I would go with analog. It is much easier to tune using Halscope than
trying to tune the drives by ear or relying on auto tuning which in my
experience doesn't work very well. Additionally if you get drive faults
due to following errors it is much harder to figure out what is going
on. With LinuxCNC handling the PID loop you can use Halscope to see
exactly what is going on. Being able to actually see what is going on is
so useful when trying to track down problems.
About a year ago I retrofitted a router with pulse controlled brushless
servos, using Eding CNC instead of LinuxCNC. I spent ages on that
machine tracking down intermittent following error trips. As it turned
out the problem was actually a bug in Eding CNC but even then, if I had
access to tools like Halscope I would have found the problem within
hours rather than weeks. Unfortunately the customer did not want
anything to do with Linux.
Les
Hi
I have to upgrade and convert an old machine that was used to cut with
gas. It uses some Panasonic MCDHT3520 servo drives.
These drives has a pulsed input for position and an analog +- 10v input
for velocity mode.
The question is what mode is better to use with LCNC and Mesa cards,
velocity or position?
I will use one of the Ethernet solutions from Mesa with a panel PC.
-----------------------------
Regards / Groete
Marius D. Liebenberg
+27 82 698 3251
+27 12 743 6064
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