homing problem in gantry mode

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6 years 6 days ago #187187 by jasen
homing problem in gantry mode was created by jasen
Hi , I have the folowing peoblem , the machine is gantry with 2 motors on Y axis. At startup when you go to homing procedure you can select independant axis or homing sequence ( not yet in joints)
The problem is that if in this moment you select to hoe Y axis (the gantry one) only one of the motors starts as is not in joint mode yet.The result is brocken machine. Haw to solve it. ?

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6 years 6 days ago #187194 by newbynobi
Replied by newbynobi on topic homing problem in gantry mode
Wrong homing sequence in your INI File?
Do both Y Joints have a negative value of the homing sequence? like so?
Code:
[AXIS_Y] MAX_VELOCITY = 80 MAX_ACCELERATION = 200 MIN_LIMIT = 0 MAX_LIMIT = 2000 [JOINT_1] TYPE = LINEAR MAX_VELOCITY = 200 MAX_ACCELERATION = 1000 MIN_LIMIT = 0 MAX_LIMIT = 2000 HOME = 0.0 HOME_OFFSET = 0.0 HOME_SEARCH_VEL = 0 HOME_LATCH_VEL = 0 HOME_SEQUENCE = -2 [JOINT_2] TYPE = LINEAR MAX_VELOCITY = 200 MAX_ACCELERATION = 1000 MIN_LIMIT = 0 MAX_LIMIT = 2000 HOME = 0.0 HOME_OFFSET = 0.0 HOME_SEARCH_VEL = 0 HOME_LATCH_VEL = 0 HOME_SEQUENCE = -2

Norbert

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6 years 5 days ago #187205 by jasen
Replied by jasen on topic homing problem in gantry mode
nope , in sequence homing everiting is ok , it happend only when you try to home only the gantry axis , in my case is Y. when you push the home all , it works ok.

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6 years 5 days ago #187206 by Clive S
Replied by Clive S on topic homing problem in gantry mode

jasen wrote: nope , in sequence homing everiting is ok , it happend only when you try to home only the gantry axis , in my case is Y. when you push the home all , it works ok.


I think that is normal with gantry homing

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6 years 5 days ago #187224 by rodw
Replied by rodw on topic homing problem in gantry mode
In you ini file
Code:
KINEMATICS = trivkins coordinates=XYYZ kinstype=BOTH

change to
Code:
KINEMATICS = trivkins coordinates=XYYZ

This removes the ability to jog in world mode so you have to home all before doing anything.

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6 years 5 days ago #187278 by newbynobi
Replied by newbynobi on topic homing problem in gantry mode
@jasen,

So does your INI file have a negative homing sequence for your Y axis? If so, pushing the home Y button should home both y joints.
This does not have anything to do with the home all behavior, as this will home all joints at once!

Post your relevant part of your INI File.

Norbert

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6 years 4 days ago #187327 by jasen
Replied by jasen on topic homing problem in gantry mode
Hi Norbert , yea , the issue was the negative home sequence , didnt see that. now is ok. But I have another question for the spindle scale. it works exact with the g-code commands , but the bar is not ok. before homing it works different than after. the spindle is standart 24000 rpm controled with 10v analog

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