May 22, 2019, 01:07:11 PM
Robotforum | Industrial Robots Community

 Fastest Collaborative Robot?

normal_post Author Topic:  Fastest Collaborative Robot?  (Read 768 times)

0 Members and 1 Guest are viewing this topic.

June 12, 2018, 04:08:32 PM
Read 768 times
Offline

K-Bizzle


I've used Fanuc's CR7 and Universal UR5/10s in the past and all left to be lacking in the speed department.
I'm considering a new project that will require a collaborative and I'm wondering if any of the other options are any faster.
I know there are obvious speed limitations due to collaborative needs but I'm just wonder if any of the other options (Kuka, Motoman, ABB, etC) offer slightly faster collaborative models.

What does everyone say?
Any experience will be helpful.

June 13, 2018, 02:27:14 PM
Reply #1
Offline

SkyeFire

Global Moderator
Faster, in what way?  Most especially, in what operation mode?

For example, the KUKA iiWA can move at speeds similar to a non-collaborative robot in the same payload class... but not in collaborative mode.  Any cobot operating in collaborative mode (that is, with humans within its unprotected reach), must operate at very reduced speeds, in order to satisfy the RIA safety requirement.  This is not influenced by brand or model, but by the strict limits on total kinetic energy and safe stopping distance.

June 13, 2018, 07:30:34 PM
Reply #2
Offline

K-Bizzle


in what operation mode[/b]?

For example, the KUKA iiWA can move at speeds similar to a non-collaborative robot in the same payload class... but not in collaborative mode.  Any cobot operating in collaborative mode (that is, with humans within its unprotected reach), must operate at very reduced speeds, in order to satisfy the RIA safety requirement.  This is not influenced by brand or model, but by the strict limits on total kinetic energy and safe stopping distance.

Thanks for the reply Skye.
As you mentioned they must move at reduced speeds but I wasn't sure if any had superior tech in sensing, torque control, collision stopping, or otherwise that allow them to run slightly faster and still meet safety requirements.
Main reason I ask is it seems like the URs moved faster through space than the CR7 however it could 100% be my imagination.

June 16, 2018, 01:50:46 PM
Reply #3
Offline

SkyeFire

Global Moderator
I'm not an expert on Cobots, so I can't speak to it definitively.  However, AIUI, Cobot speed limits are set by the kinetic energy limits.  A smaller payload can move faster, but not much, since kinetic energy scales linearly with mass, but also linearly with the square of the velocity.  So halving the mass would, at best, only allow you perhaps a 50% speed increase.

Some brands may be able to stop faster than others on a collision detection, and thus have their limits set higher, but I doubt the difference would be very significant.  A Cobot, by its nature, cannot detect a collision until after the collision has already happened, at which point the stopping distance must be very short indeed -- at that point, there's just not a lot of difference between brands at how fast they can slam their brakes shut.  Inertia is king, here.


Share via facebook Share via linkedin Share via pinterest Share via reddit Share via twitter

xx
Nachi MZ07 fastest robot model

Started by scgorlewar on General Discussion of Industrial Robots Only

0 Replies
1395 Views
Last post June 23, 2014, 03:20:27 AM
by scgorlewar
xx
Run collaborative robot

Started by Youss49 on Universal Robots

1 Replies
192 Views
Last post April 04, 2019, 01:30:58 AM
by matthewd92
xx
Collaborative robot

Started by Lerak on General Discussion for Cobots

0 Replies
1597 Views
Last post May 12, 2015, 07:08:39 PM
by Lerak
xx
Collaborative Robot max speed

Started by USURP_RUR on Fanuc Robot Forum

1 Replies
1432 Views
Last post April 07, 2017, 01:51:44 AM
by pdl