Hello,
That's a pretty impressive bridge :-) I intend to use SiC FETs, mainly
because I want to use the drive as a power supply as well. With SiC FETs
the inductor become much smaller and cheaper.
Mark.
Rene Hopf <reneh...@mac.com> wrote:
Hi,
Interesting Project!
Im also working on a servo amp which supports hiperface, mitsubishi abs
encoders, and many other protocols, and also resolvers.
https://github.com/rene-dev/stmbl
this is the mistubishi encoder code:
https://github.com/rene-dev/stmbl/blob/newstuff-v4/src/comps/encm.comp
currently we use smartserial as command via a mesa card, but we a also
working on a ethernet version.
the idea is some udp based protocol like the mesa cards use, but that
is still in development.
at the moment we are working to get version 4 of our hardware working,
a lot of code needs to be done.
https://www.dropbox.com/s/axa2u1sy6j62hp7/2016-12-13%2001.57.41.jpg?dl=0
https://www.dropbox.com/s/h2sby9pc4mfvdv8/2016-12-13%2001.57.27.jpg?dl=0
https://www.dropbox.com/s/citvmronmz9ryrt/2016-12-10%2021.12.50.jpg?dl=0
some projects powered by stmbl:
https://www.youtube.com/watch?v=wXLcAZwjlzE
https://www.youtube.com/watch?v=gwgnAeGjZrA
https://www.youtube.com/watch?v=uMytcf41GPU
https://www.youtube.com/watch?v=pMZQ4q7iM20
Rene
> On 05 Feb 2017, at 15:37, mark.vandoesb...@hetnet.nl wrote:
>
> I've been working on an ethernet controlled servo drive for some time
now.
> This drive uses RTNET and Xenomai-3.0.3 for the real-time
communication.
> The current control loop is on the drive, but the position control
loop
> is on the PC.
>
> Currently only tree motor types are supported, being Mitsubishi MF-S13
> Mitsubishi HC-PQ-[24]3 and the Osai DS-56. The Osai motor uses a
> Hiperface encoder, so supporting another motor with Hiperface should
be
> a simple change of the encoder offset and number of poles.
>
> Since the drives have to be synchronised to the PC it is important to
> reduce the jitter to the drives. To do this I have made two
modifications
> to the uspace_xenomai interface. The first is that a posix timer is
used
> to generate the control frequency. The second is that the real-time
> synchronisation function needs access to this timer. (Eventually this
> has to be replaced by PTP)
>
> Another change has to do with permissions, I'm not sure what the
proper
> fix is so there's a hack in there to do everything as root.
>
> The sources for the drive are at:
> https://github.com/mark-v-d/motor_control.git
>
> The patched linuxcnc version is at:
> https://github.com/mark-v-d/linuxcnc.git
>
> Please keep in mind this is all work in progress. The hardware needs
> a few patches (notes in the schematic) and the software is nowhere
near
> complete. As soon as I've got everything working I'm going to make
another
> drive which works at 600V, and support at least the AEAT-6010/6012
> and AEAT-9000-1GSH1 encoders.
>
> regards,
>
> Mark.
>
>
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