Siemens SINUMERIK 828D Function Manual

B2: Acceleration
4.2 Functions
Basic Functions
218 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
4.2.2 Acceleration without jerk limitation (BRISK/BRISKA) (channel-/axis-specific)
4.2.2.1 General Information
General Information
In the case of acceleration without jerk limitation (jerk = infinite) the maximum value is applied for acceleration
immediately. As regards acceleration with jerk limitation, it differs in the following respects:
• Advantages
Shorter processing times with the same maximum values for velocity and acceleration.
• Disadvantages
Increased load on the machine's mechanical components and risk of inducing high-frequency and difficult-to-
control mechanical vibrations.
Acceleration profile
Figure 4-1 Velocity and acceleration schematic for stepped acceleration profile
a
max
: Maximum acceleration value
v
max
: Maximum velocity value
t: Time
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Siemens SINUMERIK 828D Specifications

General

Control Type	CNC
Operating System	Windows Embedded
Processor	Intel Atom
Display	10.4" color TFT display
Interfaces	Ethernet, USB
Programming	ShopMill, ShopTurn
Operation Panel Size	10.4"
Protection Class	IP65
PLC Memory	2 MB
Spindle Capacity	4 spindles
Hard Drive	CompactFlash