Technical Support & Repair
Practical troubleshooting, parts sourcing, and repair options for Fortus® production systems and the Stratasys® F123 Series.
If your machine is down, we help you isolate the fault condition and get back to a normal operating state.
Fault isolation
Assembly repair
Core exchange
Belts / fans / wear parts
Production uptime
Fortus® 360mc · 380mc · 400mc · 450mc · 900mc · F900
F123 F120 · F170 · F270 · F370 · F770
Fast start Send model + exact screen message
Start Here (Fast Fault Routing)
Match your symptom to the right guide. If it’s unclear, send a photo of the operator message and your model.
Printing air / Not extruding
Ghost printing, “blocked-at-head”, weak flow, feed-path resistance, liquefier restriction.
Won’t home / Motion errors
Auto Home XYZ failures, Failed Auto Z, limit switch state issues, enable conditions, homing timeouts.
No boot / Power path
No power, black screen, controller not booting, UPS-related issues, reboot loops.
What to Send (So We Can Diagnose Fast)
- Printer model (example: Fortus 400mc or 900mc)
- Exact operator message text (photo preferred)
- When it happens: startup / homing / mid-build / during load
- Recent change: head swap, firmware update, material change, move/transport, power event
Tip: one clear phone photo of the message screen usually saves multiple back-and-forth emails.
Fortus®: Start With the 3 Core Failure Families
Most Fortus “machine down” searches fall into one of these three categories. These guides are built as cornerstone pages
— optimized for operator messages, symptom searches, and real repair paths.
1) Loss of Extrusion
Not extruding, ghost printing, blocked-at-head messages, liquefier restriction, feed-path resistance.
2) Motion Faults
Auto Home XYZ failures, Failed Auto Z, limit switch state issues, enable conditions, homing timeouts.
3) Startup / Boot Failures
No power, black screen, controller not booting, UPS-related power path faults, reboot loops.
How NEXT 3DP Helps
In many cases, OEM service paths default to replacing major assemblies. Our focus is to isolate the specific failure path first
(extrusion, motion, startup/power, thermal, safety/interlocks) before recommending replacement. That often makes the difference between a full assembly swap and a targeted repair.
Stratasys® F123 Series
F120 / F170 / F270 / F370 / F770 support — troubleshooting guidance and repair direction for common production interruptions.
We’ll expand F123-specific guides as the library grows.
Common F123 Scenarios
- Extrusion / material feed faults
- Motion errors and homing failures
- Heater / temperature stability issues
- Calibration and first-layer related interruptions
- Startup and communication issues
Not Sure Where to Start?
Send a photo of the screen with the exact message text and your model (F170/F370/etc.).
We’ll respond with the fastest next checks.
Support FAQ
What do you need from me to start?
Printer model, exact message text (or symptom), when it happens (startup / homing / mid-build), and a screen photo if possible.
Do you work with Canadian and U.S. customers?
Yes. We provide remote diagnostics and can support parts/repair planning based on your situation.
Do you only replace assemblies?
No. We focus on fault isolation first and then recommend the most practical repair path (targeted repair, parts, or exchange options when available).
Where should I start if I’m unsure?
Start with the 3 Fortus guides above. If the category isn’t clear, send a photo of the screen and we’ll point you to the right checks.
NEXT 3DP is an independent service provider and is not affiliated with or authorized by Stratasys Ltd.
