Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa

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6 years 4 months ago #170442 by bbsr_5a
Replied by bbsr_5a on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
and give the MIN a slight negative -0.1 to get the interpreter to a better calculation
Code:
TYPE = LINEAR HOME = 550.0 MAX_VELOCITY = 200.0 MAX_ACCELERATION = 1200.0 STEPGEN_MAXACCEL = 2000.0 SCALE = 100.0 BACKLASH = 0.00 FERROR = 1 MIN_FERROR = .25 MIN_LIMIT = -1.0 MAX_LIMIT = 570.5 HOME_OFFSET = 570.0 HOME_SEARCH_VEL = 40.0 HOME_LATCH_VEL = 5.0 HOME_FINAL_VEL = 15.0 HOME_SEQUENCE = 1

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6 years 4 months ago #170448 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Success!
Thank you all for your homing support.

The main problem was solved with HOME_IGNORE_LIMITS = True. After this I could start to config homing as I wanted it, and now it kind of works. I need to tweak speed/accel a bit.

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6 years 4 months ago #170450 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Is there a concept for trying out a suitable acceleration for the machine? Max speed is in the machine spec, but acceleration needs to be tested. Do I need to tweak the ini file and restart LNCNC each time?

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6 years 4 months ago #170451 by bbsr_5a
Replied by bbsr_5a on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
if it is posible for you please get the code you ended up here
not the intirer ini only the section like i did it above AXIS/Joint configuration of all involves XYZA

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6 years 4 months ago #170457 by tommylight
Replied by tommylight on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Check the "calibration" form the "machine" menu, it should have everything that can be edited/tuned without restarting LinuxCNC.

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6 years 4 months ago #170458 by rodw
Replied by rodw on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
The maths behind calculating acceleration is complex so trial and error is the go. There is a component called sim_pin which you can install from your INI file that opens up a little window that allows you to edit ini file settings on the fly. Now I know of it I would use that when setting up a new machine. When you start to loose steps, back off about 15-20%

linuxcnc.org/docs/2.8/html/man/man1/sim_pin.1.html

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6 years 4 months ago #170459 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Code:
[AXIS_X] MIN_LIMIT = -0.1 MAX_LIMIT = 570.1 MAX_VELOCITY = 200 MAX_ACCELERATION = 500 [AXIS_Y] MIN_LIMIT = -0.1 MAX_LIMIT = 1010 MAX_VELOCITY = 200 MAX_ACCELERATION = 500 [AXIS_Z] MIN_LIMIT = -109 MAX_LIMIT = 0.1 MAX_VELOCITY = 30 MAX_ACCELERATION = 400 [JOINT_0] AXIS = Y MIN_LIMIT = -0.1 MAX_LIMIT = 1010 MAX_VELOCITY = 200 MAX_ACCELERATION = 500 TYPE = LINEAR SCALE = 200 STEPGEN_MAX_VEL = 240.0 STEPGEN_MAX_ACC = 600.0 FERROR = 0.0051 MIN_FERROR = 0.0025 DIRSETUP = 20000 DIRHOLD = 20000 STEPLEN = 5000 STEPSPACE = 5000 DEADBAND = 0 P = 1000 I = 0 D = 0 FF0 = 0 FF1 = 1 FF2 = 0.00013 BIAS = 0 MAX_OUTPUT = 0 MAX_ERROR = 0.0127 HOME = 10 HOME_OFFSET = 0 HOME_SEARCH_VEL = -30 HOME_LATCH_VEL = -5 HOME_SEQUENCE = 0 HOME_USE_INDEX = False HOME_IGNORE_LIMITS = True [JOINT_1] AXIS = X MIN_LIMIT = -0.1 MAX_LIMIT = 570.1 MAX_VELOCITY = 200 MAX_ACCELERATION = 500 TYPE = LINEAR SCALE = 200 STEPGEN_MAX_VEL = 240.0 STEPGEN_MAX_ACC = 600.0 FERROR = 0.0051 MIN_FERROR = 0.0025 DIRSETUP = 20000 DIRHOLD = 20000 STEPLEN = 5000 STEPSPACE = 5000 DEADBAND = 0 P = 1000 I = 0 D = 0 FF0 = 0 FF1 = 1 FF2 = 0.00013 BIAS = 0 MAX_OUTPUT = 0 MAX_ERROR = 0.0127 HOME = 500 HOME_OFFSET = 570 HOME_SEARCH_VEL = 60 HOME_LATCH_VEL = 5 HOME_SEQUENCE = 0 HOME_USE_INDEX = False HOME_IGNORE_LIMITS = True [JOINT_2] AXIS = Z MIN_LIMIT = -109 MAX_LIMIT = 0.1 MAX_VELOCITY = 30 MAX_ACCELERATION = 400 TYPE = LINEAR SCALE = 333.3333 STEPGEN_MAX_VEL = 36.0 STEPGEN_MAX_ACC = 480.0 FERROR = 0.0051 MIN_FERROR = 0.0025 DIRSETUP = 20000 DIRHOLD = 20000 STEPLEN = 5000 STEPSPACE = 5000 DEADBAND = 0 P = 1000 I = 0 D = 0 FF0 = 0 FF1 = 1 FF2 = 0.00013 BIAS = 0 MAX_OUTPUT = 0 MAX_ERROR = 0.0127 HOME = -10 HOME_OFFSET = 0 HOME_SEARCH_VEL = 30 HOME_LATCH_VEL = 5 HOME_SEQUENCE = 0 HOME_USE_INDEX = False HOME_IGNORE_LIMITS = True

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6 years 4 months ago #170463 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Thank you @rodw, I'll try sim-pin. I tried the calibration tool, but I didn't have the patience to look up the math.

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6 years 4 months ago #170466 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Next question for this super-supportive forum:

Where can I find the mapping between the actual pins on the 7i96 and the gpoi_nn pins in HAL? More specifically I need to know which gpio-pin is related to out01 and out02 on the board.

EDIT:
Found the pins.
hm2_7i96_0.ssr.00.out-00
hm2_7i96_0.ssr.00.out-01

It would be great if someone could link me to a document with the pin naming anyway

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6 years 4 months ago #170469 by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
7i96 Configuration Tool has a spindle tab. I'm using firmware 4+1, so the spindle PWM should be at hm2_7i96.0.pwmgen.00.value.

This pin does not get connected by the config tool. I can set it manually to turn the spindle. To what signal should I connect the PWM?

Also, how do I know what spindle frequency to set in the config? Default seems to be 20000, which didn't work. 5000 works.

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