On Friday 31 August 2007, [EMAIL PROTECTED] wrote:
>Hi Patrick,
>
>I recently added a rotary axis to my little mill and didn't have any
>problems - maybe I didn't think about it enough... ;-)
>Anyway, if its of any use to you, here is the relevant bits of my ini
>file....
>
>[TRAJ]
>#+ machine specific settings
>
>STEPGEN_MAXACCEL = 396.0
>AXES = 4
># COORDINATES = X Y Z R P W
>COORDINATES = X Y Z A
>HOME = 120 0 90 0
>LINEAR_UNITS = metric
>ANGULAR_UNITS = degree
>CYCLE_TIME = 0.010
>DEFAULT_VELOCITY = 1.2
>DEFAULT_ANGULAR_VELOCITY = 20
>MAX_VELOCITY = 1.4
>MAX_ANGULAR_VELOCITY = 20.5
>DEFAULT_ACCELERATION = 3
>MAX_ACCELERATION = 4
>
>############################################################################
>### # Axes sections
>############################################################################
>###
>
>;
>;
>;
>
>#+ Fourth axis
>[AXIS_3]
>
>TYPE = ANGULAR
>HOME = 0.0
>MAX_VELOCITY = 20.0
>MAX_ACCELERATION = 10.0
>STEPGEN_MAXVEL = 20.5
>STEPGEN_MAXACCEL = 39.0
>BACKLASH = 0.000
>INPUT_SCALE = 100
>OUTPUT_SCALE = 1.000
>MIN_LIMIT = -36000.0
>MAX_LIMIT = 36000.0
>FERROR = 5.0
>MIN_FERROR = 1.0
>HOME_IS_SHARED 1
>HOME_SEQUENCE 3
>HOME_OFFSET = 0.0
>HOME_SEARCH_VEL = 7
>HOME_LATCH_VEL = -2
>HOME_USE_INDEX = NO
>HOME_IGNORE_LIMITS = NO
>
>and the pins bit of hal....
>
># finally connect physical pins to the signals
>linksp Xstep parport.0.pin-03-out
>linksp Xdir parport.0.pin-02-out
>linksp Ystep parport.0.pin-05-out
>linksp Ydir parport.0.pin-04-out
>linksp Zstep parport.0.pin-07-out
>linksp Zdir parport.0.pin-06-out
>linksp Astep parport.0.pin-14-out
>linksp Adir parport.0.pin-16-out
>
>I haven't set up my limit switches yet on any of the axes as, for what I
>do, they seem to often get in the way and give me 'limits exceeded' errors.
>
>My machine is home built and the rotary axis uses a 90:1 worm and wheel
>driven by a 200 step stepper in half step mode. HTH
Thanks Ian, this fills in several blanks in the config I tried to build. I'm
in the middle of carving some big (for that mill) bearing support blocks for
mine ATM, but I'll check this out when I can afford to lose my locations. I
have some smaller 50oz motors I can rig with a belt drive to fit that little
4" table, so I see more construction in my future after I get the 2nd
replacement Z setup installed on my micromill. I also noted the x axis seems
to have worn some play in the thrust bearing, so that will need attacked at
some point using a smaller version of this same axial load ball bearing.
What drivers are you using? xylotex here, unforch, 3 axis so I'll have to rig
something or get the bigger 4 axis board.
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The hope that springs eternal
Springs right up your behind.
-- Ian Drury, "This Is What We Find"
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