Spindle Selection

A guide to selecting your optimum spindle system in 7 steps.

Click here to download the PDF of this guide.

1. Populate Enquiry Sheet

Larger spindles use lager bearings so have greater load capacity. If run in “low RPM” range,
there is less heat generated therefore less cooling is required.

Key Criteria:

Clamping body diameter
Tool change: Manual/Auto
Cutter shank diameter

2. Select Spindle

Synchronous BLDC Motor spindle

One spindle per inverter High power density relative to size
Fewer losses; more efficient better able to run at S1

Find out more about Sycotec’s full range of Synchronous Brushless DC Motor spindles here.

Asynchronous AC Motor Spindle

4060

How many spindles per inverter?
Some inverters can run 2 or 3 AC spindles.
The technology is robust

Find out more about Sycotec’s full range of Asynchronous Motor spindles here.

3. Check total power and current required from inverter

Calculate total power and current requirement of required Spindle arrangement using the data sheet information for desired spindles.

Data sheets for each spindle can be found on their product pages here.

4. Select Inverter

Some customers may wish to use their own inverter
It may be possible to use a smaller inverter if the spindle is used at less than the max power;
see asterisked options in catalogue.

Some key considerations:

Is a choke required? – To filter the harmonics created by the sensor-less vector control?
Is a Brake resistor required? – Only required for some large DC spindles as inverters have small brake resistors already

For Further Information

Sycotec’s full range of Inverters can be found on our product pages here.
Chokes and Brake Resistors can be found in the Sycotec Catalogue here.

5. Select Power supply or transformer

Transformers are cheaper
Transformers work well with a regular electricity supply (electrical peaks adversely affect inverter performance).
It is safer to use a filtered power supply.
Desktop inverters and Easy Drive 4638 use 240V AC input so can be plugged into domestic mains in the UK.

Power supplies and transformers can be found in the Sycotec Catalogue here.