On Mon, Apr 05, 2010 at 07:56:51AM -0700, Peter C. Wallace wrote:
On Mon, 5 Apr 2010, Erik Christiansen wrote:
A) Is it safe to interrupt Motor Power to my 7i40s, with hairy great
inductive motors on their outputs? (OK, mostly resistive under load,
but then back EMF might also be deadly
A DPST will perform the function fine, unless you want DPDT for some other
reason.
Roland
On 6 April 2010 14:39, Erik Christiansen dva...@internode.on.net wrote:
On Mon, Apr 05, 2010 at 06:08:15PM +0200, Jan de Kruyf wrote:
Hallo,
The accepted wisdom with commutator d.c. servo motors was
On Mon, Apr 05, 2010 at 07:56:51AM -0700, Peter C. Wallace wrote:
A good Estop system is to disconnect servo primary power and at the
same time discharge the servo filter capacitors with a resistor for .5
- 1 second decay time. This will brake the motors so the voltage decay
should not be
Indeed, FWIW, it's called dynamic braking.
Yeat another UBI (Useless Bit of Information) :)
On 04/06/2010 07:39 AM, Erik Christiansen wrote:
On Mon, Apr 05, 2010 at 06:08:15PM +0200, Jan de Kruyf wrote:
Hallo,
The accepted wisdom with commutator d.c. servo motors was always to
have a
On Mon, 5 Apr 2010, Erik Christiansen wrote:
Date: Mon, 5 Apr 2010 23:38:59 +1000
From: Erik Christiansen dva...@internode.on.net
Reply-To: emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Estop strategy for Hostmot2 (7i40 x 2 + 7i37)
I'm about to
Hallo,
The accepted wisdom with commutator d.c. servo motors was always to
have a contactor break the motor wires and short the motor armature
through a resistor. The shorting of the armature works as a brake to
stop the motors reasonably quick. The resistor in series is needed so
the armature
On 5 April 2010 13:38, Erik Christiansen dva...@internode.on.net wrote:
A) Is it safe to interrupt Motor Power to my 7i40s, with hairy great
inductive motors on their outputs? (OK, mostly resistive under load,
but then back EMF might also be deadly if V+ is open-circuited?)
I don't know
