> > Even though it's unlikely it could fail. Commercial drives use to have a
> > safe
> > torque off input. I expect it work for AC motors but if a DC motor is
> > overloaded semiconductors usually fail with short so it could run at full
> > speed
> > in one direction even if control signals are
> Even though it's unlikely it could fail. Commercial drives use to have a safe
> torque off input. I expect it work for AC motors but if a DC motor is
> overloaded semiconductors usually fail with short so it could run at full
> speed
> in one direction even if control signals are turned off.
T
> ...
> > > What's everyone else doing?
> >
> > For the emergency stop I would buy a real emergency button and connect so
> > that power is cut to make machine stop. Then pressed it should also be
> > sensed so that emergency stop in Linuxcnc is toggled. I would not trust
> > emergency button in L
> > Now click on the little orange icon to re-enable the system, ENABLE goes
> active and the AC Motor Power Relay switches ON.
> >
> > Interlocks prevent this while:
> > 1. An ESTOP is still pressed
> > 2. Spindle Motor Switch is in ON position,
> > 3. Limit Switches are not in ove
On Wed, 23 Oct 2019 17:16:39 -0700
"John Dammeyer" wrote:
> I've added back the safety aspect of an ESTOP event shutting down all high
> voltages. The low voltage 24V stays on as does the PC/Monitor and the AC to
> the PMDX-126 BoB. Ie. I have two 220VAC circuits. One for all the Motor
> po
Maybe I'm lost... But do you need this? Control side of the drives is up
and encoders are counting right? So why do the drives need to be ready to
actually move just because you're going to send disable estop?
The machine still isn't in the "machine on" state, so drive enables aren't
driven
On Thu, 24 Oct 2019 at 01:18, John Dammeyer wrote:
> Or will I be forced to build a circuit that makes sure the high voltages are
> within range and use the output of that to gate the ENABLE?
> What's everyone else doing?
That is what I have. Though it isn't especially difficult with my 8i20
dr
I've added back the safety aspect of an ESTOP event shutting down all high
voltages. The low voltage 24V stays on as does the PC/Monitor and the AC to
the PMDX-126 BoB. Ie. I have two 220VAC circuits. One for all the Motor power
and one for the Control power. Only the Motor Power is removed.
