Technical Insights — Controls
CNC Control Systems: Mazatrol, Fanuc, Siemens, Heidenhain, OSP
The control is often the limiting factor, not the iron. This pillar covers the diagnostic reasoning, retrofit decisions, and parts-availability reality for the five major control platforms we service. Alarm codes, generation jumps, legacy-control support, and the control-vs-mechanical fault distinction.
Articles in this series
1 published so far. 14 more drafting — we publish when the work on the bench warrants writing it down.
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Mazatrol Matrix vs. Smooth: When to Upgrade
Mazatrol Matrix-to-Smooth retrofits run roughly $35K to $80K and ship in 8 to 16 weeks. The three questions we walk customers through before quoting either the upgrade or a targeted rebuild.
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Coming soon
Fanuc Alarm 401: Causes and Recovery
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Coming soon
Heidenhain TNC Retrofit: When It's Worth It
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Coming soon
Siemens 840D vs. 840Dsl: What's Different
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Coming soon
Okuma OSP-P200 to P300: Practical Impact
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Coming soon
Legacy CNC Control Parts: What's NLA in 2026
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Coming soon
Mazatrol Legacy Screen Failure: Replacement Options
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Coming soon
CNC Battery Backup Loss: Data Recovery Procedure
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Coming soon
Servo Drive vs. CNC Controller Faults: How to Distinguish
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Coming soon
Control or Mechanical? The Diagnostic Logic
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Coming soon
Fanuc Series 0 to 0i: Upgrade Reality
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Coming soon
Encoder Feedback Faults: Control or Mechanical?
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Coming soon
PLC Ladder Logic Faults in CNC Machines
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Coming soon
Heidenhain iTNC 530 vs. TNC640: Real-World Differences
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Coming soon
Why Your Control May Be the Limiting Factor
When you need the work done
These articles are working notes — diagnostic logic, decision frameworks, the cost-and-lead-time math. For the service itself (quotes, scheduling, what we actually do on the bench and in the field), the page is at /repairs/.