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TOPIC: Stop Motor Smoothly

Stop Motor Smoothly 1 year 3 months ago #2421

  • vik748
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We were using just OFF before, this whole issue came up because we want to do a controlled stop and free wheel when stopped.
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Stop Motor Smoothly 1 year 3 months ago #2422

  • mmeyer
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X OFF will give you a controlled stop. Does you motor have an integrated brake?
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Stop Motor Smoothly 1 year 3 months ago #2423

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We are using a SM17205D, I don't believe we have the optional brake on there.
When I do 'X OFF', the motor stops immediately without following the deceleration limit.
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Stop Motor Smoothly 1 year 3 months ago #2425

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Allow me to clarify...

Since you are sending these commands individually, rather than programming them into the motor, TWAIT (as in option c) will not work. Instead, the motor bypasses this and goes straight to OFF, which is why you get a sudden stop. However, in option b, as I had previously mentioned, the wait command is too long and with repeated sending of commands, the OFF & BRKRLS are never enacted. It would probably be better to include a subroutine within the motor itself, and repeated call that subroutine. Something like:

C1
X TWAIT BRKRLS OFF
RETURN

where you continually issue a "GOSUB1" should get you the desired results. Otherwise, you would have to time the WAIT value to be the time of your acceleration, which I'm guessing is non-constant.
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Stop Motor Smoothly 1 year 3 months ago #2426

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This might work, I'll give this a shot.

Thanks for your help.
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