Jung J630D, Manual

Page: 283 / 316

J630D
9. Maintenance / servicing / disposal 26.7.02 277
9.2 Setting the table reversal and limit positions in the X-axis with
hydraulic valves
The hydraulic valves for setting the limit positions and the table reversal are loca-
ted on the left-hand side of the machine bed. These valves are set correctly in the
factory and do not need to be adjusted for normal grinding operation. If it seems
to you that the table reversal or the approach to the limit positions is too hard or
too soft, you can correct it using these two valves.
The hydraulic valves are located on the left-hand side of the machine bed.
• Open the clamping bolt of the valve you want to adjust with a hollow hexagon
wrench.
– Turn the table reversal valve anti-clockwise to make the reversal path shor-
ter and harder. Turn it clockwise to make the reversal path longer and softer.
Always mark the original setting before adjusting either of these val-
ves.
Be careful not to turn the valve too far clockwise, because this could
make the reversal path so long that both limit switches are overtra-
velled when the table is reversed. A double infeed takes place as a
result. A reversal path that is too hard and too short causes the
machine to vibrate excessively. The machine may be damaged and
your grinding results may deteriorate.
Valve for setting hydrau-
lic table reversal
Valve for hydraulic ap-
proach to limit positions