t000__ep008__blocks
- suite / variant:
/ - instruction: Stack the yellow block on the wooden block
- success: False
- control steps: 381 (7.4s at 52 Hz)
- policy inferences: 66 (replan_steps=6)
- video:
blocks/ep008/rollout.mp4 - features:
66prefix tensors (prefix; model=``)
Semantic timeline
| seconds | control_step | policy_step | phrase |
|---|---|---|---|
| 0.0–3.0 | 0–154 | 0–25 | approaching yellow block |
| 3.0–6.0 | 155–309 | 25–51 | closing gripper and missing grasp |
| 6.0–7.4 | 310–380 | 51–63 | retracting empty gripper |
Failure
- yes
- onset type: obvious_mistake
- onset: 4.050387596899225 s (00:04.1)
- frame / control_step: 209 (policy_step=34, chunk_index=5)
- coarse onset: 4.0 s (refined=True)
- mode: grasp_failure
- reason: The robot closed its gripper on the yellow block, but failed to establish a secure grip, causing the block to slip out as the arm lifted. Summary: improper grasp alignment; failed object pick-up
- recovery: Re-align the gripper directly over the yellow block, close the fingers securely around it, lift it, and stack it onto the wooden block. Summary: re-align gripper; regrasp yellow block; stack on wooden block
- prevention: Ensure the gripper is properly centered and at the correct height over the yellow block before closing the fingers to guarantee a solid grasp. Summary: center gripper on block; close gripper securely
- justification: At 4.0 seconds, the robot attempts to close its gripper around the yellow block, but the block pops out of the fingers as the arm begins lifting, leaving the block on the table.