The Ram stopped at top safety point and the sensor is at ON status , then you pressed the Zero return (Home) button , the Y axis coordinate display on monitor change but Y axis not move at all.
Y axis coordinate display change , it means the command was sent out to PLC , Y axis mot move mean – PLC don’t send command to Y axis Delta servo driver correctly , you need to check the connection between PLC connector to Delta servo driver connector , maybe connector don’t connect well.
Open the electric box and turn on power , then switch at manual , then use MPG to move the Y axis , normally the Y axis servo driver display must change , not always”0” , If Y axis servo driver always at “0” , It means the PLC command don’t send to Y axis servo driver , You need to solve the PLC to Y axis servo driver transmission , You can take a detailed photo showing the PLC connector , then our engineer can check the connecting is correct or not ?
When you use MPG to move Y axis , please also check the Monitor display , normally the Y axis coordinate should change value , it means command is sent to PLC correctly , It means command to PLC is OK. , The problem is PLC to servo driver.
If you turn MPG to move Y axis , if Y axis servo driver happen error alarm , it means the servo driver to servo motor happen problem , you need check the encoder between motor to driver and power between driver to motor end connection.
Please take a complete and detailed video to show our engineer for problem solving.