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General Mach Discussion / Re: Closed loop control using encoders?
« on: September 09, 2010, 04:02:33 PM »
No and No
There is a board you can buy which does the first thing, well sort of, it wont pause and update then carry on. What it will do is fault Mach and then update DROs to encoder position. But is this useful? probably not as you have lost position by the amount of following error you have set up, this has probably ruined your work anyway if you are using a metal cutting machine with fairly tight tolerances, on a router the tolerances in your work are normally less so it may help.
Having said that you need to think why you are losing position and it all comes down to one thing if it is a regular occurrence, that thing is the motors are not big enough for the task you are asking them to do.
Now your second part, Mach is a buffered system so software closed loop is not possible.
Hood
There is a board you can buy which does the first thing, well sort of, it wont pause and update then carry on. What it will do is fault Mach and then update DROs to encoder position. But is this useful? probably not as you have lost position by the amount of following error you have set up, this has probably ruined your work anyway if you are using a metal cutting machine with fairly tight tolerances, on a router the tolerances in your work are normally less so it may help.
Having said that you need to think why you are losing position and it all comes down to one thing if it is a regular occurrence, that thing is the motors are not big enough for the task you are asking them to do.
Now your second part, Mach is a buffered system so software closed loop is not possible.
Hood