Gantrykins G0 Z axis max speed

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16 Nov 2017 15:55 #101901 by alexMV
Hello! I have a problem with my 3-axis gantrykins machine. X and Y have max speed 15000 mm/min (rack and pinion), Z just 4000 mm/min (ball screw). I wrote the same MAX_VELOCITY for each axis, but when I do G0 the machine drives Z with max speed 15000 mm/min (MAX_LINEAR_VELOCITY ). How to solve this problem?
Thanks!

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16 Nov 2017 20:50 #101908 by rodw
Replied by rodw on topic Gantrykins G0 Z axis max speed
In your ini file, change this for your Z Axis
[AXIS_Z]
MAX_VELOCITY     =  66.667

it is in mm/second not per minute so 4000/60 = 66.667

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17 Nov 2017 13:36 #101930 by alexMV
In ini file I have already write MAX_VELOCITY=66.667 for Z and 250 for X and Y. When I run G0 code the machine do this command with max speed by X/Y=15 m/min and Z=15 m/min despite Z speed limit. This problem appears only in gantrykins. When I try to control the machine in trivkins all is well. How to set Z speed limit correctly in gantrykins?

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20 Nov 2017 17:18 #102072 by andypugh
You should consider switching to version 2.8 and using the gantry-compatible trivkins there.

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