Fanuc Auto Speed Limiting

AutoMattic21 · September 27, 2021 at 6:59 PM

Hello All.

We have a cell with 4 FANUC ArcMate 100ic Running with System R-30iA all working off of the same pendent. All Robots are used for Mig Welding.

The issue We're running into has to do with limiting the Max Speed of the robots.

We've spent most of our time up until now running everything in teach to learn how the machines work and to get parts off ASAP.

We're now in a spot where we are ready to run in Auto, but the speeds we used in teach are WAY too fast when running in auto.

This was a used cell and we'd like to relax the workload on the robots by reducing the max speed to the robots.

Because this is a mig weld cell, we must run in 100% override to allow them to weld.

The hope was that we'd be able to do this without going through every single point in every single program to reduce speed.

We've attempted to change the $MCR_GRP[1].$PRGOVERRIDE variable, but when we ran the program, it reverted the variable back to 100%. I made sure i did this in a controlled start, changed the value to 50, and after the cold start I checked the variable and it still said 50. I ran a simple program, and checked the variable again and it was back to 100%.

I'm not sure where to go from here, so any help would be appreciated

pdl · September 27, 2021 at 9:12 PM

If your speeds are too fast, why don't you just lower the speeds of each movement instruction?

Posting your code would really help.

AutoMattic21 · September 27, 2021 at 9:16 PM

Was hoping to avoid that as we'd have upwards of 40 programs to weed through to slow down.

As for the code, its just standard movement code, nothing special there.

Boyd · September 27, 2021 at 10:38 PM Best Answer

If anything you could always use replace under the "EDCMD" button to change all % movements to a desired speed, I know its still 40 programs but at least you don't have to go line by line.

pdl · September 28, 2021 at 12:11 AM

Do you have RoboGuide or the ASCII upload option?

Making these changes offline would be fairly simple and much quicker.

TitusLepic · September 28, 2021 at 6:32 PM

You can use the program adjust utility to change all speeds if you want your new speed across the board.

Sergei Troizky · September 29, 2021 at 12:19 AM

Use Override Select function.

- Assign any inputs to Signal 1 and Signal 2.

- For all input combinations, set the same desired override %.

- Enable the function.

Boyd · October 28, 2021 at 3:09 PM

You could set the program override to 50 75 whatever your need is and then in BGLogic you could use the same program override variable to set the speeds back to 100 IF arc detect was ON

AutoMattic21 · November 2, 2021 at 2:47 PM

Sorry for the late response to this, got pulled off onto a different project for a while.

I went with the find and replace option to slow down all of my moves and it worked quite well.

Thanks to everyone for their thoughts on this!

Fanuc Auto Speed Limiting

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