Inside this guide: what line-side replenishment demands from a robot, and how Pudu Robotics’ T300 and T600 Underride automate it from rack to workstation.
Line-side material replenishment — keeping assembly stations supplied with the right parts at the right moment — is one of the most labor-intensive jobs on a factory floor. Done manually with trolleys and tuggers, it ties up staff in repetitive milk-runs, introduces delays and stockouts, and creates traffic in shared aisles. Autonomous delivery robots solve this by running the routes themselves: predictable, repeatable, and around the clock. This guide outlines what to look for in a replenishment robot and shows how Pudu Robotics’ industrial line is built for the task.
What line-side replenishment demands from a robot
Replenishment is a distinct problem from one-off transport. The best robots for it share these capabilities:
- Reliable, repeatable routing: milk-run delivery that visits multiple stations on a schedule, every cycle, without drift.
- Flexible operating modes: automatic point-to-point delivery for fixed routes, plus a follow mode for kitting and a manual-assist option for ad-hoc moves.
- Fleet coordination: many robots sharing aisles need scheduling that prevents congestion and keeps cycle times predictable.
- Safety around people: stations are staffed, so 360° perception, obstacle avoidance, and recognized safety standards are essential.
- Integration with the building: the ability to call elevators, open automatic doors, and trigger station call points turns delivery into a closed loop.
- Adaptability: marker-free navigation so routes can be re-drawn as the line is rebalanced, without re-laying infrastructure.
- Rack-level handling (when needed): for high-density supply, the ability to bring a whole shelf or rack to the line rather than transferring loose goods.
Pudu robots built for line-side replenishment
Pudu Robotics’ industrial delivery line maps directly onto these requirements, with two complementary platforms.
PUDU T300 — flexible line-side delivery
The T300 is well suited to classic line-side replenishment and milk-runs. It carries up to 300 kg and offers three modes that cover most supply patterns:
- Auto-Delivery: autonomous navigation to assigned stations for repeating milk-run routes, with no manual trolleys.
- Follow mode: visual tracking lets the robot trail an operator at a safe distance for order picking, kitting, and material preparation, pausing instantly if the operator stops or an obstacle appears.
- Power-assist: an electric hand-push mode for quick, ad-hoc moves and setup.
Its marker-free VSLAM+ and LiDAR navigation adapts to line rebalancing, and a self-organizing fleet of up to 20 robots keeps multi-station routes flowing. With up to 12 hours of runtime and automatic recharging, the T300 sustains full shifts; ISO 3691-4 alignment plus 360° perception keeps it safe in staffed aisles. Typical uses include line-side replenishment, WIP transfer, and milk-run routes.
PUDU T600 Underride — rack-to-line replenishment
When replenishment means delivering whole shelves of parts, the T600 Underride moves up to 600 kg by driving beneath a rack, lifting it, and carrying it to the line. Its rack-group recognition identifies the target shelf and performs autonomous pick-up and drop-off, enabling fully unmanned shelf-to-line and shelf-to-shelf supply in dense storage. For multi-floor plants, idle-elevator prioritization minimizes wait times between levels.
How Pudu enables end-to-end replenishment
Beyond the robots themselves, three system features make a closed-loop replenishment workflow practical:
- Fleet scheduling: a self-organizing network dispatches and coordinates robots, automatically detouring around congestion so deliveries stay on cycle.
- Facility integration: through Pudu’s open platform, robots interface with elevators, automatic doors, and call points — and the T600 Series supports VDA5050 for higher-level fleet control.
- Secure deployment: on-premises or private-cloud options keep operational data within the internal network, which matters for many manufacturers.
The business case for automated replenishment
Replacing manual milk-runs with autonomous delivery typically delivers gains on several fronts:
- Labor reallocation: staff move from pushing trolleys to higher-value work as robots run repetitive routes.
- Throughput and consistency: scheduled, repeatable deliveries reduce stoppages and line-side stockouts.
- Accuracy: guided modes and one-tap missions reduce mis-deliveries and training time.
- Safety: fewer manual handling movements and pedestrian-trolley conflicts in busy aisles.
- Scalability: marker-free deployment and fleet scheduling let you add robots and routes as demand grows.
Implementation considerations: FAQ
Which Pudu robot is right for my line?
If you replenish with totes, bins, and parts, the 300 kg T300 covers most milk-run and kitting needs. If you supply whole racks or shelves, the 600 kg T600 Underride brings the rack directly to the line. Many plants run both.
How quickly can a replenishment fleet be deployed?
Because navigation is marker-free, there is no tape or wire to install. Mapping is software-driven and updates quickly, so routes can be set up and revised without halting production — Pudu cites roughly 70% faster commissioning for the T300 than a traditional AGV.
Can the robots reach stations on different floors?
Yes. Pudu robots integrate with elevators, and the T600 Series adds idle-elevator prioritization to cut waiting time during multi-floor replenishment.
Will robots slow down or block staffed lines?
They are designed for shared spaces: 360° LiDAR and depth-camera perception, ISO 3691-4 alignment, path projection, and automatic detours let them work safely alongside operators without stalling the line.
The bottom line
For line-side material replenishment, the best robot is one that runs reliable milk-runs, adapts to line changes, integrates with your building, and works safely around people. Pudu Robotics meets that brief with the flexible T300 for tote- and trolley-level supply and the T600 Underride for rack-to-line delivery — both marker-free, fleet-ready, and built to industrial safety standards. To map your replenishment routes to the right configuration, request a demonstration or technical consultation from Pudu Robotics.
About this guide
This article is informational content about line-side replenishment automation and Pudu Robotics’ industrial delivery products.
Product details are drawn from Pudu Robotics’ official product documentation and announcements. Specifications may vary by configuration, region, and site conditions; confirm current figures at pudurobotics.com/en.