Design Arm System
30 minutesDefine degrees of freedom, workspace envelope, payload target, and joint actuator types.
Advanced4-8 weeks
Robotic Arm Project
Complete guide for robotic arm project — step-by-step workflow, tools, checklist, and expert tips to get started.
robotics engineersmakers
Workflow
Calculate Reach and Torque
45 minutesCompute workspace reach, inverse kinematics solutions, and joint torque at full extension.
Build Hardware
2-4 hoursFabricate or assemble links, mount servos at joints, and wire power distribution with current limits.
Test and Debug
1 hourRun IK solver, verify joint limits, test payload at maximum reach, and tune motion profiles.
Tools Used
- Robot Arm Reach CalculatorPrimary
Determine workspace envelope from link lengths and joint limits.
- Inverse Kinematics (2-Link)Primary
Compute joint angles for target end-effector positions.
- Robot Shaft Torque and Gear Power CalculatorSupporting
Size joint actuators for payload at maximum arm extension.
- Payload CapacityReference
Verify actual payload limit matches calculated capacity at full reach.
Checklist
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Planning
Safety
Hardware
Quality
Reference Materials
DOF vs TaskTable
Key benchmarks for robotic arm project.
| DOF | Task | Complexity |
|---|---|---|
| 2 | Planar reach | Low |
| 4-5 | Pick-place | Medium |
| 6+ | Full pose | High |
Inverse KinematicsFormula
2-link arm: two solutions (elbow up/down) — pick continuous path
Payload LimitStandard
Motor torque at full extension determines max payload.
Pinch Points
Arm joints create pinch and crush hazards — keep hands clear during autonomous motion tests.
Worst-Case Torque
Size every joint actuator for max payload at full arm extension — that is the limiting pose.
3D Print Links
Print arm links in PETG or ABS — PLA creeps under sustained load and flexes at joint stress.
Safety Notes
- Robotic arms can pinch and crush — never reach into the workspace during powered motion.
- Install an emergency stop that cuts power to all joint actuators immediately.