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LinuxCNC
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General LinuxCNC Questions
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Gantry machine progress
Gantry machine progress
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31 Jul 2017 14:00 - 31 Jul 2017 14:08 #96773
by Yannis
the motors are attached to ball screws and they must turn in the same direction(for the time they are unhooked from the pulleys)
Last edit: 31 Jul 2017 14:08 by
Yannis.
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31 Jul 2017 14:34 #96775
by andypugh
If it is a following error then that seems to indicate that the feedback position and the commanded position are not the same.
Check that both motors spin the same direction when homing (maybe make the following error limits much higher in the INI, only for testing) and that the encoders count in the same direction
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31 Jul 2017 15:17 #96780
by Yannis
o.k i will check that tomorrow
as i mention in the beginning of this post my machine is a x y y z c gantry router
how can i change the A axis letter with C at the display of the axis
thanks for the help
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31 Jul 2017 15:46 - 31 Jul 2017 15:46 #96782
by andypugh
how can i change the A axis letter with C at the display of the axis
thanks for the help
This is configured by a combination of the [DISPLAY]COORDINATES and [TRAJ]COORDINATES INI file settings.
Last edit: 31 Jul 2017 15:46 by
andypugh.
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01 Aug 2017 05:48 - 01 Aug 2017 05:48 #96808
by Yannis
This is the latest INI ad HAL files i try to change the values from A to C.In the display is C now but when i try try to jog C axis Z axis is moving.
i notice and something else: in the y0 motor if i rotate 1 turn the axis i see in the display very large movement.I the manual i reed that the encoder of the motor is 2000 resolution
Last edit: 01 Aug 2017 05:48 by
Yannis.
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01 Aug 2017 05:56 #96809
by Yannis
i rotate the joint 1 motor and the joint 0 motor 1 rotation and the values at the display was completely different even tho the settings for the encoder is the same
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01 Aug 2017 09:56 #96816
by andypugh
I rotate the joint 1 motor and the joint 0 motor 1 rotation and the values at the display was completely different even tho the settings for the encoder is the same
It sounds like you have confused the mapping between joints and axes.
Maybe make a table of which joint is which axis, and which encoder and pwm/analog corresponds to each joint.
(It is entirely valid to have joint 0 control the Z axis using encoder 2 and PWM 1. Though somewhat confusing).
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01 Aug 2017 11:01 #96826
by Yannis
i have the same encoder scale for the 2 motors(800encoder scale)
they sud count the same value per rotation
after one rotation of motor axis the one count 10mm(witch is the right value) and the other one is count 26885-19587=7298mm
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LinuxCNC
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General LinuxCNC Questions
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Gantry machine progress
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