Requirements - Siemens SINUMERIK 840D Operation/Programming Manual

7
Mold Making

7.1 Requirements

7.1

Requirements

Program structure and
storage
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This chapter only describes special aspects of mold making with
ShopMill. A detailed description of the ShopMill functions is given in
the previous chapters.
ShopMill can process not only sequential control programs but also G
code mold-making programs. The precondition for this is optimization
of the drives.
Please refer to the machine manufacturer's instructions.
Depending on the machine type, 3-axis mold making applications and
also dynamic 5-axis machining operations can be performed.
You can also use the functions integrated into ShopMill to set up the
machine, such as determining the zero of the workpiece or measuring
tools for mold making programs.
To achieve optimum velocity control for your mold-making programs,
you should split the mold-making program into a central technology
program and a separate geometry program rather than creating a
single complete program.
•
Technology program
The technology program contains basic settings such as work
offset, tool call-up, feed values, spindle speed, and control
commands for velocity control. The technology program also calls
the geometry programs as subroutines.
You can create the technology program in ShopMill's G code
editor.
•
Geometry program
The geometry programs of each type of operation (roughing,
rough-finishing, and finishing) contain only the geometry values of
the free-form surface to be machined.
The geometry programs are created on an external CAM system
in the form of G01 blocks.
Depending on the application, the size of geometry programs
ranges from 500 KB to 100 MB. Programs of this size can no
longer be processed directly in the NC RAM. This means that the
geometry programs must be saved either on the hard drive of the
PCU 50 or on a Compact Flash card in the PCU 20.
Storage on a network drive is only recommended if there is a
point-to-point connection between the control and the server
because only then is uninterrupted data transmission ensured.
Storage on hard disk or compact flash card are preferable.
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
7
10.04
 Siemens AG, 2004. All rights reserved