Author Topic: Collision detection command  (Read 408 times)

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Offline tianxiang84

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Collision detection command
« on: March 19, 2018, 09:36:40 PM »
Dear FANUC expert,

We have a code here written by a distributor. There is a line "COL GUARD ADJUST 120".

I am told it is detection of collision and that number 120 is relative to the force sensitivity. But can any one tell me more about what that 120 mean exactly? Like what's its range (from 0 to some value?) and what to expect if I tune this value smaller or larger?

Thank you.

Regards,
Tianxiang

Offline HawkME

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Re: Collision detection command
« Reply #1 on: March 19, 2018, 11:02:10 PM »
The sensitivity ranges from 0-200.

100 is default. The higher the number, the more sensitive it is to disturbances.

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Offline pdl

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Re: Collision detection command
« Reply #2 on: March 19, 2018, 11:43:49 PM »
Be warned, collision guard is extremely dependant on having an accurate payload defined in your payload schedules.

Offline Atinder

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Re: Collision detection command
« Reply #3 on: March 20, 2018, 11:08:31 AM »
If your robot is not operating near any machinery or if there is a lot of workspace for your robot or your taught path has no obstacles nearby and you know that your robot won't collide anywhere you can even disable Collision Detection. To do so go to Menu>> Setup>>F1[Type]>> Col Guard.

Offline pdl

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Re: Collision detection command
« Reply #4 on: March 20, 2018, 08:30:06 PM »
you can even disable Collision Detection

I can't think of one logical reason why you would ever want to do this.  I can think of several reason why you would not do this though...

Online stare284

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Re: Collision detection command
« Reply #5 on: March 21, 2018, 09:41:11 AM »
you can even disable Collision Detection

I can't think of one logical reason why you would ever want to do this.  I can think of several reason why you would not do this though...

We had to do this Monday due to a reducer failing.
Replacement reducer is on order but will not arrive for another week or so and the machine needs to run so turning off collision detect is the only way to keep production running as usual.

Offline Atinder

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Re: Collision detection command
« Reply #6 on: March 21, 2018, 12:08:11 PM »
you can even disable Collision Detection

I can't think of one logical reason why you would ever want to do this.  I can think of several reason why you would not do this though...
In some of my applications with the Injection Molding Machines, I have very limited space to work with and every time I program it and keep the collision guard enabled it will keep on going to alarm even if I reduce the sensitivity or even if the robot is not even close to hit anything. So for some of my applications I have to keep it disabled to reduce downtime.

Fair enough pdl or not.What do you say?

Moreover, if you can't think of any reason to disable it, that's totally fine but I thought I can work with this option disabled and even that's totally fine. That is the reason Fanuc gives you two options with software- Enable or Disable, use it according to your need.
« Last Edit: March 21, 2018, 01:25:32 PM by Atinder »

Online alive15

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Re: Collision detection command
« Reply #7 on: March 21, 2018, 04:34:01 PM »
Need to be careful though, if the robot decides not to follow the program and goes whichever way, it can cause severe equipment damage or injury to someone.