Extern Axis change Rotation speed

What's the application ?

Which external axis is it ? ABB's own, 3rd pary ?

Assuming the gear ratio is correct, i.e. you rotate it 360-degrees on the pendant and it represents 360 degrees in reality, your solution is to measure a base frame and coordinate your movement (w. a moving work object linked to your external axis).

The "lazy" solution is to define your own speed data and change the r-eax (rotational external axis) to a lower number than default (which I think is 5000 or something on all pre-defined speed data).

Have you looked into independent move under rapid instruction. Just a thought...

Quote from padostms78

Dear Community

I have an IRB 4600 with External axis.I need a help to reduce rotation speed from external axis.My start diagonal is 500mm end is 600.

I have no multitasking.

Thanks for any help

Tom

I just do not understand your question. You are asking about rotation speed but mention "diagonal" when axis speed is usually rpm. And you mention 500mm and 600. Can you please explain better/rephrase your problem?

Just create new speed data and define each speed value.

You can set limit rev/mm or rev/deg.

var speeddata vMyspd := 500, 500, 40, 5

MoveJ p30, vMyspd, Fine, tool0;

So if the jumping is an issue on speed increases you could decrease the parameters for Accel Max, that would cause it to speed up more slowly. Also, you could look into Accset instruction. In particular, ramp, which should reduce jerkiness. Note that it will also affect the robot.