.ffrc-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
background-color: #f9f9f9;
border: 1px solid #e0e0e0;
border-radius: 8px;
box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}
.ffrc-header {
text-align: center;
margin-bottom: 30px;
color: #2c3e50;
}
.ffrc-section {
background: #ffffff;
padding: 20px;
border-radius: 6px;
border: 1px solid #ddd;
margin-bottom: 25px;
}
.ffrc-section h3 {
margin-top: 0;
color: #e67e22;
border-bottom: 2px solid #fceadc;
padding-bottom: 10px;
}
.ffrc-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 20px;
}
.ffrc-input-group {
margin-bottom: 15px;
}
.ffrc-input-group label {
display: block;
margin-bottom: 5px;
font-weight: 600;
font-size: 0.9em;
color: #555;
}
.ffrc-input-group input {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1em;
box-sizing: border-box; /* Ensures padding doesn't affect width */
}
.ffrc-input-group span.unit {
font-size: 0.8em;
color: #888;
float: right;
margin-top: -28px;
margin-right: 10px;
position: relative;
z-index: 2;
}
.ffrc-btn {
width: 100%;
padding: 12px;
background-color: #e67e22;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1em;
cursor: pointer;
transition: background 0.3s;
font-weight: bold;
margin-top: 10px;
}
.ffrc-btn:hover {
background-color: #d35400;
}
.ffrc-result {
margin-top: 20px;
padding: 15px;
background-color: #eefbfb;
border: 1px solid #bceceb;
border-radius: 4px;
text-align: center;
display: none;
}
.ffrc-result strong {
font-size: 1.4em;
color: #009688;
display: block;
margin-top: 5px;
}
.ffrc-content {
margin-top: 40px;
line-height: 1.6;
color: #333;
}
.ffrc-content h2 {
color: #2c3e50;
margin-top: 30px;
}
.ffrc-content p {
margin-bottom: 15px;
}
.ffrc-content ul {
margin-bottom: 20px;
padding-left: 20px;
}
.ffrc-content li {
margin-bottom: 8px;
}
@media (max-width: 600px) {
.ffrc-grid {
grid-template-columns: 1fr;
}
}
function calculateVolumetricFlow() {
// Get values
var layerHeight = parseFloat(document.getElementById('layerHeight').value);
var lineWidth = parseFloat(document.getElementById('lineWidth').value);
var printSpeed = parseFloat(document.getElementById('printSpeed').value);
// Validation
if (isNaN(layerHeight) || isNaN(lineWidth) || isNaN(printSpeed) || layerHeight <= 0 || lineWidth <= 0 || printSpeed <= 0) {
alert("Please enter valid positive numbers for all volumetric fields.");
return;
}
// Calculation: Volumetric Flow Rate = Layer Height * Line Width * Speed
var flowRate = layerHeight * lineWidth * printSpeed;
// Calculation: Estimated Max Speed (Generic assumptions for typical hotends)
// Standard V6 flow ~15mm3/s, Volcano ~25mm3/s. We won't output max speed based on flow cap here,
// but simply show the flow required.
// Display Result
var resultBox = document.getElementById('volumetricResult');
resultBox.style.display = 'block';
resultBox.innerHTML = "Required Flow Rate:
";
}
function calculateFlowCalibration() {
// Get values
var expectedWall = parseFloat(document.getElementById('expectedWall').value);
var measuredWall = parseFloat(document.getElementById('measuredWall').value);
var currentFlow = parseFloat(document.getElementById('currentFlow').value);
// Validation
if (isNaN(expectedWall) || isNaN(measuredWall) || isNaN(currentFlow) || expectedWall <= 0 || measuredWall <= 0 || currentFlow <= 0) {
alert("Please enter valid positive numbers for calibration fields.");
return;
}
// Calculation: New Flow Rate = (Expected / Measured) * Current Flow
var newFlowRate = (expectedWall / measuredWall) * currentFlow;
// Display Result
var resultBox = document.getElementById('calibrationResult');
resultBox.style.display = 'block';
resultBox.innerHTML = "New Calibrated Flow Rate:
Understanding 3D Printer Flow Rate
In the world of Fused Deposition Modeling (FDM) 3D printing, "Flow Rate" refers to two distinct but related concepts: the Volumetric Flow Rate (physics limit) and the Extrusion Multiplier (slicer setting). This calculator addresses both to ensure your prints are dimensionally accurate and structurally sound.
1. Volumetric Flow Rate (mm³/s)
Volumetric flow rate measures the volume of plastic your hotend must melt and push through the nozzle per second. Every hotend has a physical limit (e.g., a standard E3D V6 caps out around 15 mm³/s, while a high-flow Volcano might hit 25-30 mm³/s).
The Formula:
Volumetric Flow = Layer Height × Line Width × Print Speed
If you attempt to print faster than your hotend can melt the filament, you will experience under-extrusion, extruder skipping, or weak layer adhesion. Use the calculator above to check if your desired speed is safe for your hardware.
2. Calibrating Extrusion Multiplier (Flow %)
Even if your hardware can keep up, your printer might be pushing out slightly too much or too little plastic due to variations in filament diameter or extruder gear tension. This is corrected in your slicer (Cura, PrusaSlicer, Bambu Studio) using the "Flow" or "Extrusion Multiplier" setting.
How to Perform the Wall Thickness Test:
- Step 1: Print a hollow cube with no infill and no top layers. Set the wall count (perimeters) to 2.
- Step 2: Calculate the expected thickness. If your line width is 0.4mm and you printed 2 walls, the target is usually 0.8mm (though some slicers overlap slightly).
- Step 3: Measure the actual thickness of the printed walls with calipers.
- Step 4: Input the values into the second calculator above to find your ideal Flow Percentage.
Why is accurate Flow Rate critical?
Dimensional Accuracy: Over-extrusion causes parts to bulge, meaning holes will be too small and parts won't fit together.
Surface Finish: Too much flow creates "elephants foot" and rough top surfaces (scarring). Too little flow creates gaps between lines on the top layer.
Strength: Severe under-extrusion leads to weak bonds between layers, causing prints to snap easily.
Typical Maximum Volumetric Flow Rates
- Standard Hotend (MK8/V6): 10 – 15 mm³/s
- Bambu Lab X1/P1P: 20 – 24 mm³/s
- Volcano Hotend: 25 – 30 mm³/s
- High-End High Flow (Rapido/Dragon): 40 – 70 mm³/s