CAM-POST High Speed Machining Module

Implementing ICAM’s CAM-POST High Speed Machining (HSM) module significantly increases productivity from currently installed CNC machines while preserving expensive CNC controller investments.

Increases production productivity and efficiency

CNC controller retrofitting or replacement is not required

CAM-POST HSM allows NC programmers to exploit the benefits of high speed feed-rate control on machines that are not equipped with HSM without expensive CNC controller retrofitting or replacement. Users must simply input control parameters and / or overshoot tables (further details provided below) and CAM-POST HSM will automatically emulate advanced HSM functions.

Provides a competitive advantage

CAM-POST HSM utilizes the same “look-ahead” algorithms to control feed-rate that are incorporated in CNC machine controllers supporting HSM. Subsequently, CAM-POST HSM provides manufacturers with competitive advantages associated with high speed machining applications such as increased product quality, reduced production cost and shortened cycle-time.

Supports all CNC controllers

CAM-POST HSM supports controllers that offer HSM functions as well. All HSM control specifications are captured within CAM-POST QUEST HSM section. Subsequently, CAM-POST generates machine code data supporting specific HSM control functions and calculates the average tool velocity and machining time based on the information provided.

Benefit Highlights

Reduce Cycle Times: The “look-ahead” ability of CAM-POST HSM allows users to machine at higher continuous feed-rates resulting in shortened manufacturing time.

Maintains accuracy at higher feed-rates: As an added bonus, feed-rate control allows machine operators to cut parts more quickly without any accuracy loss.

Controller replacement or retrofitting is not required: CAM-POST HSM can control the feed-rate of virtually any NC machine while preserving expensive controller investments.

Compatible with all major CAD / CAM / PLM systems: CAM-POST HSM is a CAD / CAM system independent solution that can be configured for multiple CAD / CAM / PLM systems.

Features Highlights

CAM-POST HSM offers two HSM methods:

  • For users with an HSM equipped control, CAM-POST HSM will generate the appropriate machine code data to activate and deactivate HSM machining functions on the controller. In addition, CAM-POST HSM will compute the actual average tool velocity and machining time by utilizing the HSM information that was provided.
  • For users that do not have an HSM control, CAM-POST HSM will use overshoot table and / or controller parameters to emulate the functions of an HSM control. CAM-POST HSM utilizes feed-rate stepping to insure that the tool respects the programmed tolerance during contouring.

Overshoot and Undershoot Detection and Avoidance

CAM-POST HSM module calculates overshoot and undershoot by using the following four methods, all of which can be used separately or collectively:

  • Feed Control Error: Is caused by the change in velocity of each axis at a corner. To eliminate this error, CAM-POST HSM specifies the maximum change in velocity for each individual axes or group of axes.
  • Acceleration Error: Is caused by the force of momentum acting on the machine. CAM-POST HSM avoids this type of error by specifying a maximum permissible acceleration for each individual axes or groups of axes.
  • Following Error: Is caused by the lag between the estimated machine tool position calculated by the controller as compared to the actual true position. CAM-POST HSM eliminates this error by calculating the controller acceleration time constant and the loop gain time constant to ensure that the CNC machine will not undershoot.
  • Overshoot Tables: Allows users to enter overshoot error information for specific NC machines at several different feed-rates. CAM-POST HSM will use the data entered in the overshoot table to calculate the maximum feed-rate limits applicable on the machine for the entire high-speed machining process.