If you have a dead variable frequency drive board, a servo amplifier with a scorched gate driver section, or a spindle drive whose manufacturer stopped shipping spares six years ago, Motor Drive PCB Copy gets you a manufacturable copy of that board from the physical sample alone — Gerbers, drill data, BOM, and a schematic if you want one. No original design files needed. Send photos and the board, we tell you whether it’s feasible and what it costs.
That’s the short answer. The rest of this page is the detail a maintenance engineer or a plant manager actually needs before committing a sample to a courier.
Why motor drive boards end up on this bench
Drive boards fail in patterns. The power stage takes the abuse — IGBT modules, gate drive optocouplers, snubber networks, bus capacitors — and when a leg lets go it usually takes traces, a current sense shunt, and sometimes a chunk of laminate with it. Meanwhile the control section survives, the machine sits idle, and the OEM quotes a full drive replacement or says the part is end-of-life.
The four reasons drive boards come to us:
- Out-of-production equipment. A working machine tool, extruder, or elevator hoist controller with a drive board nobody stocks anymore. The mechanics are fine. The electronics are the bottleneck.
- Lost design data. A product owner still selling a drive product, but the original layout files went with a contractor, a failed CAD migration, or an engineer who left in 2011.
- Component obsolescence. The board is fine as a design, but a specific gate driver, current sensor, or DSP has gone obsolete and the board has to be re-spun around a current part.
- Failure analysis. A batch that keeps blowing the same phase, and nobody has the netlist to trace why.
All four are legitimate engineering work on hardware you own or are authorized to maintain. You’re responsible for holding the rights to the design; we work under NDA on every project and don’t take on requests to duplicate a competitor’s product.
What actually happens to your motor drive board
Here’s the order of operations, and what the engineer is looking at in each step. It’s worth reading because it explains why some boards take a week and some take three.
1. Intake and documentation
The board gets photographed at high resolution before anything is touched — both sides, plus close-ups of every marked component, connector pinout, and any hand-rework the OEM did at the factory. Drive boards very often carry factory rework: an added bleed resistor, a cut trace, a bodge wire near the bootstrap supply. That rework is part of the working design and it gets recorded, not silently cleaned up.
2. Mechanical and stack-up survey
Board outline, thickness, hole sizes, copper weight. Motor drives frequently mix copper weights — 2 oz or heavier on the DC bus and phase output, 1 oz on the control side — and getting that wrong is how a copy passes bench test and then fails at 40 °C in a cabinet. We measure and check the result against IPC-2152 current-carrying guidance, so the copy’s traces aren’t just visually identical but electrically sane at the current the board actually carries.
3. Component removal and identification
Parts come off under controlled heat, get logged by position, measured, and identified. This is where the hard part of a drive board lives: sanded-off markings on the main controller, house-numbered current sensors, custom-wound common mode chokes and gate transformers. Magnetics get characterized — turns ratio, inductance, core geometry — because you can’t buy them from a distributor by part number.
4. Layer imaging and copper extraction
Outer layers scan directly. Inner layers on a four- or six-layer drive board have to be imaged one at a time, which means controlled removal of copper and dielectric, scanning at each level, and then registering all the layers to each other by via and pad position. X-ray helps confirm via structure and internal plane cuts before any destructive work begins.
5. Reconstruction and verification
Copper images become a real CAD database — pads, tracks, planes, drills — not a traced picture. Then the netlist gets pulled out and checked back against the original board with a continuity test, node by node. On a drive board we pay particular attention to isolation: creepage and clearance across the high-voltage barrier, the gap under optocouplers, and the routing distance between bus-referenced and logic-referenced grounds. If the original honored a safety spacing, the copy honors it too.
6. Prototype, assembly, bring-up
First article boards get built, inspected against IPC-A-600 for the bare board and IPC-6012 class expectations for plating and hole quality, then assembled and powered. A drive board bring-up means checking gate drive waveforms, dead time, desaturation protection, current loop offset, and PWM behavior — not just “does it beep in the right places.”
Motor Drive PCB Copy vs. full reverse engineering — which do you need?
These are different jobs at different prices and people mix them up constantly. Copy gets you a manufacturable board. Reverse engineering gets you understanding.
| What you need | Scope | Deliverables | Typical use |
|---|---|---|---|
| Board duplication | Copper, drills, BOM, silkscreen | Gerber, drill, BOM, assembly drawing | Rebuild spares for a machine that’s down |
| Copy + editable CAD | Above, plus native design database | Altium/PADS project, netlist | You’ll modify the board later |
| Full schematic recovery | Above, plus circuit topology and function | Hierarchical schematic, sheet-level notes | Obsolescence redesign, failure analysis |
| Copy + firmware | Above, plus code readout from the controller | Board files plus verified binary | Drive won’t run without its original code |
Most maintenance cases only need the first row. Product owners planning a redesign need the third. If you’re unsure where your project sits, the comparison of a copy versus a full clone lays out the boundary, and the deeper treatment of motor drive reverse engineering with cost and lead time covers the schematic-level path.
The firmware question, because drive boards always have one
A power stage copy is straightforward. A control board copy is only useful if the controller runs. Motor drive boards typically center on a motor control DSP or MCU — TMS320 C2000 parts, STM32F1/F3/G4 with the advanced timer, dsPIC33, or an older 8-bit part on simple V/f drives — and that chip is usually read-protected.
Whether the firmware can be recovered depends on the specific part and how the protection was set. STM32 devices sitting at RDP Level 1 are a different proposition from Level 2, where debug access is permanently disabled. MSP430 parts with a blown JTAG fuse or a set BSL password behave differently again. Older 8051 and AVR derivatives with lock bits set are their own case. We evaluate the exact marking on your chip and tell you honestly whether we think readout is achievable before you pay for the attempt. We never guarantee a specific device is unlockable and we don’t quote success percentages.
If the drive has a bootloader and you still hold a valid firmware image or a service update file, say so early — that often removes the whole problem.
Where this gets hard, and where it sometimes doesn’t work
Honest constraints, so you don’t ship a board and get bad news three weeks later:
- Heavily burned boards. If a fault carbonized the laminate, vaporized traces, or delaminated an inner layer, that region has to be reconstructed by inference. A second, undamaged sample of the same board solves this instantly and is always worth hunting for.
- Potted and conformal-coated assemblies. Silicone coating is manageable. Fully potted gate drive modules or encapsulated power blocks may be unrecoverable without destroying what’s underneath.
- Custom magnetics. Current transformers and gate drive transformers can be characterized but rarely matched exactly off the shelf. Expect a wound-to-spec part and a validation loop.
- House-numbered and ASIC parts. A sanded IGBT driver or an OEM-specific control ASIC may have no drop-in replacement. Sometimes the honest answer is a functional redesign of that block, not a copy.
- Safety-certified drives. A copy reproduces the board, not the certification. If the drive carries a functional safety rating, that rating does not transfer and re-approval is on you.
- Buried and blind vias in HDI control sections. Feasible, slower, and it raises the price.
What to send us, and what comes back
Getting a real answer fast takes about five minutes of your time.
- Photos of both sides of the board on a dark, non-reflective background, whole board in frame, in focus, no flash glare. Add close-ups of the main controller and any burned area.
- Board dimensions in mm, plus board thickness if you can measure it.
- The chip marking on the main controller, typed out exactly as printed, including the suffix.
- One line on deliverables — Gerbers only, Gerbers plus BOM, editable CAD, schematic, firmware, or built and tested boards.
- Quantity and context — one spare for a downed line, or a production run.
Back from us: a feasibility assessment naming any specific risks we see in your photos, a layer count estimate, a lead time, and a price. Cost on a Motor Drive PCB Copy is driven by layer count, board area, component count, BGA presence, whether magnetics need characterizing, whether firmware is in scope, and how many deliverables you want. A two-layer V/f control board is days of work. A six-layer servo ampl
Working on a board like this?
Send the chip marking or two photos. You get feasibility, lead time and price within 24 hours, and the check costs nothing.
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