For other servo and stepper motors, the max velocity will be controlled by the motor performance curve, driven voltage, mass and condition of the machine slides. Max velocity is not required to 15 decimals as it is usually programmed using 0-2 decimals. 5600000/5647.0588 = 992 mm per minute Discount this value by about 10% for a safe margin = 890 mm per minute Calculate the maximum velocity in Steps per second by (Max speed in mm/min * Steps per mm) /60 sec per minute 890mm/min * 5647 = 5025830 steps per minute 5025830/60 = 83763 steps per second Note that the inch and metric values are nearly the same, the differences are caused by rounding. Use the ratio of steps per mm to calculate the max velocity.
Divide the maximum steps per minute by the steps per inch to calculate the maximum velocity: 5600000/112914 = 49.6 inches per minute Discount this value by about 10% for a safe margin = 45 inches per minute Calculate the maximum velocity in Steps per second by (Max speed in ipm * Steps per inch) /60 sec per minute 45ipm * 112914 = 5081130 steps per minute 5081130/60 = 84685 steps per second For a metric screw with 1mm pitch and 5647.0588 steps per mm: The maximum steps per minute is the same as for an inch screw. The maximum servo motor speed is 2800 rpm. In the case of a Sherline mill with DeskCNC servos and Globe motors with 2.8:1 belt reduction the axis ratio is 112914. Use the axis ratio from 1) above, and calculate the expected maximum velocity or speed at which the axis will travel. The maximum velocity is used to limit individual axis speed, and is also an input to the acceleration curve. The following table shows common stepper ratios: Inch Steppers can also be driven at different step ratios. Stepper motors are usually 200 steps per rev, and sometimes 400. Common lead screw ratio calculations: Inch Lead Screw 20 10 5 The precise ratio is 2.8235294 and calculates to 5647.0588 steps per rev. If the motor is mounted on a 10 pitch lead screw, then the linear motion ratio is 10 * 5600 or 56,000 steps per inch. The 2.8:1 ratio calculates to around 2.8 * 2000 = 5600 counts per rev of the output shaft. With quadrature, the motor produces 2000 counts per revolution.
#DESKCNC SOFTWARE DOWNLOAD DRIVERS#
In the case of the IMService servo drivers with Globe motors, the belt reduction is setup so that one revolution of the output shaft is about 2.8 revolutions of the motor shaft. The Axis ratios are used in the DeskCNC machine setup. 1) Determine the steps to linear motion ratios for each axis. If the setup steps are followed in sequence, the machine setup dialog can be opened once and the changes all saved at one time, rather than after modifying each tab of the machine setup dialogs. Throughout this manual, each page is written to be a standalone operation. 3 3) Setting up the software – Machine Tab 4 4) Setting up the software – DeskCNC Setup Tab 5 5) Setting up the software – Axis Setup TabĦ) Setting up the software – Machine Velocities Tab 1) Determine the steps to linear motion ratios for each axis.Ģ) Determine Maximum velocity (speed).
0 kommentar(er)
