Forward and reverse relays

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Philtrueman
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Forward and reverse relays

Post by Philtrueman »

I have a problem with the forward and backward spindle control buttons on the VCP. It is possible to go from forward to reverse without having to press the stop button first. Does anyone have a wiring diagram that will solve this problem? I have folowed the wiring diagram of Franco on you tube.
cncsnw
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Re: Forward and reverse relays

Post by cncsnw »

With most spindle-control methods, that is not a problem.

How are you powering your spindle motor?

Changing the spindle start/stop/direction logic can be done. It would require changes to the PLC program.

For your machine, how long should your control wait, after a spindle-stop command, before it should be allowed to start in the other direction?
cnckeith
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Re: Forward and reverse relays

Post by cnckeith »

Philtrueman wrote: Thu Jan 06, 2022 4:36 am I have a problem with the forward and backward spindle control buttons on the VCP. It is possible to go from forward to reverse without having to press the stop button first. Does anyone have a wiring diagram that will solve this problem? I have folowed the wiring diagram of Franco on you tube.
what are you trying to accomplish with this?
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
tblough
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Re: Forward and reverse relays

Post by tblough »

If you have a VFD controlling your spindle, it will control the deceleration to 0 and then the acceleration to the set speed in the other direction without damage to the motor if your parameters and tuning are correct. There is no need to physically stop the motor before changing directions.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
Philtrueman
Posts: 5
Joined: Mon Jan 03, 2022 11:52 am
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DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: none

Re: Forward and reverse relays

Post by Philtrueman »

Many thanks for the reply. I tested the forward and reverse and like you said it slows down and then goes in the oposite direction smoothly.
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