Warco mill soft start

Hello,

I own WM18B with variable speed. Following manual I always set speed to minimum before switching on. Spindle gradually building up rpm from 0 to about 250 in a few seconds which I believe is called a soft start.

Recently I've noticed that very often motor gets on to minimum revs instantly when switched on. I wonder if this could have a bad effect on the motor or control board.

Machine is still under warranty but I thought it would be best to get some idea before I contact Warco.

Thanks

Tom

Hi Tom

If it's not working as intended because there may be a fault on the motor controller it would be best to contact Warco as you say and explain your issue.

Emgee

If you have an inverter/VFD then this is just a parameter you set, usually called "Acceleration time" and measured in seconds from 0.1s to 3600s.

Presumably, the 3600s setting is for use on James Webb space telescopes and stuff like that. I hear their mirror alignment servo's move slightly slower than grass grows

My Warco WM16B starts softly and runs up to about 100rpm when switched on with the speed control set to minimum.

I contacted Warco, and apparently this is normal.

Thank for all the input.

I will contact Warco as it worries me that machine doesn't always start "softly" now. I'm afraid it could be an early sign of serious failure.

Robin, regarding new space telescope, mirror actuators can move in steps that are a fraction of a wavelength of light (1/10000th diameter of human hair), that's some accuracy!

Tom

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