Danfoss VFD Software & Programming: What Happened to Pete Jackson Gear Drives and Why It Matters for Your Motion Control Choices
Look, I'm an office administrator, not an engineer. I manage ordering for a mid-size manufacturing facility—about 60-80 orders a year across 8 vendors. Most of that is motion control stuff: VFDs, motors, actuators. My job is to keep the engineers happy and the finance folks off my back.
Recently, a senior tech asked me about Danfoss VFD software and programming manuals. Then, out of nowhere, he brought up a name I hadn't heard in years: "What happened to Pete Jackson gear drives?" Turns out, the company went under a while back. That got me thinking about the trade-offs between old-school mechanical drives and modern electronic VFDs. So, here's my take as a buyer, not a specialist.
The Comparison: Legacy Gear Drives vs. Modern Danfoss VFD Systems
When you're choosing motion control, you're often choosing between two worlds: the reliability of a mechanical gear drive (like what Pete Jackson used to make) and the flexibility of a modern Danfoss VFD with programmable control.
The Core Difference: Gear drives are physically robust but inflexible. Danfoss VFDs are software-defined, allowing for precise control and modification without changing hardware.
Let's break this down across three dimensions that matter to us on the purchasing side: reliability, programmability, and long-term support.
Reliability: The Gear Drive Advantage (and its Hidden Cost)
Pete Jackson gear drives had a legendary reputation for being tough. You could throw a 5 HP motor on one, and it'd run for 20 years in a dusty factory without complaint. That's real reliability.
But here's the thing (and I learned this the hard way in a 2022 procurement review): mechanical gear drives fail. They wear out. Gears strip. Seals leak. And when a Pete Jackson unit failed... good luck finding a replacement part. After the company dissolved, the supply chain for their parts vanished. The engineers I work with now call that a "dead platform."
Verdict: Gear drives win on raw durability, but lose on repairability in the long run.
Danfoss VFDs, by contrast, are electronic. Their failure point isn't mechanical wear—it's heat and capacitor life. A well-maintained Danfoss VFD in a clean panel can easily run 15+ years. And if a capacitor goes bad? You can replace it (ugh, it's a pain) or swap the whole drive. Danfoss still makes and supports current models, so you aren't buying dead stock.
Programmability: The Danfoss VFD Difference
This is where the gap is widest. A gear drive does one thing: it turns an input shaft at a fixed ratio to an output shaft. Want a different speed? You physically change the gear set or swap pulleys. That's a machine shop job.
A Danfoss VFD, on the other hand, is a computer. You connect it to a motor, and then you can program virtually any speed-torque profile you want. The Danfoss VFD software (VLT Motion Control Tool or MCT 10) lets you do things like:
- Set precise acceleration/deceleration ramps
- Program for servo motor sewing machine applications (yes, they do that—surprisingly common in textile retrofits)
- Use the Danfoss VFD programming manual to configure alarm responses (the famous Alarm 60 is a torque limit warning)
I once had an engineer tell me, "If Pete Jackson had a VFD, they'd still be in business." That's an oversimplification (honestly, I'm not sure why they went under—my best guess is they couldn't adapt to the control demands of modern automation), but the point stands. The flexibility of a VFD makes it the obvious choice for any system that needs to change.
Let me share a specific example. We had a servo motor diagram from a 1990s-era system. It was a hand-drawn schematic with PIDs for closing the loop. With a Danfoss VFD and its built-in PID controller, we could replicate that performance without a separate controller card. That saved us an estimated $1,200 in parts and 15 hours of wiring time. (Not that I tracked it formally, but that was my rough calculation then.)
Support and Documentation: The Real-World Factor
This is the dimension that surprised me. I assumed gear drives were simpler and thus easier to support. But when Pete Jackson folded, all that institutional knowledge vanished. The wiring diagrams, the parts lists, the phone support—gone.
Danfoss, being a massive global company, is the opposite. The Danfoss VFD programming manual is available as a free PDF. The software is downloadable. Fans have compiled extensive resources (such as wiring diagram PDFs for common setups) in forums. Sure, you can't call a guy named Pete, but you can get support from certified Danfoss partners (which we vet for invoicing capability—learned that lesson in 2020 after a $2,400 expense rejection because a vendor couldn't produce a proper invoice).
The surprise wasn't the cost difference. It was how much hidden value came with the 'tried-and-tested' option—community documentation, standard protocols, and a clear upgrade path.
So, What Happened to Pete Jackson Gear Drives?
I've never fully understood the corporate story. My best guess is that they were a classic case of a well-engineered product failing to adapt to a market shift. The rise of VFDs meant that factories wanted programmability, not just durability. Pete Jackson couldn't (or didn't) pivot, and the company dissolved.
This is a pattern I see: the most reliable physical technology can be made irrelevant by software-defined alternatives. Danfoss VFDs are the future of motion control, purely because they can be updated and reprogrammed.
Which Should You Choose?
If you're dealing with a very simple, single-speed application where the gear drive is already installed and running perfectly, I'd lean toward leaving it alone. "5 minutes of verification beats 5 days of correction." Don't fix what isn't broken.
But if you're doing any of the following:
- Integrating with a PLC or automation system
- Need to change speeds frequently
- Are replacing a legacy system (especially one from a dead brand like Pete Jackson)
- Want energy savings (VFDs can cut motor power consumption by 30-50%)
...then the Danfoss VFD is the no-brainer. We've been standardizing on them for our retrofits (we're about 70% Danfoss now), and the maintenance guys haven't complained once.
One last thing: if you're looking at a Danfoss VFD programming manual and feeling overwhelmed, don't be. The basics are pretty straightforward. The software handles most of the complexity. We once had a summer intern (who knew nothing about VFDs) get a motor running at 30 Hz in about an hour using the software wizard. It's that approachable.
Just don't forget to save a copy of the EEPROM configuration before you mess with it (learned that one the hard way in 2018... ugh).