IEMCA MASTER 880-VERSO F, Manual For Use And Maintenance

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EN
2 - TECHNICAL INFORMATION MASTER 880/880r VERSO
2 - Pag. 34 / 34
2.7 ACCESSORIES - FOREWORD
To increase the bar feeder performance and flexibility, it may be provided with the accessory
described below.
2.7.1 Bush holder device - Description
It is applied to the front part of the bar feeder. Its
function its to reduce bar vibrations to a minimum,
by keeping the bar centred during the rotation by
means of two half-bushings (A), which are coupled
to form a round guide channel with a diameter just
slightly larger than the one of the bar being
machined.
In many cases, this device may be used (by only
changing the diameter of the half-bushings) to
greatly extend the range of diameters which can be
machined without having to replace the guide
channel.
OPERATION
• When the bar is dropped into the guide channel,
the two half-bushes are open.
• The closing phase is controlled by a pneumatic
cylinder when the bar feeder has completed the bar loading cycle. The oil flow for the
machined bar lubrication and support starts together with the closing phase.
• When the bar pusher approaches the device, the half-bushes open up to allow its passage;
the oil flow stops.
• By enabling subparameter B of Parameter 17 (see INSTRUCTION MANUAL, sec 2) it is
possible to close the half-bushings (A) on the bar pusher, making the approach to the lathe
spindle liner more stable.