Removing power from a Interact 412

[CastleWorks]

When I remove power and air from my Bridgeport Interact 412, the spindle drops down.

I have been told I have to place a wooden block under the spindle before I shut it down to prevent this.

I have heard opinions on both sides....that this is normal and it is not normal. I am looking others who have an Interact 412 and their experience with this.

As a sidenote...if I leave the air on the spindle will still drop down when power is removed.

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[mbservice]

Sounds like your brake is not holding on the Z axis motor

[CastleWorks]

Any thoughts on how I can verify the operation of the brake or common failures with it?

Thanks

[randykj]

Any thoughts on how I can verify the operation of the brake or common failures with it?

Thanks

The brake is adjustable.
You can stand on the table and reach the Z servo above the head. You shouldn't be able to turn it by hand when the power is off

[RMARCH]

When I remove power and air from my Bridgeport Interact 412, the spindle drops down.

I have been told I have to place a wooden block under the spindle before I shut it down to prevent this.

I have heard opinions on both sides....that this is normal and it is not normal. I am looking others who have an Interact 412 and their experience with this.

As a sidenote...if I leave the air on the spindle will still drop down when power is removed.

It is common the spindle drops about .020 when removing power from both my 412 machines. I believe it says this in the manual.

[sgarciam]

Does anyone have a copy of the parameters and pc parameters ?
For the Interact 412F.