A step conveyor, with feed unit and control module is designed to improve throughput times, productivity and profits at assembly shops undertaking production line screwdriving tasks.

A new step conveyor, the ZSL 151 feed unit and control module from Weber Automatic Assembly Systems, is designed to improve throughput times, productivity and profits at assembly shops undertaking production line screwdriving tasks. Repeatability and accuracy are the most important criteria when undertaking high throughput assembly operations, where operating efficiency is a number one priority. Output levels of 5000 parts/hour (for an M4x30 screw) are easily achievable using the ZSL 151, capable of matching or exceeding most modern assembly production targets.

Fastening elements (screws, bolts or nuts) are loaded into a stainless steel bowl as bulk material.

Fastener items are then transferred to the exit track by stroke step, before being aligned on the conveyor, selected by an escapement and fed to the screwdriving unit.

This unit, together with the feed system and screwdriving process are fully controllable using an integrated programmable PLC.

The pneumatic ZSL 151 has been designed with a low vibration exit track, ensuring a smooth operation and noise levels that do not exceed 76dBA.

Also, the fasteners are never moved unnecessarily, hence the unit is ideal for screws, bolts or nuts with coatings, paint finishes or delicate surfaces.

This compact unit measures just 420 by 600 by 400mm and runs off 230V power supply and a 6 bar compressed air connection.

It has a 1.5 litre parts capacity (with optional automatic filling bunker) and the stroke and slider adapt automatically to the filling level.