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The top surface of a large cast iron plate is to be face milled. The area to be machined is 400 mm wide and 700 mm long.
The part in Figure is to be miffed, using a 20-mm diameter end mill with four teeth. Write the APT geometry and motion statements for this job.
Two stepping motors are used in an open-loop system to drive the leadscrews for x-y positioning. The range of each axis is 250 mm.
One axis of an NC positioning system is driven by a stepping motor. The motor is connected to a leadscrew whose pitch is 4.0 mm.
The worktable in an NC positioning system is driven by a leadscrew with a 4-mm pitch. The leadscrew is powered by a stepping motor that has 250 step angles.
A stepping motor with 200 step angles is coupled to a leadscrew through a gear reduction of 5:1.
The motor is coupled directly to the leadscrew for the axis, and the leadscrew pitch = 5 mm.
The worktable of an NC machine is driven by a closed-loop positioning system that consists of a servomotor, leadscrew, and optical encoder.
A NC machine tool table is powered by a servomotor, Ieadscrew, and optical encoder.
A leadscrew coupled directly to a de servomotor is used to drive one of the table axes of an NC milling machine. The leadscrew has 2.5 threads/cm.
A milling operation is performed on an NC machining center. Total travel distance = 300 mm in a direction parallel to one of the axes of the worktable.
A de servomotor drives the x-axis of an NC milling machine table. The motor is coupled directly to the table leadscrew, whose pitch = 6.25 mm.
A two-axis NC system is used to control a machine tool table uses a bit storage capacity of 16 bits in its control memory for each axis.
Write the complete APT part program to perform the profile milling operation for the part drawing. Tooling = 20-mm diameter end.
Analyze each of the following control systems and determine whether they have self-regulation, what the process load would be, what would constitute a transient
Construct a narrative statement outline of the event sequence for the system shown in Figure. The objective is to fill bottles moving on a conveyor.
The system of Figure has the following functions: move a work piece into position, clamp it, start the drill, move it down to drill a hole in the work piece.
All switches are NO. Thus, TH closes when the temperature reaches TH, L1 closes when the level exceeds L1, and so forth.
During the 8-hour light period, nutrient must be cycled into the vat every 2 hours and left for 2 hours.
Define the variables in the system of Figure that constitute the process load.
A velocity control system has a range of 220 to 460 mm/s. If the setpoint is 327 mm/s and the measured value is 294 mm/s, calculate the error as percentage of s
If the speed is controlled by a 25- to 50-V dc signal, calculate (a) the speed produced by an input of 38 V, and (b) the speed calculated as a percent of span.
A 5-m-diameter cylindrical tank is emptied by a constant outflow of . A two-position controller is used to open and close a fill valve with an open
Develop the physical ladder diagram for a motor with the following: NO start button, NC stop button, thermal overload limit switch opens.