CNC Spindle Retraction for Safe Magazine Rotation Correction
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Solution Overview
Problem
In machine tools with turret-type magazines, rotation deviations can cause interference between the magazine and the main shaft or tools during rotation correction, leading to potential damage.
Innovation Solution
A numerical value control device that includes a rotation drive unit, storage unit, coordinate detection, deviation determination, position detection, and correction request units to retract the main shaft from the magazine rotation region, preventing interference and enabling safe rotation correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rotation correction is performed when the main shaft is close to the magazine, then the magazine can be returned to the reference position, but interference between the magazine or tool and the main shaft or attached tool occurs during rotation
Solution Approach 1:
The control device determines whether the main shaft is within the magazine rotation region before executing rotation correction. If the main shaft is within the rotation region, the device first retracts the main shaft to a position outside the rotation region, then performs rotation correction. This preliminary retraction action prevents interference between the magazine and main shaft during rotation correction.
2Object-affected harmful factors
If the main shaft is retracted from the magazine rotation region before rotation correction, then interference is avoided, but the correction process becomes more complex
Solution Approach 1:
The control device uses position detection means to continuously monitor the position of the main shaft relative to the magazine rotation region. Based on this feedback information, the control device automatically determines whether retraction is needed and executes the appropriate sequence of operations. This feedback-based control simplifies the overall process by eliminating the need for manual intervention or complex external coordination.
Data Source
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AI summary
Provided are a numerical value control device, a numerical value control system, a control method, and a program, with which a primary shaft can be retracted to an appropriate position when executing magazine rotation correction. In a state in which a primary shaft is stopped at a point M4 on a tool exchange path 52, a CPU determines whether there is a rotation deviation in the magazine in order to restore the position of the primary shaft in a machining region. If it is determined that there is a rotation deviation, the CPU detects a Z axis of the primary shaft, and determines whether the detected position of the Z axis is at a Z axis ATC origin point. If the detected position is not at the Z axis ATC origin point, there is a possibility that the primary shaft is positioned within a magazine rotation region. In this case, the CPU retracts the primary shaft to the Z axis ATC origin point, and requests an operation or task for executing rotation correction to return the magazine to a reference position. Once the rotation correction has been performed, the CPU moves the primary shaft toward the machining region along a tool exchange path 52, 51.