Hi everybody!
Anyone pls help me in my machine trouble.
-We just buy used 3 axes milling machine with Fanuc 16i-MA controller, after install mc, alarm 300 (APC alarm) X, Y, Z needed to reference return (at first Power ON) (although we never disconnect motor or encoder). I try to manual ref return and completed with X and Z. But Y axis homing always end with alarm 90 ref return incomplete (machine use abs encoder and linear scale for all axes, X and Y used a common Amplifier). I turn of then on machine, and try to homing several time, also the same thing happen. I also try to do some others things as:
To clear alarm 90 and complete ref return process:
1: move Y far from home position, increase homing speed, the same alarm 90
2: change pare #1815 bit 5 from 1 to 0, power off then on, change back bit 5 to 1. power off, then ON and perform Y homing, alarm 90 again.
3: move Y axis far from home position, change para #1815 bit 5 from 1 to 0, bit 4 from 0 to 1. Power Off then On, change para 1320 limit 1+, set for Y axis value is 99999999. Perform homing, alarm 90 again
4: Exchange X and Y encoder, the same thing happen for Y axes. X axis homing OK
5: Check DEC LS signal is normal. And alarm 90 always appears immediately after DEC signal went OFF, and moving stop at distance ~2mm from home position (I see on the machine coordinate)
6: Adjust DEC LS hard position, can not complete homing with alarm 90
7: Disconnect motor from ball-screw, rotate motor only 1/2 turn, then reconnect motor. the same thing happened while homing
8: I try to manual set home position. Move Y axis to where it should be home position, change Para #1815 bit 5 from 1 to 0, bit 4 from 0 to 1, then change back bit 5 from 0 to 1, Power OFF and ON again with holding P+CAN when NC control start up.
No alarm coming, i can perform homing completely
But I got another trouble.
Every times, When I power OFF machine, then POWER ON, when NC control is ready, machine lost the home position and it auto reset machine coordinate for Y axis to 0 and take the position where it stop when power OFF as new home position without any alarm. I must manual ref return, this process is success. but i check the home actual position is wrong, it is minus ~0.8 mm from last home position which I set, and not stable.
This trouble make me headache :tired: and I hope somebody has ideas to troubleshooting.
Thanks!