Page 1 of 2 12 LastLast
Results 1 to 12 of 14

Thread: Alarm 221 (Turret Sensor Malfunction)

  1. #1
    Registered
    Join Date
    Jan 2012
    Location
    usa
    Posts
    3
    Downloads
    0
    Uploads
    0

    Default Alarm 221 (Turret Sensor Malfunction)

    Hey guys, I have a Mazak QT250HP, and I am getting alarm 221 Turret Clamp Sensor Malfunction). The turret will rotate,and stop on the correct tool, but is not completely locking in. The screen shows the correct tool ID, but when I try to rotate the turret by hand to see if it is locked in, it feels spongy. When I power it down for a reboot, the turret releases, and free-wheels...bringing the heaviest tool on the turret down toward the bottom side! I took the valve off the back, and checked the solenoids and cleaned the valve plunger. It all looks good. When I rotate the turret, in either direction, I hear the valve in the back click, but its not as loud and strong sounding as it used to be. Does anyone have any advice? Thanks....

    Similar Threads:


  2. #2
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    It does the same thing to the machine I use at work same slant 60n Everytime I try run tool 1 it pop up alarm 221 turret sensor malfunction. So how do you fit this problem? Or should I let my boss know so he can call maintain guy to fix it?



  3. #3
    Registered Night Shift Wiz's Avatar
    Join Date
    May 2012
    Location
    USA
    Posts
    94
    Downloads
    0
    Uploads
    0

    Default

    I'm assuming you have a hydraulic driven turret and not a servo driven. So correct me if I'm wrong.

    Can you clamp and unclamp the turret manually, at least partially? If so, you probably just knocked the turret out of alignment and it is not meshing with the curvix coupling. There should be a taper lock bushing either on the turret itself or the drive gear that you can loosen and manually position the turret so that it meshes perfectly with the curvix coupling when you clamp.

    You could also have a prox switch problem. Maybe one is stuck on?



  4. #4
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Night Shift Wiz View Post
    I'm assuming you have a hydraulic driven turret and not a servo driven. So correct me if I'm wrong.

    Can you clamp and unclamp the turret manually, at least partially? If so, you probably just knocked the turret out of alignment and it is not meshing with the curvix coupling. There should be a taper lock bushing either on the turret itself or the drive gear that you can loosen and manually position the turret so that it meshes perfectly with the curvix coupling when you clamp.

    You could also have a prox switch problem. Maybe one is stuck on?
    I did the on the screen monitor has unclamp turret manually did that turret seem to pop open and close but still not run. Tool #1 once in a while it does this and it so hard to get it run normally. Do you know actually where the taper lock bushing? cause i look every I don't see it.

    Sorry but what do you meant by "manually position the turret so that it meshes perfectly with the curvix coupling when you clamp."??



  5. #5
    Registered Night Shift Wiz's Avatar
    Join Date
    May 2012
    Location
    USA
    Posts
    94
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Nleo22 View Post
    I did the on the screen monitor has unclamp turret manually did that turret seem to pop open and close but still not run. Tool #1 once in a while it does this and it so hard to get it run normally. Do you know actually where the taper lock bushing? cause i look every I don't see it.

    Sorry but what do you meant by "manually position the turret so that it meshes perfectly with the curvix coupling when you clamp."??
    It's possible that the turret is out of alignment so that when you clamp it, it sets down on top of the curvix coupling teeth instead of in between them. Therefore it doesn't clamp fully and turn on the prox switch. IF that is the case there is a taper lock bushing that once you loosen all the screws will let you spin the turret to any position you want independent of the drive sytem. If your turret sets on a splined shaft, the turret spline is the bushing that you can loosen. If it doesn't, then the bushing it probably in the big drive gear back by the valves.

    Before you waste time looking for the bushing you must make sure that misalignment is the problem. You should be able to mark or measure the edge of the turret when it is fully clamped and fully unclamped. Then, anything in between means it's not seating fully and probably misaligned. If it IS seating fully and you still get the alarm then you should look at the prox switch or possibly the turret encoder is out of sync. You sync the encoder by being at tool #1 (fully clamped) and turn the encoder until the little LED lights up.



  6. #6
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    Hi, I really stupid fixing thing like this. Sorry but where the brushing tape location? And unscrew where? Behide machine in front? There lot of screws in machine Have any pic to guide me thought this?



  7. #7
    Registered Night Shift Wiz's Avatar
    Join Date
    May 2012
    Location
    USA
    Posts
    94
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Nleo22 View Post
    Hi, I really stupid fixing thing like this. Sorry but where the brushing tape location? And unscrew where? Behide machine in front? There lot of screws in machine Have any pic to guide me thought this?
    Start from scratch. What controller do you have? Fusion? Nexus? T32? T2?



  8. #8
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Night Shift Wiz View Post
    Start from scratch. What controller do you have? Fusion? Nexus? T32? T2?
    It's mazak slant turn 60n " mazatrol T plus" control I think



  9. #9
    Registered Night Shift Wiz's Avatar
    Join Date
    May 2012
    Location
    USA
    Posts
    94
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Nleo22 View Post
    It's mazak slant turn 60n " mazatrol T plus" control I think
    This one is probably hydraulic driven. What happened to the QT250?

    Anyway, need to verify if problem is not clamping fully or something else. Only happens on tool #1? Does turret have backlash when unclamped? Can you rock it back and forth unclamped? If so, a heavy tool could put turret off balance at position #1.

    First, figure out if it's clamping fully when it alarms. Or if it's fully unclamped or partially clamped.



  10. #10
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Night Shift Wiz View Post
    This one is probably hydraulic driven. What happened to the QT250?

    Anyway, need to verify if problem is not clamping fully or something else. Only happens on tool #1? Does turret have backlash when unclamped? Can you rock it back and forth unclamped? If so, a heavy tool could put turret off balance at position #1.

    First, figure out if it's clamping fully when it alarms. Or if it's fully unclamped or partially clamped.
    When I unclamp turret it push to left I don't see it push back. When clamp it push to right which is back to normal position but tool number doesn't show on the screen and later it alarm show up. It happen to tool 1 and 10 sometime 2. When switch to tool 1 I can't unclamp untill alarm show up than that when I can unclamp it and close it as many time I want



  11. #11
    Registered Night Shift Wiz's Avatar
    Join Date
    May 2012
    Location
    USA
    Posts
    94
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Nleo22 View Post
    When I unclamp turret it push to left I don't see it push back. When clamp it push to right which is back to normal position but tool number doesn't show on the screen and later it alarm show up. It happen to tool 1 and 10 sometime 2. When switch to tool 1 I can't unclamp untill alarm show up than that when I can unclamp it and close it as many time I want
    If you pull the cover off the right side of the turret housing you should see a small encoder with a single LED on cover. The light should be "on" in position #1. If not, loosen screws and rotate slightly back and forth until light is on. Then retighten screws.

    While inside the back, check the two prox switches for clamp and unclamp confirmation. One may be slightly out of adjustment.



  12. #12
    Registered
    Join Date
    Jun 2012
    Location
    Usa
    Posts
    6
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Night Shift Wiz View Post
    If you pull the cover off the right side of the turret housing you should see a small encoder with a single LED on cover. The light should be "on" in position #1. If not, loosen screws and rotate slightly back and forth until light is on. Then retighten screws.

    While inside the back, check the two prox switches for clamp and unclamp confirmation. One may be slightly out of adjustment.
    All the way from the right? The big circle cover? Or the small circle cover under the turret?



Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum from DIY CNC Machines to the Cad/Cam software to run them. The site is 100% free to join and use, so join today!

Follow us on

Facebook Dribbble RSS Feed