leftyrowe
10-24-2006, 04:11 PM
What is involved in fixing a encoder problem on the Series II r2e3 boss 8 mill ?
a service teck informed me that the encoder was out on the x axis.
What is the method of checking for this and what is the fix.
and are parts still avialable? and at what extimated price?
thanks
Richard
unterhaus
10-24-2006, 07:48 PM
My first inclination is to suspect wiring, either on the way to the encoder, or internal to the encoder. Did he verify the wiring to the encoder was intact?
machintek
10-25-2006, 12:09 AM
Encoders can fail in more than one way. You can lose the marker pulse which occurs once per revolution and allows a machine to home. You can lose one of the channels use for position. Most encoders have a small bulb and are considered optical. This can burn out or silver the inside of the bulb to the point where it cannot count.
Typically I use a 5VDC power supply, a drill and an oscilliscope to check a encoder.
George
unterhaus
10-25-2006, 01:36 AM
Typically I use a 5VDC power supply, a drill and an oscilliscope to check a encoder.
George
George, what size drill bit?
Are these old enough to have a bulb? I assumed they were new enough to have LEDs in them.
leftyrowe
10-25-2006, 07:36 AM
My first inclination is to suspect wiring, either on the way to the encoder, or internal to the encoder. Did he verify the wiring to the encoder was intact?
the serviec tech said that he swaped the x and y servo motors. he said that the encoder on the motor needed replacing.
does this sound correct?
and what would be involved in the cost and fix of the encoder?
thanks
Richard
leftyrowe
10-25-2006, 07:38 AM
My first inclination is to suspect wiring, either on the way to the encoder, or internal to the encoder. Did he verify the wiring to the encoder was intact?
the service tech said that he swaped the x and y servo motors. he said that the encoder on the motor needed replacing.
does this sound correct?
and what would be involved in the cost and fix of the encoder?
thanks
Richard
machintek
10-25-2006, 08:12 AM
I use the drill to turn the encoder, the power supply to power it and the scope to watch the waveform.
Swapping a motor eliminates the entire circuit for that motor and leaves only the motor suspect. Very common for service techs to do if they don't have sophisticated equipment.
If the motor moves then it leaves how it moves and if it counts. If it moves correctly then the tach and armature are good. Lastly it leaves the encoder.
George