Engineering knowledge platform
Real hardware.
Documented properly.
Firmware, PCB design, CNC calibration and motion-control notes from projects
that actually shipped — embedded systems, machining and servo control,
written down the way I wish someone had written them down for me.
Three disciplines, one workbench
Embedded Systems
STM32, Arduino and ESP32 platforms. Firmware development, SPI/I2C/UART/CAN protocols, PCB design, sensor integration and low-power strategies for industrial hardware.
CNC & Machining
LinuxCNC conversions, G-code programming, toolpath strategies, machine calibration, post-processor development and tool-wear monitoring for hobbyist and production shops.
Motion Control
Servo and stepper motors, linear actuators, PID tuning, VFD spindle configuration, multi-axis controllers and robotic positioning for automation workflows.
Who’s behind this
Built by the person who wires it up
Virender Kumar runs JustLast alongside his engineering businesses. With 15+ years
in electronics, mechatronics and motion control, he builds real systems — servo
motor configurations, CNC machines, conveyor systems, embedded controllers —
and documents the process here.
JustLast is the knowledge arm. The commercial engineering work happens through
Neway and Velton Pvt. Ltd., which build motion
control systems, linear actuators, conveyor systems and operating-theatre equipment.
Currently documenting
- Integration
- Industrial IoT, PLC vs IPC
- Protocols
- Modbus, EtherNet/IP, OPC UA, Profinet
- Machining
- CNC calibration pipelines
- Motion
- Servo tuning, stepper driver comparisons
- Firmware
- Post-processor & embedded workflows
Looking for the hardware, not the write-up?
Servo motors, linear actuators, conveyor systems and OT equipment ship through Neway & Velton.