$316$

Chapter $9$

Figure $9-5.$ Drilling machine application. $($This circuit is simulated on the CD included with textbook.$)$

The application is for a drilling machine, where the following operations take place:

The spring$-$centered position gives rapid spindle advance $($extension$).$

The left envelope mode gives slow feed $($extension$)$ when the drill starts to cut into the workpiece.

The right envelope mode retracts the piston$\mathrm{.}316$

Chapter $9$

Figure $9-5.$ Drilling machine application. $($This circuit is simulated on the CD included with textbook.$)$

The application is for a drilling machine, where the following operations take place:

The spring$-$centered position gives rapid spindle advance $($extension$).$

The left envelope mode gives slow feed $($extension$)$ when the drill starts to cut into the workpiece.

The right envelope mode retracts the piston.

Regenerative Circuits

$9-13$E$.$ When the directional control valve in the system of Figure $9-5$ returns to its center position, the cylinder rod moves in a given direction. Is this direction extension or retraction? During this movement determine the force and velocity. The piston and rod diameters are $3$ in and $1$ in $,$ respectively. The pump flow rate is $2$ gpm and the system pressure is $1000$ psi $.$

Regenerative Circuits

$9-13$E$.$ When the directional control valve in the system of Figure $9-5$ returns to its center position, the cylinder rod moves in a given direction. Is this direction extension or retraction? During this movement determine the force and velocity. The piston and rod diameters are $3$ in and $1$ in $,$ respectively. The pump flow rate is $2$ gpm and the system pressure is $1000$ psi $.$

$316$

Chapter $9$

Figure $9-5.$ Drilling machine application. $($This circuit is simulated on the CD included with textbook.$)$

The application is for a drilling machine, where the following operations take place:

The spring$-$centered position gives rapid spindle advance $($extension$).$

The left envelope mode gives slow feed $($extension$)$ when the drill starts to cut into the workpiece.

The right envelope mode retracts the piston.