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This pre-programmed ESP32 DevKitC module is the plug-in controller used in the 4 Axis Do-it-Yourself DRO Kit (TDK-40), a wireless digital readout (DRO) solution for milling machines and metal lathes. It comes with the same TouchDRO Plus firmware we ship with current TDK-40 kits, so it drops straight into a kit motherboard or a compatible DIY carrier board and works just like the original module. When paired with the TDK-40 main board for DIY DRO builds, it forms a complete 4-axis TouchDRO adapter for glass and magnetic scales.
Firmware and features
All modules are shipped with TouchDRO V3 Plus firmware pre-installed, providing:
- Support for up to 4 quadrature encoder inputs (optical and magnetic DRO scales, via a suitable carrier/mainboard such as the TDK-40 DIY DRO main board)
- Access to the TouchDRO Plus Android application for advanced digital readout functions
- Support for Mitutoyo SPC and BIN6 digital data protocols (requires appropriate input conversion circuit)
- Ideal for DIY DRO upgrades on mills, lathes, and other machine tools using glass or magnetic linear scales
For general capabilities, see the 4 Axis Do-it-Yourself DRO Kit description and the TouchDRO Adapter Feature Comparison page.
Supported DRO Scales
The adapters support DRO scales and rotary encoders that output 5V quadrature signal. This includes:
- Majority of modern optical, magnetic, and inductive digital readout scales. Learn more
- Mitutoyo DigiMatic scales with SPC output – with SIC-5V-MIT-A input converter (sold separately) or appropriate custom input circuit
- iGaging Absolute DRO Plus scales – with SIC-3V3-IG-A input converter (sold separately) or an appropriate custom input circuit