View Full Version : Need Help! Alarm problem OKUMA MB- 46VA - R

02-18-2009, 04:50 AM
Hello everyone...
my name is John
I got Okuma vertical milling machine (MB-46VA)
the alarm code is 1326 ABNORMAL TEMPERATURE RISE
How can i solve this problem...
please help....:drowning:

02-19-2009, 04:34 PM
Sounds like a problem with you spindle cooling unit, try cleaning the filters and the area around the unit, fluid levels etc, to see if that corrects the problem.
Is the unit actually coming on , green light etc. ?
Does ajusting the temp knob or pushing the reset button on the unit make it work ?

Next step - an Okuma rep. to check it out

02-20-2009, 01:07 AM
OK I'll try first, I'll let you know if that working or not, thanks bro..

old timer okuma
02-20-2009, 06:47 PM
this alarm is related to the thermisters in the spindle or casting. if you turn on all the display pages you should have a thermal comp display page that will show you the temps of all the sensors. the one out of range is the bad one.

02-23-2009, 02:48 PM
OTO is correct!

The thermal sensors for the machine temperature have been changed since oct. 2003. According to the change, the four types of sensors have been united to only one type. Since the same type of the thermal sensors is applied to all machines, and the shape is a package type, there is no special items to be taken cared of when they are exhchanged.

The new type is fully sealed unit where as the old ones were siliconed sealed.

Part # you need is #E4433-326-009

If OSP-E100 control you MUST ORDER NOISE FILTER!!!!

PN# E0155-521-015

02-23-2009, 09:30 PM
so what should I do, can you tell me more

02-23-2009, 10:01 PM
Get me the temps you seeing on your sensors. We need to determine which channel (sensor) is bad. Okuma is VERY secretive about thermal compensation as it is one of many things that differentiates them from the competition.

Ultimately you need to change this sensor. OR TURN IT OFF which is possible as well. If you start seeing issues in holding size which may occur depending on what tolerance you are trying to hold, then you must replace the sensor.

This is most commonly seen on horizontals, MA-500, 600, 800 etc.

02-23-2009, 10:23 PM
Where can I turn it off the sensor, coz it take time to replace with the new one

02-23-2009, 10:29 PM
What series OSP control ?

02-23-2009, 11:03 PM

02-23-2009, 11:45 PM
you need to determine which channel is defective.

To turn off...
Go into parameters.
Turn the thermal deviation comp. switch from YES to NO.

Once switched to NO the following screens appear.

A. Common Parameter A
B. Common Parameter B
C. Parameter X,Y,Z
D. Conversion Table

Select A. Then there you will be able to turn off the channel that is defective.

02-24-2009, 01:41 AM
thanks bro. its working... so what the next step should I do. When I turn the thermal deviation comp off,I can reset the alarm. when I try to turn the thermal ON the alarm come out again.

02-24-2009, 01:44 AM
Do you think I can still use this machine and wait for the replacement

02-24-2009, 08:24 AM
You can run without them. BUT if you see deviation starting to occur with size of your parts then I would recommend changing them.

Yes of course when you turn defective channel of it will get rid of the alarm.

02-24-2009, 07:37 PM
you're my hero...lol:wee:

04-26-2009, 12:15 PM
it's also good to check if spindle is not overloaded