I have a 3 axis vertical mill using an M400S control; s/n 60060. In the process of running a cycle, it was moving down into position and at the approximate point of transition from rapid to feed, it stopped. I now get error code 411 on my screen. I have verified that it did not crash into a stop of any kind and nothing I can find indicates the head is tied up at all. I have checked my limit switches and they seem to be working properly too. With power on or off, I can turn the leadscrew by hand freely in either direction. I have checked fuses and tried everything I can think of.
Is there a way to check the servo motor? or what else can I check before calling someone? I have the motor information from the tag, that's all there. Note: the machine was working as expected just prior to this failing. Ideas?
Z axis failure
Moderator: cnckeith
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- Posts: 1
- Joined: Wed Aug 18, 2021 10:32 am
- Acorn CNC Controller: No
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: 60060
- DC3IOB: No
- CNC12: No
- CNC11: No
- CPU10 or CPU7: Yes
Re: Z axis failure
K60060 would probably be an M400 (with a SERVO1 drive), and not an M400S (with a SERVO3IO or DC3IO drive).
Do you get "411 ... full power without motion" for any axis you try to jog, or just the Z axis?
Assuming you have a SERVO1 drive (see http://www.cncsnw.com/Drives.htm#SERVO1), when you release Emergency Stop, what is the DC voltage across terminals 10 and 9 at the bottom of the drive? Are the green UV and USV LEDs on the left side of the drive lit?
Do you get "411 ... full power without motion" for any axis you try to jog, or just the Z axis?
Assuming you have a SERVO1 drive (see http://www.cncsnw.com/Drives.htm#SERVO1), when you release Emergency Stop, what is the DC voltage across terminals 10 and 9 at the bottom of the drive? Are the green UV and USV LEDs on the left side of the drive lit?
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- Posts: 13
- Joined: Wed Nov 24, 2021 7:08 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: 2188
- DC3IOB: No
- CNC12: No
- CNC11: No
- CPU10 or CPU7: Yes
Re: Z axis failure
I have a 2 axis Hardinge CHNC using an T39 control; s/n 2188. I'm about to sell it. I started it weekly and always worked perfectly In the process of startup today and pushing home position, Z axis moved to home then X started to move into position, it stopped. It didn' hit the limit switch yet. I get error code 411 on my screen. It didn't hit the limit switch yet. I have verified that it did not crash into a stop of any kind and nothing I can find. I have checked my limit switches and they seem to be working properly too. With power on or off, I couldn't turn the leadscrew by hand freely in either direction. It felt notchy. On the operator side I took off the small CHNC silver cover and used a 3/16 Allen and felt notchy resistance back and forth. Then I could rotate it in either direction but still did not feel smooth. I put my left hand on the body as I was rotating and could feel grinding in the motor body. I have checked fuses and tried everything I can think of.
Is there a way to check the servo motor? I'm assuming the motor went inside. I have the motor information from the tag, that's all there. Note: the machine was working as expected just prior to this failing. Ideas?
Is there a way to check the servo motor? I'm assuming the motor went inside. I have the motor information from the tag, that's all there. Note: the machine was working as expected just prior to this failing. Ideas?
-
- Posts: 13
- Joined: Wed Nov 24, 2021 7:08 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: 2188
- DC3IOB: No
- CNC12: No
- CNC11: No
- CPU10 or CPU7: Yes
Re: Z axis failure
Part#3879 SN#2044-77
Torque 17 in/lb 2 5 AMPS
WRPM 2350 @ 120VDC
Ferrite Brushed DC Servomotor
Torque 17 in/lb 2 5 AMPS
WRPM 2350 @ 120VDC
Ferrite Brushed DC Servomotor
Re: Z axis failure
Take the belt off, then see whether the notchy resistance and grinding are in the motor, or in the ballscrew.