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Preparation Work

Account for setup and pre-print labor costs

Overview

Preparation work includes all the technical tasks required before a print can start. This skilled labor often requires more expertise than post-processing and should be valued accordingly.

Model Preparation Time

What Is Model Prep?

Time spent preparing the 3D model file before slicing. This can range from quick file checks to extensive repairs.

Common Tasks:
• Importing and inspecting model files
• Checking for errors (non-manifold geometry, holes)
• Repairing mesh issues
• Scaling to correct dimensions
• Orienting for optimal printing
• Adding drainage holes or supports manually
• Separating parts for multi-piece prints
• Hollowing solid models

Typical Time Estimates

Clean, print-ready file0 - 0.1 hours (0-6 min)
Minor adjustments (scale, orient)0.1 - 0.25 hours (6-15 min)
Mesh repairs and optimization0.25 - 0.5 hours (15-30 min)
Extensive repairs or modifications0.5 - 2+ hours (30-120+ min)

Note: Client-provided files often require more prep time than professionally designed models.

Slicing Time

What Is Slicing?

Configuring print settings in your slicer software and generating the G-code file for the printer.

Tasks Involved:
• Selecting print profile (quality, speed)
• Setting layer height and infill
• Configuring support structures
• Adjusting temperatures and speeds
• Adding custom supports if needed
• Previewing and checking for issues
• Running the slicing process
• Reviewing estimated time and material

Typical Time Estimates

Standard profile, no supports0.05 - 0.1 hours (3-6 min)
Custom settings with supports0.1 - 0.25 hours (6-15 min)
Complex part requiring optimization0.25 - 0.5 hours (15-30 min)
Multi-material or experimental settings0.5 - 1+ hours (30-60+ min)

Tip: Testing new materials or complex geometries often requires multiple slicing attempts.

Material Change Time

What Is Material Change?

Time spent swapping filament when changing materials or colors between prints.

Process Includes:
• Unloading current filament
• Loading new filament
• Purging until clean (color change)
• Temperature adjustments if needed
• Verifying flow and quality
• Cleaning nozzle if required

Typical Time Estimates

Same material, different color0.05 - 0.1 hours (3-6 min)
Different material type0.1 - 0.15 hours (6-9 min)
Specialty material (needs purge)0.15 - 0.25 hours (9-15 min)

Important: Changing from dark to light colors may require extensive purging to avoid contamination.

Transfer & Start Time

What Is Transfer & Start?

The final steps to get your print started and verify it begins correctly.

Tasks Included:
• Transferring G-code to SD card or network
• Preparing the print bed
• Applying adhesion aids (glue, tape, etc.)
• Starting the print
• Monitoring first layer adhesion
• Waiting to verify print starts correctly
• Making initial adjustments if needed

Typical Time Estimates

Network transfer, clean bed0.05 - 0.1 hours (3-6 min)
SD card, bed prep needed0.1 - 0.15 hours (6-9 min)
Difficult material (adhesion aids)0.15 - 0.25 hours (9-15 min)

Best Practice: Always wait to verify the first layer is adhering properly before walking away.

Preparation Hourly Rate

Setting Your Rate

The default rate is $20/hour. Preparation work often requires more technical skill than post-processing, so many operators charge a higher rate.

Rate Considerations:
• Technical knowledge required
• Software expertise (CAD, slicer)
• Experience with different materials
• Ability to troubleshoot issues
• Understanding of print optimization

Suggested Rates by Skill Level

Basic setup (standard files)$20 - $25/hour
Intermediate (repairs, optimization)$25 - $35/hour
Expert (CAD, complex preparation)$35 - $60/hour

How It's Calculated

Example Calculation

Time Inputs:
Model Prep:0.25 hours (15 min)
Slicing:0.15 hours (9 min)
Material Change:0.1 hours (6 min)
Transfer & Start:0.1 hours (6 min)
Total Time:0.6 hours
Cost Calculation:
Hourly Rate:$20/hour
Formula:0.6 hours × $20
Preparation Cost:$12.00

Best Practices

Track File Complexity

Client-provided files usually need more prep. Build extra time into quotes for uncertain file quality.

Consider Learning Curve

New materials or techniques take longer. Charge appropriately for experimental or first-time setups.

Value Your Expertise

Preparation requires technical knowledge. Don't undercharge for skilled work like mesh repair or optimization.

Bundle Related Tasks

If you're changing material anyway, include that time. Don't forget the little tasks that add up.

Related Articles

Basic Inputs

Printer, filament, and print parameters

Post-Processing

Labor costs for finishing work