Drives-AC Spindle Yaskawa CIMR-MTII | Repairs Precision Zone

Our Team Expertly Repairs Yaskawa AC Spindle Drive CIMR-MTII Series

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

Varispeed VS626 MTII Drives where Yaskawa’s second AC spindle series to come out and are reliable adjustable speed A/C spindle motor drives. The CIMR-MTII drives achieve high speed operation and heavy duty machining even while operating under adverse environmental conditions.

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-MTII 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 0.33 V for each phase

Multimeter Positive Lead	Negative Capacitor Terminal
Multimeter Negative Lead	U V W
Diode Check	Approximately 0.33 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 drive are displayed through a eleven white LED’s display located on the control board. Abbreviations are on the control board right next to the led. The codes displayed are :

Alarm Code	Code Type
ACFU	Fuse Blown
DCFU	DC Fuse Blown
OC	Overcurrent
OV	overvoltage
OS	Overspeed
UL	Under Voltage
OL	Overload
OH	Drive Overheat
FANM	Motor Cooling Fan Relay
FANC	Control Cooling Fan
DEV	Deviation Speed

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

Recently Repaired Products

CIMR-MTII-11K.H is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Fuse, Bad Gate Section/Board, Bad input thyristor, Leaky Capacitors (Open, Corroded Traces), Missing parts/components
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 11kW
Type: High speed

CIMR-MTII-11K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board, Missing parts/components, Bad Wires (Burnt), Bad Power Section/Board, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 11kW
Type: None

CIMR-MTII-18.5K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Control Section/Board, Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board, Bad Output Transistors/SCRs, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), Missing parts/components
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 18.5kW
Type: None

CIMR-MTII-15K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Fuse, Excessive Dirt/Debris
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 15kW
Type: None

CIMR-MTII-7.5K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 7.5kW
Type: None

CIMR-MTII-15K.A is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board, Bad Output Transistors/SCRs, Excessive Dirt/Debris
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 15kW
Type: Standard

CIMR-MTII-5.5K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad Fuse, Bad Gate Section/Board, Excessive Dirt/Debris
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 5.5kW
Type: None

CIMR-MTII-22K.A is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Brake Transistor (Regen), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), Missing parts/components, Multiple signs of previous repair
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 22kW
Type: Standard

CIMR-MTII-7.5K.A is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Gate Section/Board, Bad Output Transistors/SCRs, Bad Regen Section, Leaky Capacitors (Open, Corroded Traces), Physical Damage to the Drive
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 7.5kW
Type: Standard

CIMR-MTII-5.5K.A is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad DC Bus Capacitors, Bad Gate Section/Board, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 5.5kW
Type: Standard

CIMR-MTII-26K is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Control Section/Board, Bad Cooling Fans, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 26kW
Type: None

CIMR-MTII-15K.T is an
Drives-AC Spindle manufactured by Yaskawa
Discovered issues: Bad Output Transistors/SCRs
Drive Type: Spindle Inverter
Series: VS-626MTII
Max. Applicable Motor Output: 15kW
Type: Standard,for Toshiba