On 9/19/22 11:54, Alan Condit wrote:
Well I haven’t got it fixed yet but I think I discovered what the problem is. I
used G251 drivers on the lathe but on the PCBMill I switched to KL5056 drivers.
I missed the connection of 5V to P1-2. P1-4, and P1-6 on the KL5056. I
misinterpreted the connection schematic. I thought they were showing an
internal pull-up to 5V rather than what I needed to supply.
Alan
Generally, and I don't think the Auto Tech drivers vary, the enable input
has a default of on, so I've never bothered to hook it up. Ditto for the 3
phase drivers I'm slowly converting to.
If you turn it off, you should rehome the machine before resuming working
operation. If you don't turn them off, you don't lose home as you power
them up again. Generally they do not remember which microstep they were
at when the disable was done, so you loose home by the motor resetting to
a full step position when next enabled. So a 2 phase stepper may go into
low
current modes but still uses some power to hold position.
This is another advantage of the new 3 phase stepper/servo motors and
drivers, when in position, driver current is only sufficient to hold
position,
no need to power them down. The only time they'll lose position is if they
can't get to where they were told to go, aka balanced.
So if you wire their alarm back into hal to toggle the F2 key off, and your
motor power is controlled by the F2 state, you'll never move the machine
w/o homing it first. I now have all my stuff rigged for full machine
power off
when the F2 is disabled. AC to the motors, all of them, is controlled by
a couple
40 amp SSR's one for each side of the 240 here in the USA. So when I
kill F2
and leave LinuxCNC running, only the computer is still powered.
To me, the power savings are substantial.
From: Alan Condit <condit.a...@gmail.com>
Subject: Re: [Emc-users] 7i76e with Rpi4
Date: September 18, 2022 at 7:00:08 PM CDT
To: emc-users@lists.sourceforge.net
Sam and Robin,
I found the immediate problem. The address should have been 10.10.10.10
rather than 10.10.10.11.
I have a CNC’d Grizzly G4000 that is running a 5i25 with a 7i76. I tried
wiring the 7i76e the same as 7i76. LinuxCNC fires up now but none of the
motors spin. However, the motor all hold.
Thanks,
Alan
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Cheers, Gene Heskett.
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