how can i improve my 3d CNC model any ideals to improve it ?

Simplify Geometry – Avoid complex curves; use 2.5D features where possible.

Add Fillets/Chamfers – Match internal corner radii to your tool size.

Avoid Thin Walls – Keep thickness ≥2× tool diameter.

Minimize Overhangs – Use draft angles (1-3°) for easier machining.

Optimize for Material – Design to fit standard stock sizes.

Reduce Machining Time – Limit deep pockets, unnecessary details.

Check Tolerances – Ensure critical dimensions account for tool deflection.

Test with CAM Simulation – Verify toolpaths before machining.

I just took a look, and it seems fine to me. Have you already assembled it? I might be able to provide some tips to simplify the assembly process, like adding alignment features or stop edges for easier fine-tuning.

I can give some advice for visualization. You can use bolts and nuts. Maybe you should design transparent rubber cover for your rails. And cables looks amazing in machine designs.

Chain cable cover example: Cable drag chain wire 18*25*R28

Great start on your 3D CNC model! To improve it further, consider optimizing your toolpaths to reduce machining time and material stress—perhaps by minimizing sharp internal corners or adjusting fillet radii to suit your endmill sizes. Also, double-check your tolerances for any moving parts to ensure a smoother assembly. I mostly work on sustainable design and DIY gardening setups over at The potager project , but I find a lot of crossover when it comes to precision and efficient use of resources. Looking forward to seeing your next iteration!

Nice work so far! A few ideas that might help your CNC model even more:
• Adjust your internal corners and fillets to match your end-mill size so there are no sharp inside corners.
• Check your wall thickness—keeping it at least twice the tool diameter helps avoid fragile parts.
• Run a CAM simulation to see possible toolpath issues (collisions, tool deflection, etc.).
• Add alignment features or assembly aids if your model has multiple parts.
• Minimize overhangs or steep angles if you want easier machining—draft angles of ~1-3° can make a difference.
Looking forward to seeing the next iteration!