Our Team Expertly Repairs Yaskawa AC Servo Drive CIMR-MTIIB series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC Spindle series such as Yaskawa CIMR-MTIIB Series Spindle Drives.

Varispeed VS626 MTIIB Drives are reliable adjustable speed A/C spindle motor drives. CIMR-MTIIB drives combine a compact A/C spindle drive motor with a digital vector controlled, transistor inverter. There is one seven-segment led that can display alarm information.

The CIMR-MTIIB drives achieve high speed operation and heavy duty machining even while operating under adverse environmental conditions. The CIMR-MTIIB is an ideal spindle drive for machining centers, lathes, and milling machines.

When assessing the functionality of a drive, our engineering team typically conducts a four-step check:

  • Visual Overview Check
  • Static Test
  • Checks Under Power
  • Alarm Codes Verification

This overview is Precision Zone’s basic troubleshooting process. Once our repair team starts on the job we use specialized, customized test fixtures, Huntron tracker, signal generator, oscilloscope, milli and mega ohm meters and other necessary tools to assure quality repair. Most importantly, every repair is fully tested in custom-built simulators under load to replicate real-life working environment. Precision Zone goes as far as using heat chamber and overnight dynamic testing to guarantee performance of the repaired product when it comes back to the customer.

REPAIR PROCESS FOR CIMR-MTIIB SERIES SPINDLE DRIVE

Visual Overview Check

When conducting a visual check, the technician inspects the drive for any mechanical damage to the drive and print circuit boards. Then the team proceeds to verify connections are tight and correct inside the drive and there are no loose screws, wires or particles. Additionally, we look for any burn marks anywhere on the components or chassis. During the visual inspection technical team notes excessive dirt on cooling components and records clogged heatsink.

Static Test Basic

Precision Zone repair technicians use digital multimeter with diode testing capabilities and resistance measurement to conduct a static test. In the instance of Diode testing, our team is looking to check input and output modules.

First you must open up the drive and using your digital multimeter check the DC buss and make sure the DC buss has been discharged.

You are not able to check the inputs on this drive.

Output Modules Testing

Multimeter Positive Lead U V W
Multimeter Negative Lead Positive Side of the DC Buss
Diode Check Approximately 0.27 V for each phase
Multimeter Positive Lead Negative Side of the DC Buss
Multimeter Negative Lead U V W
Diode Check Approximately 0.28 V for each phase

We verify capacitor value using capacitor meter and examine functionality of circuit breakers and contactors in the drive.

Alarm Codes Troubleshooting

The alarms on the spindle dirve are displayed through one seven segment display located on the control board. The codes displayed are:

Alarm Code Code Type
FU Fuse Blown
OC Overcurrent
OV overvoltage
OS Overspeed
UV Under Voltage
OL Overload
OH overheat, Fan C, motor OH or Controller OH

The majority of these alarms can be triggered if there is a fault in the control circuit.





Recently Repaired Products

Yaskawa CIMR-MTII-15K.B image CIMR-MTII-15K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad DC Bus Capacitors, Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 15kW
Type: B

Yaskawa CIMR-MTII-9K.B image CIMR-MTII-9K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad DC Bus Capacitors
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 9kW
Type: B

Yaskawa CIMR-MTII-11K.B image CIMR-MTII-11K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Circuit Board Component(s), Bad DC Bus Capacitors, Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Blown Circuit Board (Through Hole), Leaky Capacitors (Open, Corroded Traces), May Require Board Replacement
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 11kW
Type: B

Yaskawa CIMR-MTII-26K.B image CIMR-MTII-26K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Cooling Fans, Bad Power Board, Bad Power Section/Board, Leaky Capacitors (Open, Corroded Traces), May Require Board Replacement, No Display
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 26kW
Type: B

Yaskawa CIMR-MTII-7.5K.B image CIMR-MTII-7.5K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Board Replacement Required, Bad Circuit Board Component(s), Bad Gate Section/Board, Blown Circuit Board (Through Hole), Leaky Capacitors (Open, Corroded Traces), Physical Damage to the Circuit Board/s, Physical Damage to the Drive
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 7.5kW
Type: B

Yaskawa CIMR-MTII-18.5K.B image CIMR-MTII-18.5K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Power Board
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 18.5kW
Type: B

Yaskawa CIMR-MTII-5.5K.B image CIMR-MTII-5.5K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Control Section/Board
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 5.5kW
Type: B

Yaskawa CIMR-MTII-30K.B image CIMR-MTII-30K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Output Transistors/SCRs, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 30kW
Type: B

Yaskawa CIMR-MTII-22K.B image CIMR-MTII-22K.B is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Cooling Fans, Bad Output Transistors/SCRs, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTIIB
Max. Applicable Motor Output: 22kW
Type: B