Electromagnetic Chuck hooked into Haas Relay

G

GaryHouser

Plastic

Joined

Feb 24, 2021

• Feb 24, 2021

• #1

Hey all,
I am new to electromagnetic chucks and couldn't find any info on this. Currently I have a vacuum fixture to do all our panel workholding, but I want to look at switching to magnetic.

I guess i'm wondering if I can you wire a chuck to a relay on a Haas and have it controlled by M-code? If possible, would you wire it into a controller first and then wire the controller to the relay or just wire the chuck straight in to the relay and use that as the on-off controller?

 

kustomizer

Diamond

Joined

Aug 17, 2007

Location

North Fork Idaho

• Feb 24, 2021

• #2

I would be inclined to wire it into a controller first and then wire the controller to the relay

 

G

GaryHouser

Plastic

Joined

Feb 24, 2021

• Feb 24, 2021

• #3

Thanks for the response. So if I leave the controller switch to the "on" position, and power off the relay, the magnets will disengage and reengage when the relay is powered? It may be a dumb question, but without being to familiar with the mechanism, I want to make sure before I buy the chuck and controller. Thanks again!

 

kustomizer

Diamond

Joined

Aug 17, 2007

Location

North Fork Idaho

• Feb 24, 2021

• #4

I would say that would be likely but we would neeed to know more about your controller, you may need a contactor to drive it. The little relay in your Haas says on it how much power it can switch, you may have to do some testing to see how much your magnet needs.

 

C

Cyclotronguy

Stainless

Joined

Sep 21, 2005

Location

Northern California

• Feb 24, 2021

• #5

DO NOT DROP THE POWER ON A MAG CHUCK. You have to ramp the voltage down and on a large chuck you are going to likely need a de-mag cycle as part of the process.

Dropping the power abruptly causes back EMF as the field collapses You can add a free wheeling diode bridge and some resistance to manage the effect.

And a story. I was in a shop where there was a large mag chuck with something close to 90Vdc on it when the mains power went out. They never found all the pieces of the disconnect switch.

 

G

GaryHouser

Plastic

Joined

Feb 24, 2021

• Feb 24, 2021

• #6

Wow, so on the controller when you switch it to "off" it most likely ramps the voltage to the chuck down slowly. Otherwise, what's the difference between cutting power to the controller vs turning the controller to the off position? I see why automating vac fixtures is easier to find info on ;D. A solenoid powering a vac generator with some monitors wired in seems safer at this point.

 

kustomizer

Diamond

Joined

Aug 17, 2007

Location

North Fork Idaho

• Feb 25, 2021

• #7

At this point we don't know much about your chuck making it hard to offer any real help

 

G

GaryHouser

Plastic

Joined

Feb 24, 2021

• Feb 25, 2021

• #8

kustomizer said:

At this point we don't know much about your chuck making it hard to offer any real help

Click to expand...

https://www.mscdirect.com/product/details/08543688 This is the chuck I was looking at. I don't currently have anything yet. I hope it's okay to post links here

 

C

Cyclotronguy

Stainless

Joined

Sep 21, 2005

Location

Northern California

• Feb 25, 2021

• #9

No across the line power switching on that piece. And most likely a degauss cycle

 

kustomizer

Diamond

Joined

Aug 17, 2007

Location

North Fork Idaho

• Feb 25, 2021

• #10

My inclination would be to call Walker, they should be able to give you the best info.
Electromagnetic Chuck Controls - Walker Magnetics

 

G

GaryHouser

Plastic

Joined

Feb 24, 2021

• Feb 26, 2021

• #11

kustomizer said:

My inclination would be to call Walker, they should be able to give you the best info.
Electromagnetic Chuck Controls - Walker Magnetics

Click to expand...

Thanks for the info guys, i will call Walker.