E-stop questions

General
1

Howdy friends, two e-stop questions if I may…

  1. Seems like the e-stop button should always stop the spindle along with machine motion, no? I tried in both auto and manual override modes of the VFD. Are there some things I can check?
  2. When shutting down the machine, I’ve had to be meticulous about moving the spindle close to home and then lowering the spindle as low as possible before either hitting the e-stop and/or killing the power.

Without doing so, the weight of the 80mm spindle is more than the Z gantry can handle and it falls. I’ve read that the spindle moving with the power off can kill the stepper motor drivers with the feedback voltages that are generated.

Even without killing the power, the e-stop will drop the motor, presumably driving the bit into the work. And since the spindle doesn’t stop, look out below!! :confused:

Grateful for any feedback if something can be tuned, but it’s not the end of the world if that’s how it’s going to be.

2

I have a Onefinity foreman elite and my spindle stops in place when e stop is hit and stays up when I turn off machine

Onefinity offers a z motor with a brake and it works well, it is a direct replacement and very easy to install

I don’t know the brand of CNC you are using but I would look for a braking z motor

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3

Thanks, sorry I didn’t provide that. It’s a 1F with a MASSO Touch controller. The spindle is the 80mm Pwn with v5 VFD + ATC kit.

My understanding of the braking resistor is that it’s very helpful to more quickly stop the spindle, but the controller needs to tell the VFD to stop in the first place. My first debugging was getting the controller to start the VFD in auto mode, but now that’s out of the way and it can’t seem to stop the spindle, either in auto or manual mode.

4

Oh wait… this is different from the braking resistor?

5

What @DaddyDan is referring to stops the z axis from dropping.
What you are referring to reduces the time it takes for the spindle from rotating.

To address your issue, I have been able to duplicate your experience by selecting spindle auto stop / resume on feedhold in the main spindle settings.
Answer, deselect the option

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6

Thanks @Chris. That setting did allow the e-stop to turn off the spindle when the VFD is in auto mode, but not when it is in manual.

Does your e-stop also stop the spindle when the VFD is in manual?

Thanks to you and @DaddyDan for the information on the Z motor with brake. I’ll search that out and decide when to move forward with it. Want to build some projects and earn into the current spend first…

7

It does not.

It electronically takes the controller (this case masso) out of the equation and needs to be thought of as a standalone device, and all controls are given at the keypad to include stop.

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