Manual Robland NXTZ (page 6 of 46) (English)

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NX SERIES V0913 5

– English

8 Functioning of the machine, choice of safety equipment and adjustment

Because of the various tasks that can be carried out with the various types of spindle shafts, spindle

holders and cutter blocks, different types of safety equipment must be used. Every operation must be

examined separately and then the correct guarding must be chosen. The minimal opening in the table

also depends on the type of cutter block, diameter of the knives and height in which the cutter block is

adjusted. This can be done by using the able insert rings which are delivered with the machine. In that

way, the opening is as small as possible and the piece can no longer ip over and hit the knives.

Using a power feeder can prevent most serious accidents involving the hands. Such feeders can easily

be adjusted and adapted to the size of the pieces.

When no power feeder is used, the wood pushers must be used, the horizontal and vertical springs

making a tunnel in which the piece can be slid. This pusher, together with other safety equipment,

reduces the gap between the cutting tool and the guide fences.

9 Working with the spindle fence when the total length of the piece has to be machined

In most cases a straight guard fence is used. The pieces can therefore be guided in the angle made

by the table and the fence. The vertical and horizontal pushers can be placed in such way that they

make a tunnel in which the rst piece can be pushed. The second piece is then used to push the rst

one, the last piece is pushed forward with a wood pusher. Special blocks must be used relative to the

dimensions of the piece. When working panels of small thickness, only the top of the spring may be

used, on condition that the thickness matches.

On a spindle-moulder, the distance between the 2 extremities of the spindle guard fence must be large

enough to leave enough space for the cutter block. Thus the knives, the cutter block and the spindle

shaft may be exposed and extremity of the piece may come in contact with nose of the exit spindle

guard fence. There risks can be avoided by using a false fence between the 2 spindle guard fences

thus limiting the opening between them.

10 Working with the spindle fence when only a part of the piece is machined

When working with the spindle fence and this between 2 stops xed onto the machine table or fences,

only a part of the work piece is machined. By doing so, the cutting tool starts to machine the wood in

the full section of the wood and does not start at the front, where the cutting action is more gradual

and less severe. The cutting action is stopped before the work piece end is reached. This action is

very dangerous and needs special care and attention. A stop solidly xed at the front and back, must

be used (see the example further in this manual)! A piece may only be guided by hand when it is

sufficiently large, in all other cases a gauge or a support with protection must be used in order to avoid

serious accidents. By means of the gauge, the piece can be quickly and precisely be put into place

and rmly held there. A quick clamping system, working with tumblers or with cams, is most practical

system to hold the piece. When the front and backstops are xed to the spindle guard fence or to the

table, a better control of the gauge is possible.

11 Working with the ring guard

When working with the ring guard, a support must be used, except when a certain process does not

allow this, i.e. when the piece is too large to make the use of the support practical, or when the piece is

so small or so difficult to machine that it cannot be held in the support without danger. The nal shape

is obtained by holding the gauge against a guidance bearing which is xed to the spindle while the

piece is held against the tool. The gauge can be part of the support.

12 Chamfering

When chamfering a solid support or a tilt able adjustable spindle guard fence must be used. A wood

pusher must be used for the nal part of the machining.

13 Working in the same direction as the tools

It is extremely dangerous to work in the same direction as the tools, as the operator cannot exert force

to resist the strong movement of the piece as the tool comes into contact with it. Working in the same

direction as the tools as absolutely forbidden, even when a support is used.

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Robland NXTZ Manual

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