I see someone is watching the emc-at-work.ogg, which explains why the leds on
the switch are going steadily. I wish I did have more upload bandwidth but
this is a verizon circuit. Sorry about that, whoever you are at an rr.com
address. Boring movie ain't it. ;-)
--
Cheers, Gene
"There are f
On Sun, 10 Jan 2010 12:12:38 -0500, you wrote:
>Don't forget the latency of the opto couplers in the breakout boards...
That's a very good point, there are many breakout boards out there that
still use components designed in the 70's.
"Opto isolated" boards seem to suffer most. Earlier this year
B GARDNER wrote:
> Hello,
>
> When using EMC2 with stepper motors and software generated steps the highest
> step rate seems to be limited by the computer latency. We have a clear
> formula to calculate that rate based on the stepper driver requirements and
> the computer latency.
>
> How do we
Hello,
I made a new try.
First, I have installed an unpatched Ubuntu 8.04 LTS (64bit). This
works, without errors! In next step I installed EMC2 (by using the
script). But my pc did not start up with the RTAI- Kernel:
-
Don't forget the latency of the opto couplers in the breakout boards...
That messed me up once. They were slow and the speed was high...
At a certain range VERY bizarre inaccuracies started to creep in and
it took me some time to figure out why the heck things went the way
they did.
Needless to say
Let's take the case of a 5i20 board running hostmot2.
hostmot2 uses a DDS algorithm and tracks the low 16 bits of the step
count.
Every servo cycle emc reads the step count from the board then sends a
new frequency command to the board.
hostmot2 uses a DDS algorithm based on a 33MHz clock. This
With hardware step generators like the Mesa and Pico, emc2 sends a "desired
step frequency" command every millisecond or so (and reads from the hardware
how many steps it's actually taken since last time). The step signals are
generated on the 5i20 or similar, at the requested frequency, and se
Hello,
When using EMC2 with stepper motors and software generated steps the highest
step rate seems to be limited by the computer latency. We have a clear formula
to calculate that rate based on the stepper driver requirements and the
computer latency.
How do we calculate the highest step rate
I have the same problem. Jeff, have you solved it?
Any help will be very appreciated
Thanks
Jeff Ottesen wrote:
> Hello,
>
> I have been looking for information regarding homing a dual drive gantry.
> From what I can tell, the Integrator manual does not specifically cover
> homing of a dual
