INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Mazak MK II 2.5 kW

Mazak MK II 2.5 kW

(OP)
Hi everyone,

we have problem on above mentioned machine. It shows turbo blower 300 T/B alarm on main display. We checked oil, changed gas completely, leaking gas, ... etc., but without success. In past, we avoid this problem with few turn off/on-s, after which machine started successfully, but now that's not working either.
There is also error 21 on oscillator and when high voltage is applied the current goes to 98A then drops to zero (think the normal is 40-50).

Does anyone have any other tip, or blower is dead and we need to call mazak?

RE: Mazak MK II 2.5 kW

Hi,

Did you resolve it? sounds like the booster rotor or motor bearings are failing.
what are the amps before the HV is switched on?
Do the amps immediately jump straight up when the HV is switch on or is it gradual?

RE: Mazak MK II 2.5 kW

(OP)
Nope, but we managed to start machine up and now it's on non-stop for 7 days and cutting fine.
The problem still exists after machine is completely off.

About amps, thy are gradually rising to 96-98A and instantly drops to 0 after.

RE: Mazak MK II 2.5 kW

Weird, might be the yaskawa drive, unlikely the booster will load right up & then come good for a week.
you might want to tong the 3 phases coming out of the drive that feed the booster motor.

how many hours on the booster?
compare the actual load (tong meter) to the VFD load on the display

if the tong also show the amps climbing then the booster needs looking into more (maybe it's heating right up, cooling problem maybe?)

If the tong shows stead amps when the VSD is climbing then the VFD is probably shagged.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close