Application
Machine tools and CNC
Interpolation, tool compensation and G-code on an EtherCAT master that holds 32 axes at a 500 µs cycle.
The machine
Cutting, grinding, engraving and contouring
A machine tool is judged on the path it leaves behind. Backlash, pitch error and tool radius all show up on the part, and none of them can be corrected after the cut. The control has to interpolate smoothly, compensate deterministically and home repeatably.
The retrofit case is common: a working machine with a dead controller. The mechanics are sound, the drives may even be reusable, and the question is whether the new control can drive the existing motors and read the existing scale.
The control
What has to happen, and fast enough
PRO and MAX provide the EtherCAT master: 32 axes, a 500 µs minimum system cycle and IEC 61131-3 MC instructions in ladder. MAX adds the Motion layer — line, arc, helix, spline and NURBS interpolation, G64 continuous small-line-segment mode, pitch error, backlash and tool-radius compensation, Z-pulse homing, and CAD, text or image import to generate G-code.
On the drive side, R8 Z-variants run CSP, CSV and CST at 1 ms, 500 µs and 125 µs, with a 23-bit absolute encoder that keeps position across a power cycle — so a machine can home without a limit switch.
Recommended hardware
A typical bill of materials for this machine
These are the models the export desk quotes most often for this application — not the only valid combination.
| Function | Recommended | Why |
|---|---|---|
| Operator panel | SK-102QS or SK-H150AS | 10.2 or 15-inch; 15-inch for a full tool-path view |
| Controller | MAX-C | G-code, NURBS, compensation, 32 EtherCAT axes |
| Feed axes | R8-2210Z-N + HK-80/110 flange | 1 kW class, EtherCAT, 23-bit absolute |
| Handwheel | High-speed counter input | MPG via the 16-channel high-speed counting block |
I/O counts and axis counts assume a mid-range machine. Send the actual list and the quotation will be sized against it.
Engineering notes
What usually goes wrong
- Specify 23-bit encoders for feed axes: the extra resolution is what makes compensation corrections land where intended.
- Z-pulse homing is the fallback; absolute encoders remove the homing cycle and the switch from the drawing.
- Put the panel on the door away from the spindle: swarf and coolant reach a front panel that faces the cutting zone.
- For a retrofit, measure the existing motor's encoder and command interface before choosing R8 P or Z.
Send the machine, not the model
Describe the axes, the I/O and the market it ships to. We answer with a model code, a cut-out check and a landed-cost quote — usually within one business day.
Next step
Tell us what the machine has to do.
Send the axis count, the I/O list or a photo of the existing panel. You get a model recommendation, a wiring note and a quote — usually within one business day.