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Engineering & Simulation · Real-time motion control, deterministic to the microsecond
CNC control software where every deadline is a hard deadline.
CNC and motion controller software — G-code interpretation, look-ahead trajectory planning, and hard real-time servo control for machines that cannot miss a deadline.
Delivered from our Chennai and Bengaluru studios — to clients across India and overseas.
// The problem
A missed deadline in motion control is a defect in the finished part.
Machine control software operates under constraints ordinary software never faces. A control loop that misses its deadline does not degrade gracefully — it produces a position error and a surface defect. Unlimited jerk shows up as visible chatter. Shallow look-ahead turns a smooth contour into a stuttering series of decelerations.
Machine builders and integrators are frequently locked into proprietary controllers that cannot be extended, cannot support unusual kinematics, and carry licensing that erodes margin on every unit shipped.
Does any of this sound familiar?
Surface defects from motion irregularity
Chatter and marks traceable to trajectory planning rather than tooling.
Controller cannot support your kinematics
Proprietary systems that do not accommodate your machine geometry.
Licensing eroding margin per machine
Controller costs on every unit you ship.
No visibility into timing behaviour
A black box you cannot measure or tune.
What it costs to leave this alone
Motion quality is part quality. Defects traced to trajectory planning mean scrap, rework, and machines running below their capability — recurring cost on every part produced.
// How we fix it
Our approach to CNC Controller Software Development
We build control software with deterministic real-time loops on PREEMPT_RT Linux, Xenomai or dedicated microcontrollers, with jitter measured and reported rather than assumed. Jerk-limited S-curve planning with deep look-ahead and corner blending keeps motion smooth and surfaces clean.
That includes full-stack coverage: RS-274 interpretation with canned cycles and macro programming, forward and inverse kinematics for your machine geometry, EtherCAT/CANopen drive integration, operator HMI, and safety interlock logic architected to work alongside certified safety hardware.
Talk to us about your project// What changes
The return, in plain terms
What you should expect to be different once this is in place.
Measured
Real-time jitter
Worst-case timing characterised under sustained load and reported as a deliverable.
Smooth
Jerk-limited motion
S-curve profiles and look-ahead producing clean surfaces at speed.
Your
Kinematics supported
3 to 5 axis, gantry, delta and SCARA geometries with singularity handling.
// What's included
Everything in CNC Controller Software Development
Hard real-time motion loops
Deterministic control loops on PREEMPT_RT Linux, Xenomai, or dedicated microcontrollers with measured, bounded jitter — verified, not hoped for.
Look-ahead trajectory planning
Jerk-limited S-curve profiles with deep segment look-ahead, corner blending, and feedrate optimisation that keeps motion smooth and surfaces clean.
G-code interpretation
RS-274 interpretation with canned cycles, cutter compensation, work offsets, subprograms, and macro programming — plus your controller's dialect quirks.
Kinematics & transforms
Forward and inverse kinematics for 3-axis through 5-axis machines, gantries, delta and SCARA configurations, with singularity handling and soft-limit enforcement.
Fieldbus & drive integration
EtherCAT, CANopen, Modbus, and step/direction interfacing to servo and stepper drives, with homing, encoder feedback, and following-error monitoring.
HMI & safety interlocks
Operator interfaces with jogging, MDI, tool tables, and DRO — plus E-stop handling, limit switches, and interlock logic designed with functional safety in mind.
// Who this is for
Is this you?
Machine tool builders
Needing control software matched to their own machine geometry.
Integrators with custom kinematics
Where off-the-shelf controllers cannot be adapted.
Manufacturers modernising older machines
Retrofitting current control onto sound mechanical platforms.
// Problems we've solved
From challenge to result
Representative engagements, described in terms of what changed for the business.
The challenge
Finished parts showed surface marks traced to motion irregularity rather than tooling.
What we did
Implemented jerk-limited trajectory planning with deep look-ahead and corner blending on a verified real-time loop.
The result
Motion smoothed and the surface defects attributable to control behaviour were eliminated.
The challenge
A machine with unusual kinematics could not be driven by any available proprietary controller.
What we did
Built custom forward and inverse kinematics with soft-limit enforcement and singularity handling on a real-time control stack.
The result
The machine became controllable without redesigning its mechanical geometry.
// Technology
The stack we reach for
Chosen for durability and fit — and handed over as documented code you own outright.
C
C++
Rust
PREEMPT_RT Linux
LinuxCNC
EtherCAT
CANopen
Qt
STM32
// Questions
CNC Controller Software Development — FAQs
Often yes, and it saves significant time and risk. We build custom LinuxCNC components, kinematics modules, and HMIs, or extend GRBL and grblHAL for simpler machines. A from-scratch controller makes sense when you need specific real-time behaviour, proprietary kinematics, or full control over the stack for a product you ship.
Deterministic behaviour is measured, not assumed. We use a real-time kernel or dedicated MCU, isolate CPU cores, lock memory, and eliminate non-deterministic calls from the control path — then instrument the loop and report worst-case jitter under sustained load as a deliverable.
Yes — we work with EtherCAT, CANopen, and analogue/step-direction drives from Delta, Yaskawa, Panasonic, Siemens, and others. Where documentation is thin, we characterise the drive behaviour on the bench during integration.
We design E-stop chains, limit and homing logic, following-error and watchdog monitoring, and safe-state behaviour on fault. For machines requiring certified functional safety, we architect the control software to work alongside certified safety relays or safety PLCs rather than claiming safety certification in software we write.
// Read before you commit
Guides that answer the next question
Honest, detailed writing on costs, trade-offs and how to choose — including when not to hire us.
Custom Software vs Off-the-Shelf: A Business Decision Guide
When buying software saves money and when it quietly costs more than building it.
Read moreWhy Software Projects Fail (And How to De-Risk Yours)
The recurring causes of failed builds, and the practices that prevent them.
Read more// Explore more
Other things we engineer
Most clients start with one service and grow into others. One team owns the whole stack.