Alexsys V4 Turn Operator Manual

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Overview

 ALEXSYS is a programming system for CNC machining centers. That combines features of CAD / CAM systems with typical features of conversational programming.

It is not necessary to be experienced with CAD/CAM systems to use this software.

The lathe module support all the most common turning operations.

• Face Turning
• External / Internal Turning
• External / Internal / Face Grooving
• Central Drilling
• External / Internal Threading , also tapered threads
• Cut-Off

Face Turning

Diameter Mode - Auto : Start and end diameter value are defined by stock dimension

Diameter Mode - Manual Values : Start and end diameter value are defined manually

Start Z : Reference Z , usually it's always 0

Corner Mode : Choose between chamfer or fillet

Init Chamfer : It the chamfer/fillet value.

Child operations:

1) Roughing Operation

Material to remove : Is the material width to remove , measure from Start Z to Z+ direction

Finishing allowance : Is the material width left to finishing operation by the roughing operation

2) Finishing Operation

No options for this operation.

Generic Turning

External Cycle : The tool moves from the outside the inner part of the component.

Internal cycle : The tool moves from the inner part of the component to outside.

Before proceed with internal cycle is necessary create a central hole in the component.

In important also use a tool with dimension compatible with this hole diameter.

You can find this information in tool catalog.

To add this operation, from [MENU] -> Lathe  -> External or Internal Turning , depending on your needs.

See related article on how to associate geometry to an operation, and also page about [Step Profile] and [Coordinate] pattern. They are useful with generic turning operation.

Here the screen related to external / internal turning machining.

Geometry Selection

Generic turning accept as geometry both open profiles and closed profiles.

It's suggested to link just a single profile in geometry list.

Open Profile:

Closed Profile:

Turning Parameters 

Turning direction - Traditional : Tool direction it's from Z+ to Z-

Turning direction - Reverse : Tool direction it's from Z- to Z+ , you need to select a compatible tool when you change this property.

Profile Start/End Extension : A tangent extension will be added to start/end of selected geometries

Apply Fillet on sharp corner : Where applicable, a fillet will be created in sharp corner.

Toolpath Limit : With this you can define the limits of working area.

Without Limit :

With Limit :

Operation 1 of 2 : Roughing 

Finish Allowance X / Z : It's the material thickness left by the roughing tool for the finishing operation.

Roughing Macro : Where applicable , it will print G71 macro code in output code instead of simple movements

Finish with same tool : Finishing allowance material will be removed by the roughing tool

Operation 2 of 2 : Finishing

Reverse direction on vertical wall : When enable , the turning direction will be inverted in 90° profile element. In some context , this may reduce tool vibration.

Vertical wall threshold : Will be considered only elements with length bigger than this value.

Multiple finishing passes : It create multiple finishing passes. The distance between passes is determined by finishing allowance thickness.

example : If you have a 0.3mm of finish allowance and 3 finish passes. Toolpath will generate 3 passes with a 0.1mm distance between them.

Lathe Central Drilling

To add a drilling machining , from Menu -> Lathe -> Central Drilling

This is the machining property screen.

Here you can enable these sub-operations :

1. Center Drill
2. Drill
3. Chamfer
4. Tap
5. Reamer

You can change the sub operation order manually from treeview. See related link at the bottom of this article.

Safe Z : It's the Z Level of approach . The tool arrives at this level in rapid.

Start Z : This is the effective start working level. Usually it's 0

[Drill Operation] Add Drill Tip Length : It calculate the drill tool tip length and add it to inserted depth. 

The drill tip length is calculated by tool diameter and tool angle. You can edit this properties from tool edit screen. See related link below.

[Chamfer] Define Chamfer Diameter : In chamfer operation is possible define the plain tool depth to execute or desired chamfer outer diameter. 

If you select to define the outer chamfer diameter, the effective tool depth will calculated automatically based on selected chamfer tool geometry.

Lathe Threading

To add an threading machining operation , from MENU -> LATHE -> select EXTERNAL or INTERNAL Threading.

In the screen below you can see requested parameter.

You can pick thread default data by selecting a thread category and then selecting desired thread row from the drop down property.

After selecting desired thread, all related field are filled with default data from thread table.

To open thread table window , you can click on button indicated in following image, or from MENU->EDIT-> THREAD TABLE

See related article below on THREAD TABLE to get more information .

Lathe cut-off operation

When is necessary cut away turned part from bar, you need the Cut operation . 

From main menu -> Lathe -> Cut

Pick Point : Let you select outer diameter and Length with mouse cursor.

Outer Diameter : It's the start diameter of cut cycle

End Diameter : It's the end diameter of cut cycle. This diameter is compensated with tool nose radius in gcode.

Length: It's the desired length of part.

Chamfer : You can create a chamfer or fillet in cut corner.

Chip Breaking Movement : When enabled, it create a chip breaking movement instead of a plain work movement to cut the part. This help to create smaller chip.

Basic Lathe Tutorial - Bullet Shape

Here the sample dxf for this tutorial. 

2 - Import Cad Geometries

It a good practice clean the dxf files and leave only the profiles you want to import.

You can remove all unnecessary entities from Alexsys, but to keep thing easy , it's suggested do this cleaning process directly with the cad software.

To import the dxf file, from Menu -> File -> Open , select the dxf file with the file selection dialog.

After cad import, Alexsys screen will be like this :

The tool screen "Adjust Imported Geometry" is called automatically.

This screen contains all the common modifier usually applied to imported geometry. Like rotate , scale , mirror and so on. Please take a look at this tool related documentation page here .

We need to create a turned part, so the profile must lie in the XZ plane. Under the CHANGE PLANE section, click on Move to XZ Plane.

The current geometry is very much not centered with the coordinate origin, So maybe after calling change plane,  the geometry will be off screen.  Just recall the 2D view to zoom to fit the scene.

You can also see the label in top of 3D viewpoint now indicate PLANE XZ

If you move the cursor around the 3D viewpoint, you can see huge coordinate values.

The geometries are in a not well precised position in 2D space. 

We need to move it to X0 Z0 position. To do so , scroll down the side screen and click on PICK ORIGIN.

After that, click on the indicated point in the image below.

Again if the geometry get off screen , click the 2D button view.

You can see the 3D coordinate icon centered with the profile. This means the geometry is now in a correct position.

Click [OK] twice on side screen to proceed and return to the home view.

3 - Add First Setup

Now add the lathe setup item.

From Menu -> Lathe -> New Setup - Lathe 2 Axis

For this tutorial, edit these properties :

Program Name : Bullet shape

Spindle Rev. Limit : 400

Press [OK] to proceed.

4 - Stock Definition

Now you need to define the stock material dimension.

Set these properties :

Outer Diameter : 120mm

Lenght : 185mm

Click [OK] to proceed.

5 - External Turning

From Menu -> Lathe -> External Turning -> Select Existing Geometry

Be sure you have CHAIN SELECTION active in main menu and click on imported geometry .

Now you have a screen like this.

In the "Geometry Selected" list , you should see : Picked Entities (5) (Geometry)

The (5) mean you have selected 5 different entities and ecam grouped into a single selection since they are consecutives elements.

In this tutorial we don't even check the cut data parameter or turning parameter in general.

You can take a look at this other tutorial and at related page for external turning for more details.

6 - Simulation and G-Code Generation

Here the detailed simulation documentation page.

Here the detailed g-code generation documentation page.

From main menu, click [Simulation] to play the toolpath animation, with this you can understand better how the generated toolpath.

And to generate g-code press [Generate Code] from main menu, a dialog will show asking destination folder. Press [GCODE] and a text editor will appear with gcode.

Here you can download project file for this tutorial

Appendix

Tool Nose Radius Compensation

In ecam you don't have to bother about tool nose radius compensation.

Just set correct nose radius value and tool orientation in tool geometry dialog.

The toolpath is automatically compensated .

In below images you can see in blue ( and green ) the path the tool will follow, in order to create the programmed profile.

Reference

To better understand tool nose radius compensation on lathe you can search on google.

Or read here some good documentation :

http://cncprograming.blogspot.it/2011/07/tool-nose-radius-compensation-g40-g41.html

https://www.youtube.com/watch?v=kStjQkQPP6Q

http://www.webmachinist.net/toolradiuscomp.html

Import 2D CAD File DXF/DWG

With Alexsys you can import 2D geometries from DXF / DWG files.

1. First select the plane you want to import the geometries you can select the XY or the XZ planes.

   The XZ is the lathe plane.

   

2. From menu [FILE] -> [OPEN FILE]

   Choose the file you want to import.

   How to generate G-Code

   To Generate G-Code , press this button from main Menu or press F8 from keyboard.

   

3. This window dialog is the next step , here you can define gcode output filepath.

   Press G-Code or keyboard [ENTER] to generate GCode.

   After generation the generated machine code will be opened into select text editor.

   

   ---

   If may receive this error message : 

   

   This means that some operations toolpath are not valid.

   Look at tree view you have some operation with error icon.

   

   Hover with mouse cursor the error icon to read message error.
   You need to solve all the issue before call g-code generation.

Cad Editor

Alexsys is not indented to be a full CAD system, but with the available tools is possible draw basic profiles or do some little edits to imported geometries.

Under Menu -> Draw  , are available all the command below. See also the related links to get more information.

Toolpath Simulation

Is possible get the simulation of generated toolpath with the command "Simulation"

From Menu -> Simulation , or press F6 from keyboard.

Here the simulation side screen.

With simulation control you can single-step forward or backward.

Pause and continue simulation

With this control you can increment simulation speed. Drag the cursor with mouse

This slider stand for the current operation timeline, you can drag the cursor forward or backward.

Tool Mode : is possible show the tool with transparency or hide it completely

Continue with next operation : If checked, at the end of an operation simulation, the next operation is played. Otherwise the animation is stopped. Use the 2 button to go to next or previous operation manually.

Show complete toolpath : If checked, all the movements of current operation are shown .By default , just a the last part of the toolpath is visualized . The length of this visualized toolpath is determined by the property "Toolpath length".

Stock Simulation : If checked, the material removal simulation is shown. This option might impact on performance.

Stop on Collision : When a rapid collision is detected, the animation is paused on collision event. This option , is enabled only when the stock simulation is active.

Information : Current tool position and cut data parameter are visible in the lower part of the screen.

Basic Concepts

{EMPTY_LINE}
{LINE_N}
({OP_DESC})
{RADIUS_COMP_INFO}
({TOOL_LABEL})
T{TOOL_POS}M6
{NEXT_TOOL_POS}
{FEED_MODE}
S{SPEED_VALUE}{SPINDLE_ORIENTATION}
{ORIGIN}
{COOLANT_CODE}

LINE_N = N5
TOOL_POS = 15
NEXT_TOOL_POS = 10
FEED_MODE = G98
SPEED_VALUE = 2387
SPEED_ORIENTATION = M3
ORIGIN = G54
COOLANT_CODE= M8

N5
(CONTOUR - ROUGHING)
(COMP COMPUTER - RADIUS COR VALUE 10)
(R390 D 20MM)
T15M6
T10
G98
S2387M3
G54
M8
...

3D Stock Model

In Alexsys the 3D stock is modeled with defined machining operations.

From preference dialog you can choose how the model is created . From Menu -> Edit -> Preferences -> 3D Model Creation Mode

1 ) By Toolpath

The generated 3D model, is the effective result of the toolpath movements.

In this way you can see if there something wrong with generated toolpath.

For example, in the case below you can see the material left in the corner from the end mill machining. This is what you get on real machining.

[Simulation Stock Quality] is related to the stock in simulation context.

[Static Stock Quality] is related to the stock modeled in viewpoint context.

2 ) By Work Properties

This generation mode is usually faster , especially for simple 3D model, but it doesn't reflect the effective toolpath.

Some work machining like threading and engraving are not elaborated .

In the example below you can see the model is not considered the corner radius of the pocket. It's just used the profile and work parameter to model the stock.

Textbox integrated calculator

Every numeric textbox has an integrated expression solver.

This mean you can insert expression like " ( 6+6 ) * 2 ", and when you leave the textbox field, in the text box will convert it to 24 as result.

Unit Conversion

Is also possible unit conversion , from [mm] to [inch] and from [inch] o [mm] units.

Just insert [mm] or [in] suffix at te end of inserted value.

Example:

In a [mm] unit file instance, set as text " 1 in " or 1 inch in any numeric textbox .

The value will be converted in 25.4 mm .

Timeline

In the window application bottom , is visible the timeline control.

1) It's the time of current selected operations.

If you hover this label, you can see the timing grouped by setup, if you have multiple setup in your project.

2) Here it's a graphical representation of machining time of each operation.

The purpose of this graphic is too see at glance what operations are taking most of the machining time.

Every operation has a different color, if you hover it with mouse cursor you can see the related operation in the viewpoint.

Click on color bar to select related operation.

Manual Code

With [Manual Code] operation , is possible add manual text in output g-code program.

Load Template : Load existing gcode.

Description : It's the name of current template . It's used as identifier when you need to save , load or delete a template.

Insertion Mode :: Write only g-code : In output gcode related to this operation, you get the imputed text without any other command.

Insertion Mode :: Call Tool + Manual Code : In output g-code related to this operation , you get also the tool change and tool disengagement logic.

Save Template : Save the current text as template. You can find it in template list after this.

Delete Template : It will delete the related template from list.

G-Code Text : It's the manual g.code text you are going to add in output code.