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General Mach Discussion / Z axis incorrect
« on: February 06, 2015, 08:06:20 AM »
hello everyone
iv dusted off my old machine and am going to have another go at trying to get to know it better
with a few trial runs iv found that i am loosing depth of cut to what i have programmed. ie programmed to cut to a depth of 6mm but actual final cut was only 4.24mm
process of elimination.
i first check the Z movement (distance) in mach to the actual movement (distance) of the spindle.
i set the base of the spindle 55mm from the bed zeroed the Z axis and then lifted the spindle 45mm on the z counter on mach
that should have ment that the spindle should be a total 100mm from the bed, it wasnt, it was 89mm off the bed, a loss of 11mm
the machine is a 6040 chinese cnc
according to the specs sheet the ball screws are dia 16mm with a pitch of 5 mm
the motors are 387 oz motors from Homann supplies (with a lot of outside help i changed the moter rewired and fitter G540 stepper controlers to it)
the info/help i am after is what should the correct configeration be, for this setup, and were in mach do i change the settings
thankyou in advance for any feed back that maybe provided.
cheers Tony
iv dusted off my old machine and am going to have another go at trying to get to know it better
with a few trial runs iv found that i am loosing depth of cut to what i have programmed. ie programmed to cut to a depth of 6mm but actual final cut was only 4.24mm
process of elimination.
i first check the Z movement (distance) in mach to the actual movement (distance) of the spindle.
i set the base of the spindle 55mm from the bed zeroed the Z axis and then lifted the spindle 45mm on the z counter on mach
that should have ment that the spindle should be a total 100mm from the bed, it wasnt, it was 89mm off the bed, a loss of 11mm
the machine is a 6040 chinese cnc
according to the specs sheet the ball screws are dia 16mm with a pitch of 5 mm
the motors are 387 oz motors from Homann supplies (with a lot of outside help i changed the moter rewired and fitter G540 stepper controlers to it)
the info/help i am after is what should the correct configeration be, for this setup, and were in mach do i change the settings
thankyou in advance for any feed back that maybe provided.
cheers Tony