220-1101 · Question #681
220-1101 Question #681: Real Exam Question with Answer & Explanation
The correct answer is D: Raise the filament flow amount.. {"question_number": 5, "question": "Printing with TPU filament-the first layer on every print job is not adhering properly...", "correct_answer": "D. Raise the filament flow amount.", "explanation": "TPU (thermoplastic polyurethane) is a flexible, elastic filament that is prone t
Question
A user is printing a part with a thermoplastic polyurethane (TPU) filament on a 3-D printer. The first layer on every print job is not adhering properly. Which of the following should the user do to improve adherence on the first layer?
Options
- ALower the print bed temperature.
- BAdjust the RPM of the cooling fan.
- CIncrease the print speed.
- DRaise the filament flow amount.
Explanation
{"question_number": 5, "question": "Printing with TPU filament-the first layer on every print job is not adhering properly...", "correct_answer": "D. Raise the filament flow amount.", "explanation": "TPU (thermoplastic polyurethane) is a flexible, elastic filament that is prone to first-layer adhesion issues. Increasing the filament flow amount (extrusion multiplier) deposits more material on the first layer, increasing contact area with the print bed and improving adhesion. Lowering bed temperature would reduce adhesion further. Increasing print speed causes underextrusion with TPU, which is already prone to it due to its flexibility. Adjusting fan RPM affects cooling, not adhesion of the initial layer.", "generated_by": "claude-sonnet", "llm_judge_score": 4}
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