Digital servo
Posted by
Arne Chr. Jorgensen
on 1999-09-21 03:29:30 UTC
Hi,
Bertho Boman:
Yes, I do understand your point. It is a good one, and there is
several solutions to it, - but I think you need to make some
compromises. Some of what you suggest, is more difficult than what
you would gain. ( IMHO ) But if you should follow up this idea,
then you are so close to making an adaptive system, - it would be
stupid not to check it out. What you gain is tenfold what you would
get from a normal design, and all of this is already put into the
EMC. That is why EMC can run a hexapod or any other kind of
machine. But I don't know what the experts would say. So if you
first would undertake the job of making a digital servo, why not
make it something better. All you may need is a few changes of
code, and a specified way to talk to this servo. This is something
you had to do anyway, if it should interface with the EMC - so I
think it is stupid not to find out what would be needed.
If not, then I would just do some compromises, and forget some of
the features you propose, and it would still be great.
At the moment I don't have any working servo, and I am into some
thinking. By the way - Jon - , thank you for your answer. There is
a few other ways to do things, with a modified PWM type of
controller. I mess up things, and you put me back on the ground !
:)
This leads me into another subject. I am very grateful for any
answers from Jon. He is gentle and kind enough to answer, even some
of our stupid questions. I would have build Jon's servo a long time
ago, I think, - but he knows and I know that I might modify his
design. I would rather be without a servo, then do any harm to his
interests. So I am looking at other ways to get something I can play
around with, and do with as I please.
If that happens, then I will evaluate what I think could be done in
a digital direction, - what I need is to play around with the EMC
and see what would be possible to do. I have done a few things, in
an effort to do something for all of us, and I just have to wait to
see if it will pay off.
Best wishes,
//ARNE
Bertho Boman:
Yes, I do understand your point. It is a good one, and there is
several solutions to it, - but I think you need to make some
compromises. Some of what you suggest, is more difficult than what
you would gain. ( IMHO ) But if you should follow up this idea,
then you are so close to making an adaptive system, - it would be
stupid not to check it out. What you gain is tenfold what you would
get from a normal design, and all of this is already put into the
EMC. That is why EMC can run a hexapod or any other kind of
machine. But I don't know what the experts would say. So if you
first would undertake the job of making a digital servo, why not
make it something better. All you may need is a few changes of
code, and a specified way to talk to this servo. This is something
you had to do anyway, if it should interface with the EMC - so I
think it is stupid not to find out what would be needed.
If not, then I would just do some compromises, and forget some of
the features you propose, and it would still be great.
At the moment I don't have any working servo, and I am into some
thinking. By the way - Jon - , thank you for your answer. There is
a few other ways to do things, with a modified PWM type of
controller. I mess up things, and you put me back on the ground !
:)
This leads me into another subject. I am very grateful for any
answers from Jon. He is gentle and kind enough to answer, even some
of our stupid questions. I would have build Jon's servo a long time
ago, I think, - but he knows and I know that I might modify his
design. I would rather be without a servo, then do any harm to his
interests. So I am looking at other ways to get something I can play
around with, and do with as I please.
If that happens, then I will evaluate what I think could be done in
a digital direction, - what I need is to play around with the EMC
and see what would be possible to do. I have done a few things, in
an effort to do something for all of us, and I just have to wait to
see if it will pay off.
Best wishes,
//ARNE