On 7/29/15 6:55 AM, Jullian wrote:
> Hi, all:
>
> Now, i am reading the stepgen.c file, and i have some doubts:
>
> (1)what're the main steps to transform from the position offset to pulses?
The best description of how stepgen.c does is probably the source, and
this documentation:
http://linuxcn
Hi, all:
Now, i am reading the stepgen.c file, and i have some doubts:
(1)what're the main steps to transform from the position offset to pulses?
(2)what's the main effect of make_pulse() , update_freq() and update_pos()?
(3)can anyone explain the meaning of Line748:(accum_a-(1<< (PICKOFF-1)))
On 26 July 2015 at 10:03, Jullian wrote:
> As far as i have read, in the stepgen.c, the function of make_pulses() just
> processs
> the time of periodns. and i cannot find the code processing the position
> offset.
That is done by the capture-position HAL function, which calls the
update_pos C-f
Hi all,
As far as i have read, in the stepgen.c, the function of make_pulses() just
processs
the time of periodns. and i cannot find the code processing the position
offset.
Does anyone know where's the code about the position offset?
Best regards!
---
Mario,
Can you provide some references for the current control of the phase coils? I
think that would interesting for reference...
EBo --
"Mario." said:
> --0016e6d77ed3d8b6420480862da9
> Content-Type: text/plain; charset=UTF-8
>
> Dave: I already have the analog output driver made and it
Dave: I already have the analog output driver made and it makes a real
difference. The motor is quiet. At 2000usteps/revolution, when spinning
Shinano Kenshi SST83D1C011 motor slowly, you can see every movement clearly.
I reconnected the windings inside to be only bipolar, to get lower losses
and
I hate step/dir as it make a lot of overhead if software stepgen is
used. (set new direction, wait proper time, make step signal active,
wait again, relase step signal . wait, wait)
For that reason the best is 2 phase (quadrature) just change and forget.
Let's stay on original problem/f
Once you get much beyond 10 microsteps you are pretty much wasting your
time with more. There is no increase in actual mechanical resolution.
The trick is that step and direction is a "standard" and unless you are
making your own drivers reinventing the wheel is probably not very useful.
I
Gray code is good. I use HalfStepping with both pases on. Similar as
used in linistepper. But if I use lines directly there is not enougth
pins on lpt port. As I use old laptop and can't instal new one I manage
that in reality I need only 3 bits and simple xor gate (74HC86). The
drive is comple
I had a similar idea long time ago, and I implemented it in the file, but
never used. Not yet.
First of all, the output encoding should use GRAY CODE format!
In other words, quadrature output in 2-bit gray code. Between any two
adjacent positions, there is only SINGLE bit change.
Also, gray codes
Hello...
I'm already post that question/wish on the linuxcnc forum and I got
response that here is the right place to ask that. Se here is copy.
;--
Hello...
I'm have homemade stepper driver and have phase inputs. The inpu
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