Flexi RIP Security Key Not Found — Sai Rip Issues Part 10
Symptom → Hypothesis → Inspection → Solution
✅ Who Should Read This
- You see a “Security key not found” error when launching Flexi RIP
- Your USB Dongle (Lock key) is plugged in but not being recognized
- Your RIP program suddenly stopped working after a Windows update
- You need to quickly determine whether the issue is with the machine or the PC
⚠️ Caution (Protecting High-Cost Components)
- This issue is almost always a PC or USB recognition problem — not a printer issue
- Repeatedly unplugging and reinserting the Lock key can worsen contact issues
- A SafeNet Sentinel driver conflict is also possible — check in order before assuming hardware failure
- Whether the LED on the Dongle is on or off is the fastest first-step diagnostic
🧭 Quick Summary (Field Decision)
- Over 80% of “security key not found” errors are caused by a faulty USB port
- If the Lock key LED is off → try a different USB port first
- If the LED is on but still not recognized → likely a driver issue
- Many users assume it’s a machine problem — it’s almost always the PC
📋 Sai Rip Issues — Full Series
Real Sai Rip issues encountered in the field, documented in order. This list will be updated as new articles are added.
10
Flexi RIP Security Key Not Found
Flexi RIP Security Key Not Found
This is Part 10 of the Sai Rip series — what to do when you see the error message: “Security key not found.”
I. A Call from a Customer — Flexi RIP Security Key Not Found
Flexi RIP Security Key Not Found
A call from a customer
A shop owner contacted us saying that Sai Flexi RIP had been working perfectly until last week — but suddenly stopped working that morning.
- The RIP Lock key was still plugged into the PC as usual.
- The customer had recently purchased our printer after using a competitor’s machine, and had carefully tuned the color adjustment graph to match their existing product colors. They were understandably worried that all those settings might be lost.
- For reference, fine color adjustment in Sai Flexi RIP is covered here: Can a Chinese UV Printer Match the Color Output of a Japanese Machine Using Flexi RIP?
The customer’s voice was heavy when we first spoke.
“I’ve restarted the computer and the machine several times… nothing works. I’m at a loss.”
“This is a RIP software issue — it has nothing to do with the printer itself. All RIP software is registered online, and without the security key, it simply won’t run.”
“The USB Lock key you gave me is still plugged in. I don’t know what to do.”
II. Solution — Flexi RIP Security Key Not Found
Flexi RIP Security Key Not Found
The customer sent us a photo of the PC with the Lock key plugged in.
- As shown in the red dotted box, the Sai Flexi RIP Lock key is visible.
- Under normal operation, the LED on the Dongle should be blinking — but in this case, there was no light at all.
- A Windows update can sometimes cause this. If that’s the case, refer to this article: (Sai Rip Dongle USB Not Recognized — SafeNet Sentinel Driver Conflict Fix After Windows Update)
- The Lock key itself may also be physically damaged.
- Or the USB port on the computer may have failed.
“Could you try plugging the Lock key into a different USB port and check whether the LED comes on?”
“Oh — the light is blinking now. It’s on!”
“Great. Now try launching the RIP software again.”
“It’s working now!”
The root cause was a failed USB port on the PC where the Lock key had been plugged in. Switching to a different USB port resolved the issue immediately.
III. UV Printer Basics · Troubleshooting · Printable Products
All UV Printer content has been organized below. Click any item to go directly to that article.
1) Ink Supply
23 articles on print errors caused by ink supply issues including cleaning and pumping
2) Print Head Issues
12 articles covering everything from head replacement to head-related problems
Want to study print heads in depth: Print Head Basics — 9 Articles
3) Electronics / Software Issues
4) Mechanical Issues
5) Products You Can Make with a UV Printer
IV. ARTJET UV Printer
After more than five years of selling and servicing ARTJET UV printers, one thing stands out above all else.
Next to product reliability, the most critical factor is accumulated troubleshooting data.
Any machine can develop problems depending on the environment, work conditions, and operator experience. What truly matters in a production setting is not “a machine that never fails” — it’s:
How quickly and how accurately you can identify and resolve the issue when it occurs.
ARTJET continuously collects and organizes real-world problem data from the field to support faster and more precise troubleshooting.
🎥 Print Quality Sample
💰 ARTJET Pricing & Sales Conditions
(Note: Exterior design has been updated)
🧾 Full List of UV Printable Products
* Note: Exterior design has been updated.
※ This article is based on real field cases. Results may vary depending on your environment and machine configuration.