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General Mach Discussion / Re: calibration problems need help please!
« on: April 04, 2006, 12:06:03 PM »
Sid
You need to move in the same direction, an amount greater than the backlash before you start your actual measurment move. Lets try an example as it is probably easier to see. Lets look at the X axis which has say 0.5mm of backlash.
Initial postion is X27 - random number I came up with !
Now move in the -Ve direction i.e. G0 x-10
We now need a +ve move to remove the backlash i.e. G0 x0
The backlash is now removed
Now start the measurment move e.g. G0 x50 (+ve move)
Make a note of the measurment - you now need to go back to G0 x-10
then G0 X0 (remove backlash again)
Now change the step settings (you don't need to remove the backlash as you already have!)
repeat over and over until your happy.
The important thing is that where you change direction you need to do two moves, first to remove backlash, second the actual measurment.
Any more probs just shout
Cheers
Dave
You need to move in the same direction, an amount greater than the backlash before you start your actual measurment move. Lets try an example as it is probably easier to see. Lets look at the X axis which has say 0.5mm of backlash.
Initial postion is X27 - random number I came up with !
Now move in the -Ve direction i.e. G0 x-10
We now need a +ve move to remove the backlash i.e. G0 x0
The backlash is now removed
Now start the measurment move e.g. G0 x50 (+ve move)
Make a note of the measurment - you now need to go back to G0 x-10
then G0 X0 (remove backlash again)
Now change the step settings (you don't need to remove the backlash as you already have!)
repeat over and over until your happy.
The important thing is that where you change direction you need to do two moves, first to remove backlash, second the actual measurment.
Any more probs just shout
Cheers
Dave