For position feedback, other CNC dressers often employ rotary encoders. In such a setup, the servomotor shaft position is reported by the encoder, and this plus the pitch of the motion screw is used to calculate slide position. Even with a precision ballscrew, there is error between this calculated position and the actual slide position -- especially during direction changes -- due to backlash, friction, compliance, etc. As the mechanics wear, the position error gets progressively worse. Dressing a circular contour with only rotary feedback is a nightmare, since doing so requires coordinated motion with multiple direction changes. The DM-9CNC uses linear encoders attached directly to the slide, ensuring accurate positioning under all conditions so the resulting contour is always true to form.
The DM-9CNC is built on a granite bed for optimal thermal stability and vibration control. The ability to dress wheels offline increases efficiency and minimizes downtime. Having wheels ready for change-over allows the grinder to be used only for its intended purpose -- making parts. Wheel contour can be generated in CAD or entered directly as linear and circular positions on the large 15" touchscreen interface. Dresser path, wheel shape, and dresser position are all rendered in real time on the screen.
The two servo-driven slides feature 0.1 µm glass scale feedback for accurate positioning. Hard-chromed dovetail ways with Turcite gibs deliver ultra smooth motion and long life. The roll dress spindle on the DM-9CNC is extremely rigid and precise, with runout less than 0.00005" (1.3 µm).The DM-9CNC uses linear encoders attached directly to the slide, ensuring accurate positioning under all conditions so the resulting contour is always true to form.
The DM-9CNC with its advanced control allows for seamless integration with CAD/CAM software packages.
30 gallon capacity with two removable settling tanks centrifugal pump & filtration package
Glebar prides itself on selling precision grinding machine system solutions, tailored to your specific needs. Below is a small subset of applications, performed on this machine, that Glebar has provided solutions for over the years.
The DM-9CNC Wheel Dressing Machine allows a grinding wheel to be contour dressed offline using a fully programmable single diamond or rotary diamond roll. Having the ability to dress wheels offline allows the wheels to be ready for production, reducing setup time and improving machine efficiency.
The wheel is dressed on the grinding machine during setup or using a manually held contour dresser. Contour dressers require a skilled operator who moves a stylus along a metal template of the ball form as a single point diamond removes material from the wheel.
Dressing the wheel on the grinder reduces OEE and increases setup time, delaying production. Manual Template Tracing is operator dependent and inconsistent, which affects the quality of the grind, increases scrap rates, and requires more frequent dressing which shortens the life of the wheel. Deliver a process to dress the work wheel for a 1" diameter ball. The process has to improve OEE, reduce setup time, and improve consistency.
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