can a robot reach? The hor­i­zon­tal reach mea­sures the dis­tance of the ful­ly extend­ed arm — from the base to the wrist. Some appli­ca­tions will require a wider work enve­lope with a big reach, oth­ers are sat­is­fied with a con­tained, short hor­i­zon­tal reach. 

Struc­ture — Robots are engi­neered with dif­fer­ent struc­tures. The most com­mon by far is the ver­ti­cal artic­u­lat­ed type, some­times called a ver­ti­cal joint­ed-arm robot. Oth­er struc­ture types include SCARA, Carte­sian, and par­al­lel kine­mat­ic robots.

If you have a robot spec­i­fi­ca­tions ques­tion con­tact Robots​.com at 8777626881 or online to reach a robot specialist.

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