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Add printer cost (€0.35/h) to price estimation

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Adds depreciation/electricity as a separate line item in the production
cost breakdown. Included in the markup base so it contributes to margin.
Configurable via PRINTER_COST_PER_HOUR env var (default 0.35).
Bracket gross total updates automatically.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Martin Hohenberg
2026-06-19 07:28:46 +02:00
parent c94eeb071f
commit 0569cd4f02
2 changed files with 23 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
app/estimation.py
View File

@@ -46,11 +46,12 @@ def estimate(volume_ccm: float, material: str | None) -> dict:
PRINT_SPEED_G_PER_HOUR (env, default 32):
~32 g/h matches Bambu Lab at normal quality; use ~20 for slower printers.
"""
vat_rate = float(os.environ.get("VAT_RATE", 19))
price_per_kg = float(os.environ.get("FILAMENT_PRICE_PER_KG", 15))
base_factor = float(os.environ.get("MATERIAL_FACTOR", 0.50))
print_speed = float(os.environ.get("PRINT_SPEED_G_PER_HOUR", 32))
density = _DENSITY.get(material or "", _DEFAULT_DENSITY)
vat_rate = float(os.environ.get("VAT_RATE", 19))
price_per_kg = float(os.environ.get("FILAMENT_PRICE_PER_KG", 15))
base_factor = float(os.environ.get("MATERIAL_FACTOR", 0.50))
print_speed = float(os.environ.get("PRINT_SPEED_G_PER_HOUR", 32))
printer_cost_per_hour = float(os.environ.get("PRINTER_COST_PER_HOUR", 0.35))
density = _DENSITY.get(material or "", _DEFAULT_DENSITY)
eff_factor = _effective_factor(volume_ccm, base_factor)
material_ccm = volume_ccm * eff_factor
@@ -59,18 +60,21 @@ def estimate(volume_ccm: float, material: str | None) -> dict:
filament_cost = weight_g / 1000 * price_per_kg
after_misprint = filament_cost * 1.20
net_price = after_misprint * 1.30
printer_cost = (print_minutes / 60) * printer_cost_per_hour
net_price = (after_misprint + printer_cost) * 1.30
gross_price = net_price * (1 + vat_rate / 100)
return {
"material_ccm": round(material_ccm, 2),
"weight_g": round(weight_g, 1),
"print_minutes": print_minutes,
"filament_cost": round(filament_cost, 2),
"net_price": round(net_price, 2),
"gross_price": round(gross_price, 2),
"vat_rate": vat_rate,
"price_per_kg": price_per_kg,
"material_factor": eff_factor,
"print_speed": print_speed,
"material_ccm": round(material_ccm, 2),
"weight_g": round(weight_g, 1),
"print_minutes": print_minutes,
"filament_cost": round(filament_cost, 2),
"printer_cost": round(printer_cost, 2),
"net_price": round(net_price, 2),
"gross_price": round(gross_price, 2),
"vat_rate": vat_rate,
"price_per_kg": price_per_kg,
"material_factor": eff_factor,
"print_speed": print_speed,
"printer_cost_per_hour": printer_cost_per_hour,
}

3
app/templates/job_detail.html
View File

@@ -155,6 +155,7 @@
{{ (estimation.material_factor * 100) | round | int }}% material factor
· {{ estimation.print_speed | int }} g/h
· {{ estimation.price_per_kg }} €/kg
· {{ estimation.printer_cost_per_hour }} €/h printer
· {{ estimation.vat_rate }}% VAT
</span>
</div>
@@ -188,6 +189,8 @@
<td class="border-0">{{ "%.2f"|format(estimation.filament_cost) }} €</td></tr>
<tr><td class="text-secondary">+ 20 % misprint</td>
<td>{{ "%.2f"|format(estimation.filament_cost * 1.2) }} €</td></tr>
<tr><td class="text-secondary">Printer ({{ estimation.printer_cost_per_hour }} €/h)</td>
<td>{{ "%.2f"|format(estimation.printer_cost) }} €</td></tr>
</tbody>
</table>
</div>