Redesign of the machine frame and hydraulic system has increased stiffness significantly, whilst reducing overall weight. Moving to a “two column” design has allowed the ergonomics to be greatly improved, giving better access to the hoppers and the tooling.
The rigid steel frame sits on rubber isolation feet, and the controls enclosure is mounted to one side. External panels are stainless steel, and all surfaces in the working area are polished approved materials.
Guard doors are designed to operate with a light touch, yet are robust to withstand frequent use. Electrical interlocks prevent inadvertent access and meet relevant guarding standards.
Access to the major components for maintenance has been improved by using a control enclosure with large double doors, and by using easily removable machine panels all round.
The machine incorporates two closed loop servo-hydraulic actuators by Instron, one mounted on the upper crosshead and the other below the lower crosshead. Hydraulic accumulators provide the instantaneous power for fast tests. Hydraulic supply is from a remote power unit, and noise levels in the laboratory are therefore comfortably low. |