Setting up a Sieb & Meyer Converter - Westwind Air Bearings

A Guide to setting up a 

Sieb & Meyer 21-60 or 21-62 

converter 

For using as a spindle running 

rig 

Westwind Air Bearings, a division of GSI Group Ltd. 

Holton Road, Holton Heath, Poole, Dorset. BH16 6LN. UK 

Tel: +44 (0) 1202 627200 Fax: +44 (0) 1202 627208 

Email: wwinfo@gsig.com Web: www.westwind-airbearings.com

Setting the Sieb & Meyer converter 

a, Initial powering up 

Initially switch the test set followed by the converter; only green lights 

should be displayed on the drive, if a red fault light appears this possibly 

is caused by; 

1, the test set is not switched on 

2, the PTC thermistor is not linked out 

3, the spindle electrical wiring has a short or link to ground 

Switch off the drive unit and test set; carry out an examination to rectify 

the fault 

Once the fault has been diagnosed and rectified then repeat the sequence 

of switching off all item and repeat the powering up operation as above, 

if the fault has been corrected then the fault light will not appear 



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, Pre-programmed characteristic curve 

Once after the powering up operation has successfully been completed 

the handset should display the following; 

1 Operation 

2 Programming 

Select the operation function (1), the hand set will now display the 

characteristic curve option, type in the curve number which has been 

previously been defined, this will now bring up on the hand set the 

following options; 

1 Frequency indication 

2 Speed indication 

3 Power indication 

4 Load indication 

Select frequency indication (1) and now you can type in the frequency 

you wish to run at (note this is the input frequency and not the actual 

rotational speed of the spindle) 

Select the enter key (↵) and then press the start key, the spindle will now 

run up to the input frequency defined following the characteristics as predefined 

including the ramp up/down time, bending points limit settings. 



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C, programming the characteristic curve 

Once after the powering up operation has successfully been completed 

the handset should display the following; 

1 Operation 

2 Programming 

Select the programming function (2) (↵), the hand set will now display 

the 4 digit password code option, type in the code number which has been 

previously been defined (default code set by manufacture = 0000), this 

will now bring up on the hand set the following options; 

1 Characteristic curve 

2 Bending point 

3 Limit settings 

4 Number of poles 

Select Characteristic curve option (1) (↵) and now you can type a curve 

number which you wish to use that has previously not been used (note if 

you type in a previously defined curve number you will over-write the 

stored information) make a note of the curve numbers used and for what 

purpose it had been generated e.g. curve 01 = spindle type DXXXX-XX 

standard set-up press return 



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Now select option 2 (↵) the bending point option, this will allow you to 

input the knee points (also known as the dog legs),these values must be 

entered into the drive from the lowest speed knee point to the highest 

(max speed) this information is the frequency against the TRUE output 

voltage (not the displayed voltage on the hand set) see note 1 to see how 

to find the true output voltage, if there is no knee point required e.g. then 

only add the final frequency and voltage (a linear straight line). 

Once after the final operating speed has been added input an additional 

point should be added at the same final Voltage but at a slightly higher 

frequency which produces a true maximum rotational speed in the spindle 

shaft, as defined on the spindle Outline drawing. But the frequency is 

higher, this value is higher by the operating slip value (to ensure that the 

shaft is the required operating speed). 

A list of standard bending curves for spindles is listed within the 

appendix 

Press enter (↵) and to store the change press run and the option of save 

data +/- will be displayed select + to store 

Note 1. 

The true output voltage can be measures by using a Fluke III multimeter, 

connect the meter between two of the phase wires and set the multimeter 

to volts without any other equipment connected, start the drive and select 

operate, select the required spindle curve that has been pre-programmed 

and select frequency, type in the first knee point frequency and the start, 

confirm that the voltage reading is that quoted on the outline drawing, if 

not then adjust the voltage within the programming operation to give the 

required voltage. 



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If you require to change the limits settings e.g. the ramp time/current 

limit/voltage limit then select 3 (limits setting in the main menu) this will 

display a menu for the limit settings as follows; 

1, Current limit 

2, Acceleration / deceleration limits 

3 Minimum frequency 

4 Voltage limit 

The options are very much self-explanatory and are customer dependant, 

for development trials the acceleration ramp up should be set initially for 

30 seconds and the deceleration should be set for 20 seconds, this is to 

record the changes is temperatures during testing and ensures safety 

during the development of new designs, once the design has been proven 

then this should be set to a worse case scenario to ensure the spindle 

performs throughout its speed range within the spindle design 

specification. 

Press enter (↵) and to store the change press run and the option of save 

data +/- will be displayed select + to store. 



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Character Curve 

Standard Westwind settings 

Character curve CC XX (Programmed – customer defined ) 

Bending Points BP XX (Defined on the outline drawing) 

Current limit I Max = 5A 

Acc / Decel t-acc = 120 sec 

t-dec = 30 sec 

Min frequ f min = 000Hz 

No of Poles Poles = 2 

Compensations Slip = 0% 

IxR = 0% 

Loading Sensitivity S = 04 

Holding Current I = 0 

T = 0 

Reference Value Source = Set to remote control 



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Standard Westwind Bending Curves – 

Ref only CHECK TO OUTLINE DWG 

(the output voltages require checking on a meter against the outline 

dwg) 

D1201-01 Voltage (V) = 130 152 152 

Frequency (Hz) = 600 1897 1897 

D1633-02 Voltage (V) = 60 145 150 150 

Frequency (Hz) = 250 800 2000 2000 

D1473-01/03/05 Voltage (V) = 92 203 203 

Frequency (Hz) = 500 3150 3150 

D1600-01 Voltage (V) = 60 145 160 160 

Frequency (Hz) = 250 800 2195 2195 

D1199-03 Voltage (V) = 130 160 166 166 

Frequency (Hz) = 600 1833 2195 2195 

D1331-17/28/41 Voltage (V) = 130 166 166 166 

42/47/13/55/68/54 Frequency (Hz) = 600 2083 2150 2150 

D1531-08/09/11 Voltage (V) = 55 170 170 

Frequency (Hz) = 500 2565 2565 

D1686-03 Voltage (V) = 85 242 242 

Frequency (Hz) = 500 3150 3150 

D1331-26/36/48 Voltage (V) = 140 220 220 

Frequency (Hz) = 600 2195 2195 

D1633-02 Voltage (V) = 60 145 150 150 

Frequency (Hz) = 250 800 2000 2000 

D1296-11 Voltage (V) = 145 194 194 

Frequency (Hz) = 583 1667 1667 



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D1331-24 Voltage (V) = 140 212 212 

Frequency (Hz) = 600 2195 2195 

D1524-05 Voltage (V) = 120 165 165 

Frequency (Hz) = 600 2195 2195 

D1251-03 Voltage (V) = 145 180 180 

Frequency (Hz) = 583 1333 1333 

D1473-01/07/09 Voltage (V) = 92 230 230 

Frequency (Hz) = 500 2833 2833 

D1686-10/11/12 Voltage (V) = 90 131 200 200 

Frequency (Hz) = 500 1000 3110 3110 

D1566-04 Voltage (V) = 80 229 229 

Frequency (Hz) = 500 2790 2790 

M320-24 Voltage (V) = 45 130 130 

Frequency (Hz) = 250 1360 1360 

D1722-03 Voltage (V) = 90 131 189 189 

Frequency (Hz) = 500 1000 2760 2760 

D1722-04 Voltage (V) = 90 131 215 215 

Frequency (Hz) = 500 1000 2800 2800 

D1769-01 Voltage (V) = 80 131 189 189 

Frequency (Hz) = 500 1000 2760 



Tel: +44 (0) 1202 627200 Fax: +44 (0) 1202 627208

Setting up a Sieb & Meyer Converter - Westwind Air Bearings

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