Ryobi P112 Manuel d'instructions Page 262

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Vue de la page 261
CHAPTER 2 MACHINE OPERATIONS
6. Operation Switch Functions and Other Functions
II – 39
6.21 Rapid traverse constant inclination acceleration/deceleration
This function carries out acceleration/deceleration at a constant inclination during the linear acceleration/
deceleration in the rapid traverse mode.
The constant inclination acceleration/deceleration method is effective in improving the cycle time
compared to the conventional method.
(1) Detailed explanation
The rapid traverse constant inclination acceleration/deceleration is valid only during a rapid traverse
command. It is also valid only when the rapid traverse command's acceleration/deceleration mode is
linear acceleration or linear deceleration.
The acceleration/deceleration patterns when rapid traverse constant inclination acceleration/
deceleration is used is shown in the next section.
(a) When interpolation distance is longer than acceleration/deceleration distance
rapid
Ts
T
L
Next block
Ts
Td
θ
(b) When interpolation distance is shorter than acceleration/deceleration distance
rapid
θ
Ts
T
Next block
Td
The time required for the command deceleration check during rapid traverse constant inclination
acceleration/deceleration is the rapid traverse deceleration check time for each axis, determined by
the simultaneously commanded axes' rapid traverse rate, rapid traverse acceleration/deceleration
time constant and interpolation distance. The longest of the axis times is used.
When two-axis simultaneous interpolation (linear interpolation) is carried out during rapid traverse
constant inclination acceleration/deceleration, the acceleration/deceleration time of each axis will be
the acceleration/deceleration time of each axis determined by the simultaneously commanded axes'
rapid traverse rate, rapid traverse acceleration/deceleration time constant and interpolation distance.
The longest of the axis times is used. Thus, linear interpolation is carried out even when the
acceleration/deceleration time constant for each axis is different.
rapid: Rapid traverse rate
Ts : Acceleration/deceleration
time constant
Td : Command deceleration
check time
θ : Acceleration/deceleration
inclination
T : Interpolation time
L : Interpolation distance
Td = + (0 to 14ms)
T
2
θ
= tan
–1
( )
rapid
Ts
T = 2 × Ts × L/rapid
rapid: Rapid traverse rate
Ts : Acceleration/deceleration
time constant
Td : Command deceleration
check time
θ : Acceleration/deceleration
inclination
T : Interpolation time
L : Interpolation distance
T= + Ts
L
rapid
Td = Ts + (0 to 14ms)
θ
=
tan
–1
( )
rapid
Ts
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