Air pressure proving switch on Bridgeport V2XT or Boss
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Air pressure proving switch on Bridgeport V2XT or Boss
Got another mind blowing question for you guys. On a Bridgeport V2XT or Boss. Your spindle speed and brake are pneumatically controlled. There is a air pressure proving switch which originally prevented the machine from going forward if somebody forgot to turn the air on. What circuit can I use for this puppy on a All In One. Thanks in advance. Bob L
Bridgeport V2XT, All In One DC #A900779. Using existing SEM motors 112 Volt. Spindle to be controlled by Lenze AC Tech VFD mod #ESV222N02YXB. Machine is being run on 208 3Phase power.
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Re: Air pressure proving switch on Bridgeport V2XT or Boss
Add it to the spindle fault?
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.
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.
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- Posts: 77
- Joined: Sat Oct 19, 2019 3:53 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
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- Location: Hoboken, NJ
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Re: Air pressure proving switch on Bridgeport V2XT or Boss
You wouldn't like to explain that in English would ya?
Bridgeport V2XT, All In One DC #A900779. Using existing SEM motors 112 Volt. Spindle to be controlled by Lenze AC Tech VFD mod #ESV222N02YXB. Machine is being run on 208 3Phase power.
Re: Air pressure proving switch on Bridgeport V2XT or Boss
That would mean to wire the air pressure switch in series with your normally-closed spindle drive fault signal, so that either a spindle drive fault or lack of air pressure would open INP10, and cause a spindle fault to be reported.
If you would prefer to have a distinct message for low air pressure, then just wire it to an unused input (e.g. INP14, INP15 or INP16) and add a custom error or fault condition and message as described here:
http://www.cncsnw.com/PLCApplicationsMPU11.htm
If you would prefer to have a distinct message for low air pressure, then just wire it to an unused input (e.g. INP14, INP15 or INP16) and add a custom error or fault condition and message as described here:
http://www.cncsnw.com/PLCApplicationsMPU11.htm
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- Posts: 77
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Re: Air pressure proving switch on Bridgeport V2XT or Boss
Now were talking! Thanks
Bridgeport V2XT, All In One DC #A900779. Using existing SEM motors 112 Volt. Spindle to be controlled by Lenze AC Tech VFD mod #ESV222N02YXB. Machine is being run on 208 3Phase power.
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- Posts: 77
- Joined: Sat Oct 19, 2019 3:53 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: A900779
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Hoboken, NJ
- Contact:
Re: Air pressure proving switch on Bridgeport V2XT or Boss
Let me ask a question. What exactly is a spindle fault? I mean as far as I know it just turns. So what exactly could go wrong with the spindle? Thanks, Bob L
Bridgeport V2XT, All In One DC #A900779. Using existing SEM motors 112 Volt. Spindle to be controlled by Lenze AC Tech VFD mod #ESV222N02YXB. Machine is being run on 208 3Phase power.
Re: Air pressure proving switch on Bridgeport V2XT or Boss
That is short for "spindle drive fault". The spindle drive is a component -- either a VFD or a reversing motor starter with an overload relay -- that controls the power going to the spindle motor.
Usually, the spindle "just turns". But what if you ask your 3HP spindle to take a 10HP cut? What if one of the three power leads going to the motor gets broken, so the motor cannot start turning? What if you ask your VFD to actively decelerate a 6" fly cutter from 1000RPM in two seconds, and the VFD is unable to absorb and dissipate the energy fast enough? What if there is a short-circuit in the motor windings? What if the spindle bearings seize up so the motor cannot start?
All of those things would generally cause a VFD to shut off and report a fault condition; or would cause the overload relay on a motor starter to trip. That is what "spindle fault" should mean.
Usually, the spindle "just turns". But what if you ask your 3HP spindle to take a 10HP cut? What if one of the three power leads going to the motor gets broken, so the motor cannot start turning? What if you ask your VFD to actively decelerate a 6" fly cutter from 1000RPM in two seconds, and the VFD is unable to absorb and dissipate the energy fast enough? What if there is a short-circuit in the motor windings? What if the spindle bearings seize up so the motor cannot start?
All of those things would generally cause a VFD to shut off and report a fault condition; or would cause the overload relay on a motor starter to trip. That is what "spindle fault" should mean.
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- Posts: 77
- Joined: Sat Oct 19, 2019 3:53 pm
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- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: Hoboken, NJ
- Contact:
Re: Air pressure proving switch on Bridgeport V2XT or Boss
Got the picture. Thanks
Bridgeport V2XT, All In One DC #A900779. Using existing SEM motors 112 Volt. Spindle to be controlled by Lenze AC Tech VFD mod #ESV222N02YXB. Machine is being run on 208 3Phase power.