RE: [CAD_CAM_EDM_DRO] Re: Rotary axis configuration question.

Al,

In this case it is 2000 steps per revolution with the CMD-260 drivers in
2000 step per rev micro step mode so 400 * 360 = 144400 steps per rotary
table revolution. My problem is I don't know how to get EMC to understand
that this axis is working in degrees and not inches or mm. I have the axis
configured as shown below:

[AXIS_3]

TYPE = ROTARY
UNITS = 1
HOME = 0.000
MAX_VELOCITY = 1.2
P = 1000.000
I = 0.000
D = 0.030
FF0 = 0.000
FF1 = 0.077
FF2 = 0.000
BACKLASH = 0.000
BIAS = 0.000
MAX_ERROR = 0.000
DEADBAND = 0.000
CYCLE_TIME = 0.001000
INPUT_SCALE = -144000
OUTPUT_SCALE = 144000 0.000
MIN_LIMIT = -360.0
MAX_LIMIT = 360.0
MIN_OUTPUT = -360
MAX_OUTPUT = 360
;FERROR = 1.000
;MIN_FERROR = 0.01
HOMING_VEL = 0.1
HOME_OFFSET = 0.0
ENABLE_POLARITY = 0
MIN_LIMIT_SWITCH_POLARITY = 0
MAX_LIMIT_SWITCH_POLARITY = 0
HOME_SWITCH_POLARITY = 1
HOMING_POLARITY = 1
JOGGING_POLARITY = 1
FAULT_POLARITY = 1


Any help will be appreciated. I can use it with TurboCNC but I would like
to use it with EMC also.

John Guenther
Sterling, Virginia

> -----Original Message-----
> From: alenz2002 [mailto:alenz@...]
> Sent: Saturday, June 29, 2002 13:37
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Rotary axis configuration question.
>
>
> John,
> Something oesn't look right with those numbers. Here is my setup
> with the Sherline rotary. The steppers are 1.8 deg/step or 200
> steps/stepper revolution. I am using half step so get 400 steps per
> stepper revolution. One stepper revolution is 5 degrees on the
> rotary table, so that is 400/5 = 80 steps/deg. (Or 80 * 360 = 28,800
> steps per rotary table revolution.)
> Hope this helps,
> Al Lenz
>
>
> --- In CAD_CAM_EDM_DRO@y..., "John Guenther" <j.guenther@v...> wrote:
> > Good Morning,
> >
> > I received a Sherline CNC rotary table for my birthday on Friday,
> and now I
> > am trying to configure EMC to work with it. My question is, do you
> > configure it for the number of steps per degree or the number of
> steps for
> > one complete rotation? In the case of my setup with the Sherline
> rotary
> > table, it is 144000 steps per 360 degree rotation or 400 steps per
> degree.
> >
> > As I have it currently configured if I issue the command g0 a1 it
> will
> > rotate the table one complete revolution.
> >
> > John Guenther
> > Sterling, Virginia
>
>
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