Anaheim DPJ72LC4, DPJ72LC3 Feedrate and Ramping Settings, To Set the Maximum Unramped Feedrates

Page 32

28

Section 3 Initial Setup

Feedrate and Ramping Settings

Every machine tool will vary as to how fast it can move each axis without losing steps. Losing steps means that even though the stepper motor gets the signal to move a step, it isn’t able to move the step, and accuracy is lost. The usual cause is insufficient drive torque at a given motor RPM. Since most stepper motors are “open loop” systems, there is no way of telling when a step is lost without physically measuring the movement of the axis and comparing that to the amount it should have moved. However, when not “over torqued”, a stepper motor is very reliable and accurate. For that reason, we highly recommend finding the maximum rates at which steps are not lost, both with and without ramping, and then limiting the maximum rates for each axis to about 70% of those values. Due to variations in the drive mechanism for each axis, make sure you do the following tests in all directions, and at several positions along each axis.

4To Set the Maximum Unramped Feedrates

1.Choose Feedrate/Ramping from the Setup Menu. The Feedrate/Ramping setup dialog box will appear.

2.Enter 99 for the X axis Max Unramped Feedrate, and 100 for the Maximum Feedrate, then choose OK.

3.Choose the Point button on the Control Box. Select Any Point from the Name pull-down menu and Incremental from the Coord pull-down menu. Enter 1.0 in the X text box and enter a relatively slow feedrate (such as 5). Make sure you have room to move the X axis 1 inch, then choose Start.

4.If the motor slips, repeat this process with a slower feedrate. If the motor doesn’t slip, try a faster feedrate. Repeat this process until you find the highest feedrate that doesn’t cause motor slippage.

5.Now run the entire length of the axis in both directions to make sure there is no slippage at any point on the entire axis.

6.Choose Feedrate/Ramping from the Setup Menu.

Image 32
Contents User’s Guide Table of Contents Error! Bookmark not defined Page System Requirements Thank YouProduct Support Installing LC Using the MouseIf you are using Windows 3.1 or If you are using Windows 95, 98 or NTChoosing Commands Using Standard Windows ControlsText Boxes Command ButtonsPull-Down Menus System Safety About this Manual Program OverviewPull Down Menu Bar File MenuMain Screen Features Controller Menu Main Screen Features To change the state of an output line Help Menu Tool Position BoxView Menu Other Features ProgramMachine RelativeTo set new values within a coordinate system To zero each axisTool Path View Port To zero all axesControl Box Code Mode Jog Mode Point Mode Home Mode Message Box Program Listing BoxPage Windows Setup WindowsSystem Settings To set your system settings Software SetupSetup File Initial Setup Machine Tool Settings To set the Machine Tool Settings Initial Setup Feedrate and Ramping Settings To Set the Maximum Unramped FeedratesTo Set the Maximum Feedrates To Set the Ramping RateTo Set the Direction Change Delay To Set the Maximum Arc Feedrate Setting Machine ZeroTo Set the Jog Rates To Set Machine Zero Using Home Switches To Set Machine Zero Without Using Home SwitchesSetting Backlash To Set BacklashTooling Settings To Set Up the Tool LibraryInput Line Settings To Configure the Input LinesTo define an M-code to control output lines Output Line SettingsTo Configure the Output Lines Motor Signal Settings To Configure the Motor Signal LinesTo Configure G and M Code Handling Initial Setup Page Opening a G-Code Program Importing a DXF FileTo open an existing program To import a DXF fileTo choose a different file name or folder System Programming To edit a new program Using the Program EditorTo open the editor To save your program using the same file name To close the editorM Codes Supported Key Programming ConceptsMode Absolute vs. IncrementalM Code Reference G00 Rapid Tool PositioningG01 Linear Interpolated Cutting Move G02 Clockwise Circular Cutting MoveEnd G03 Counter Clockwise Circular Cutting Move End Center StartG04 Dwell G17, G18, G19 Arc Plane SelectionG20, G21 Inch Units and Metric Units G28 Return to Reference PointG29 Return from Reference Point System Programming System Programming System Programming System Programming G52 Local Coordinate System G90 Absolute Positioning Mode G91 Incremental Positioning ModeM30 End of Program M98, M99, M02 Subroutine CommandsM00 Program Pause Program Comments Feedrate CommandMXX Miscellaneous Device Control System Programming Configuring LC Starting LC SoftwareWindows 3.1 or Windows 95, 98 or NTLoading a G-Code File Viewing the Tool Path Tutorial Animating the G-Code File Editing a G-Code File Connecting the Machine Online Using the Jog ControlsSetting Machine Zero Using the Point Move Setting Program Zero on the Machine Tool Testing the Program on the Machine Tool Turning off the Controller Cutting the PartExiting the Program O Connections Typical Output Configuration Driver BLD72 Series Driver Motor ON/OFF Input Internally ConnectedSetting the Kick Current Driver Page Glossary Glossary Glossary