Blame for README.md

---
license: other
tags: [gr00t, isaac-gr00t, vla, isaac-lab, simulation, ffw-sg2, robotics]
base_model: nvidia/GR00T-N1.7-3B
---
# groot-blockpick-clean

GR00T N1.7 (3B) fine-tuned on the **clean** 500-demo top-down block-pick set (`padiredd/pick-cube-topdown-25cm-500-3cam`: ROBOTIS FFW SG2 in Isaac Lab, left-arm top-down pick of a lime-green block, 3 cameras at 240x240, 77,220 frames, fixed start pose, block uniform over x 0.23-0.48 / y 0.065-0.315 m, every demo with the same timing).
Checkpoints live in `step-<n>/` folders (this upload: `step-20000`, `step-40000`, `step-60000`, `step-80000`, `step-100000`); each folder loads with the ROBOTIS fork of Isaac-GR00T
(`omkarpatil18/Isaac-GR00T-n1.7` at e81d02b) via `Gr00tPolicy(embodiment_tag="new_embodiment", model_path=<folder>)` after
registering the modality config `modality_config/ffw_bg2_pick_cube_3cam_config.py` (state = arm_left 8 + arm_right 8, action = the
same 16 absolute joint targets, chunk 16, language "pick up the lime green block with the left arm").

## Fine-tune recipe
| | |
|---|---|
| base model | nvidia/GR00T-N1.7-3B (Cosmos-Reason2-2B backbone frozen; projector + diffusion action head tuned, 1.62 B trainable) |
| steps / batch | 100,000 planned, global batch 32, checkpoint every 20k |
| optimizer | lr 1e-4 cosine, warmup 5 %, weight decay 1e-5, AdamW, fp32 weights |
| image aug | colour jitter brightness 0.4 / contrast 0.4 / saturation 0.5 / hue 0.1 + 5 deg random rotation + the repo's random crop |
| state | 1 deg Gaussian noise on the 7 left-arm joints during training (our hook), state dropout 0.2 (repo default) |
| data sampling | shard 1024, episode sampling rate 0.1, 4 loader workers |
| hardware | NVIDIA A40 48 GB, 1.35 s/step, 4 loader workers |

Files per step folder: model shards (fp32, 12.6 GB), config.json, processor_config.json, statistics.json (normalization),
embodiment_id.json, experiment_cfg/, trainer_state.json. Optimizer, scheduler and RNG states are not uploaded.

## Evaluation
Sim rollouts (50 picks, same protocol as the diffusion policies in `padiredd/dp-blockpick-*`) are run with
`data_collection/rollout_policy.py --policy groot` against `groot_server.py`; results are added here as they come in.