t000__ep031__blocks
- suite / variant:
/ - instruction: Stack the yellow block on the wooden block
- success: False
- control steps: 364 (7.3s at 50 Hz)
- policy inferences: 63 (replan_steps=6)
- video:
blocks/ep031/rollout.mp4 - features:
63prefix tensors (prefix; model=``)
Semantic timeline
| seconds | control_step | policy_step | phrase |
|---|---|---|---|
| 0.0–3.0 | 0–149 | 0–24 | lowering arm toward yellow block |
| 3.0–6.0 | 150–299 | 25–49 | closing gripper; lifting empty |
| 6.0–7.3 | 300–363 | 50–60 | hovering empty gripper above block |
Failure
- yes
- onset type: obvious_mistake
- onset: 4.06 s (00:04.1)
- frame / control_step: 203 (policy_step=33, chunk_index=5)
- coarse onset: 4.8 s (refined=True)
- mode: grasp_failure
- reason: The robot aligned with the yellow block and attempted to grasp it, but the gripper slipped during closure, failing to hold the block as the arm lifted. Summary: grasp failed; yellow block not acquired
- recovery: Lower the arm back down, reposition the gripper over the center of the yellow block, securely close the fingers around it, and resume stacking on the wooden block. Summary: reposition gripper; regrasp yellow block; stack on wooden block
- prevention: Ensure precise alignment and grasp depth over the yellow block before closing the gripper so that it is firmly held during lifting. Summary: center gripper over block; secure grasp before lifting
- justification: Around 4.8 seconds into the video, the robot closes its gripper on the yellow block, but fails to establish a stable grasp. The fingers close completely while the yellow block remains on the table, and the arm lifts up empty.