18. 2d machining - tcaps moodlemoodle.tcaps.net/.../content/0/artcam/artcam_18-2dmachining.pdf ·...

ArtCAM Pro 5.5 18. 2D Machining

Issue ArtCAM-P 5.5 151

18. 2D Machining

Introduction. ArtCAM 2D machining uses selected vectors to machine with a set of tools defined in a tools

database. The commands are stored in the 2D toolpaths area of the toolpaths page.

Forest Sign Example .

• Open the model forest-sign.art.

• Hold down Shift and select the inner ellipse, the squirrel, the tree and the text.

Holding down the shift key allows

you to select additional vectors. These

turn pink when selected.

These vectors are chosen to define the

area between the ellipse and the

outside of the inner shapes. If this

area is machined away it will leave

the text, tree and squirrel standing up.

• Select the Area Clearance icon.

18. 2D Machining ArtCAM Pro 5.5

152 Issue ArtCAM-P 5.5

The 2D Area Clearance page appears. Everything that

needs to be set up for the machining of the selected

vectors is on this page.

If one vector was selected then ArtCAM would machine

the inside of that vector, if the tool is small enough to get

in. If there are vectors within vectors that are selected, as

in this example then the outer vector is taken as being

machined inside and the other vectors machined on the

outside.

For a complicated model, several toolpaths are usually

generated to machine everything. A big tool is used to

clear out most of the material and a smaller tool is used

to pick out the finer areas.

• Set the Start Depth at 0, Finish Depth as 2 and Allowance as 0.25.

• Set the Final Tool Allowance as 0 and Tolerance as 0.02.

The top of the job is set at 0, so the Start Depth is 0.

To machine down 2mm into the job, a finish depth of

2mm is set. The Allowance is the amount of material

to be left on the job, until the Final Tool Allowance,

which is used with the smallest tool. The tolerance

value is how closely the tool follows the vector.

• Click on the down arrow by Safe Z.

The Safe Z part is expanded to display the tool

home position. The Safe Z is the height above any

clamps where the tool can safely move and the

home position is the position where the tool starts

and finishes.



• Set the Safe Z as 15 and the Home Position to be X -100 Y-50 Z20.

• Select Add from the Tools List.

• Select Wood or Plastic -> Roughing and 2D Finishing-> End Mill 6mm.

• Press the button Select.

The Tools List is updated with the 6mm tools. This

tool will remove most of the material, but a smaller

tool is required to get into the finer details.

• Press the Add button.

• Select Metric -> Wood or Plastic -> Roughing and 2D Finishing-> End Mill 1.5mm.

• Press Select.

The tools list now has 2 tools in it. When the toolpath

is calculated, the 6mm tool is used first. The next

toolpath calculated with the smaller tool only

removes the areas that the 6mm tool missed.

• Select a Raster strategy.

There are two types of machining strategy, Raster

which goes backwards and forwards across the job

or Offset, which goes around the vectors.

Raster strategy is suitable, as we just want to remove

the material as quickly as possible.

• Click on Calculate and then Close.

A toolpath is generated and named as Area Clearance 1.

In the 2D view a preview of the toolpath

is displayed. This is useful to check the

tool moves occur in the correct areas.

ArtCAM can simulate the toolpath as it

would be machined.



• Simulate the toolpath.

The middle part of the sign has appeared.

• Select the outer ellipse in the 2D view.

This outer edge is seen as the

outside of the side. If Area clearance

were chosen for this vector, it would

machine the inside of the vector,

destroying the sign.

A profiling pass will be used to

drive the tool around the outside of

the vector.

• Click on the Profiling icon.



A profile toolpath can be generated on the inside or

outside of a vector, to a defined depth.

How deep the tool cuts on each profiling pass is

defined by the tool's characteristics, for example if the

tool had a step down of 2mm maximum, it would take

5 profiling passes to get down to 10mm.

With a Profile pass you can have the option to

generate a tool lead in or lead out of the job. Instead

of plunging down into the first position on each

depth, the tool would go down to depth away from

the first point and travel horizontally towards it. This

is a good method if you are using a non-plunging

tool. Care must be taken when using this option to

make sure the lead in or out does not cut into the job.

The Ramping option allows the tool to move into

each depth with an angled move rather than a vertical

move. This is also a useful for non-plunging tools.

• Select an Outside Profile toolpath.

• Select a Start Depth of 0, Finish Depth of 10 and Allowance of 0.

• Click on the Select button for a Profiling Tool.

• Select the same 6mm End Mill as used before and press Select.

• Select Climb Milling.

• Click on Calculate to generate the toolpath.

The toolpath has been generated and

is displayed in the 2D view outside

the outer ellipse.




The simulation shows that this

final profiling pass down to the

depth of 10 will release the sign

from the rest of the job material.

• Close the File using File �� Close.



M-Valley example • Open the model m-valley.art

• Select the outer shape, the mountain text and the train.

• Select Area Clearance.

• Set the values as given.

These values will remove the material to a depth of

7.5mm. The Safe Z and tool home position is set at 5mm

above the top of the job.

A 12mm End Mill is chosen to remove the majority of

the material, and a 1.5mm finishes off the fine detail.

• Press Calculate.

The toolpaths appear.

• Simulate the toolpaths.



• Close the Area Clearance page.

• Select the mountain text.

• Select the V-bit bevel carving icon.

This form allows you to set the finish depth of the bevel. A

bevel can be produced with or without a side wall.

If a side wall is selected, then that will activate the Profiling

tool. This allows you to define a tool to run around the side

walls with a profiling pass.

If a wall height is left at 0, the profile tool is not available.

The carving tool has an angle, generally from 90 degrees to

150 degrees. The smaller the angle, the steeper the bevel

will be.

When the toolpath is calculated, the actual centreline of the

text is generated.

On this form there is a More Help button when pressed will

give a step to step guide.

• Select a Start Depth of 0, a Wall Height of 0 and a Finish depth of 7.5.

• On the Carving Tool press Select.

If the tool you want is not

defined it can be easily made by

selecting a similar, tool, using

Copy on the Form and then

Editing the Tool. Do not forget

to change the tool description.

If you only use a few tools, you

can delete all other tools to

enable you to rapidly select the

required tool.



• Select a 25mm V-Bit Carving tool with 120 degrees.

• Click on Calculate.

Each vector letter is calculated and is

shown in blue as this appears.

The centreline of the bevel is drawn.

You can see on the edges of the I how it

spreads out to the corners.

• Simulate the Toolpath.

The bevelled letters are shown. For the

valley lettering we will be engraving with a

V-Bit tool.

• Switch off the display toolpaths in 2D.

• Return to the 2D view and Close the page.

• Zoom into the valley area and select the Valley Text.

• Select the centre line carving icon.



The V-Bit Carving page appears and allows you to

specify the depth from where the V-bit carving is

produced.

A larger angled carving tool will produce a shallower

wider engraving.

A small angle will produce thin, deep engraving.

• Select a start depth of 7.5

• In Carving Tool Press Select.

• Select a 25mm V-Bit Carving tool with 120 degrees.

• Click on Calculate.

The toolpath is produced.


The words have bee engraved into the

sign.

For the daisy vectors, an engraving tool

will be used.




• Select the daisy vector and select the Engraving icon.

The Engraving page appears. This allows you to specify

boundary areas to machine inside. With this option you

need to specify the start and bottom depth for the

engraving.

With this option, if you have a sharp corner, you can use

the corner sharpening option to force ArtCAM 2D to

generate as sharp a corner that the tool will allow.

• Select a start depth of 7.5, a finish depth of 9.5

• Tick the box Outer Vectors as boundary.

• On the Engraving Tool press Select.

• Select the 0.13 flat conical tool from Wax section.

• Untick the option Do Corner Sharpening and Select Profile Only.

• In Roughing Tool Press Select.

• Select an End Mill 1.5mm, and enter an allowance of 0.1.

• Tick the option Offset for Engraving Tool.


The toolpaths are calculated inside each vector.



• Click on the Toolpath Manager and Simulate the Toolpath.

The daisy pattern has been engraved into the sign.

This type of approach is most useful for finely detailed

vectors.


• Select the outer vector.

• Select the profiling icon.

• Set the machining options as shown.


The profile machining

toolpath has been generated.

However, when this is

machined, the sign will be

cut out completely. This

may cause unstability so

bridges can be added.



• Select Close and select the Bridges icon.

The bridging form appears, displaying assistance. To

show the full bridging form the required profile

toolpath needs to be selected.

• Select the profile toolpath.

The Bridge options now appear. Bridges are areas where the

tool lifts up, moves along the toolpath by a certain value and

then goes down to continue cutting. This leaves small areas un-

machined that can be broken off by hand.

This page allows you to specify the number and length of

bridges. With this page open you can also directly click on area

of the toolpath to modify the bridges interactively.

• Set the Bridge length to be 10 and the Thickness to be 2.

• Under Constant number of Bridges, Enter a Number of 3.

• Select Create Bridges.



3 bridges have been created

around the profile, but not in

the best places.

• Zoom into the bridge at the top left corner.

The bridge is shown as a round tool in between two arcs. These arcs

indicate when the tool moves up and down to generate the bridge.

Bridges are also displayed in the 3D view.

• Select Window � Tile.

In this view you can see very clearly the

profile toolpaths moving around and down

the job, until the final pass where the tool

lifts up and down to generate the bridge.

If a bridge is edited the simulation view

automatically updates.

• Click on the bridge to select it.

• Drag the bridge (from it's centre) down the side of the sign.

The location of the bridge is moved along the toolpath. The

toolpath is automatically updated. The bridge can also be

lengthened automatically.

• Select one end of the bridge and drag it to increase the gap.



The bridge has been lengthened. Extra bridges can be added in by

selecting I for insert or d for delete, over the toolpath.

• Move the mouse over the other bridge at the right top corner.

• Select d to delete it

• Move the mouse to the middle of the top and select i to insert a new bridge.

The bridges are now in

place.

• Close the Bridges page.

• Select F3 on the keyboard to bring up the 3D view.

The sign has been cut out apart from the small bridges that have been left. Use the left mouse

button in this view to rotate the simulation to see the bridges.

• Rotate the view using the left mouse button.

• Save the job as training-m-valley.

Nesting Nesting is an automatic procedure, which re-arranges the selected vectors within the first

vector to use as little space as possible. This is especially useful if you have expensive

material and you need to make the maximum use of it. Offsets for the tool radius and an

offset between the toolpath are used, so there is enough room to machine out the vectors.



Space Example For this example the shapes will be cut out of expensive 'glow in the dark' material and are of

a space alien theme.

• Open the model space.

This model contains a variety of different vectors

which are scattered throughout the job. The

rectangle is the size of the material

• Select the rectangle vector.

• Hold shift and then select all of the other vectors.

• Select the Nesting icon.

This Nesting page defines, what tool will be used

and the allowance between the toolpaths, to stop

them overlapping.

To allow ArtCAM 2D to find the optimum nesting,

the angle that the vectors can be rotated by can be

set. If a step angle of 10 degrees is chosen, each

vector will be rotated by 10 degrees and then by

another 10, until the optimum nesting is found.

Mirror parts and parts in parts are alternative nesting

options, which if suitable may nest the vectors more

tightly.

There is an option to generate a single vector of the

left over material, which can be used again.



• Select a tool diameter of 6mm.

• Enter a Toolpath Clearance of 0.

• Click on Allow Part Rotation and enter 15 degrees.

• Select Create Leftover Material Vector and press Nest.

The vectors have been nested, leaving enough allowance for

the tool and the gap between the toolpaths.

A new vector is generated of the left over material and is

displayed in pink on the screen. This will be used later to fit

in some new symbols.

• Select the nested vector.

• Select the Profiling icon.

• Select Outside, a start depth of 0, a finish depth of 10.

• Select 15mm for Safez, with the home position at 0 0 17.


The preview toolpath is displayed in brown and is the same

as the left over material.




A smaller tool would be required to machine the finer

details. The vector group could be broken and only the

required vectors selected.

The vectors group is machined, but it may not be machined

in the order you required

• Close the Profile Machining Page.

• Select the profiling toolpath.

• Select the profile machine order icon.

The toolpath ordering form appears and the current ordering is displayed on the toolpath.

With the segment position set at 1 you can manually pick each sector in turn and starting

from one, renumber the segments. This can take some time if you have a lot of segments.



• Click on the toolpath inside the Alien's eyes.

The eyes will be machined

first. To verify this the

toolpath can be simulated

again.

• Click on the Reset simulation icon.


• Untick the display of the toolpath in 2D

• Return to the 2D window and close the page.

• Import the vectors shapes.dxf.

The new vectors are displayed. These vectors will be

nested within the left over material.

• Select the left over vector and then the new vectors.

• Select Nesting.

• Enter a tool diameter of 6mm, allowance of 1, part rotation of 17.

• Click on the option Allow parts in Parts and untick the option Create Leftover Material vector.

• Press Nest.



The vectors have been rearranged into the available

material. A dot has been put in the middle of the octagon

and the other two dots have moved over to the left area.

• Close the page.

• Save the model as training-nesting.

Machine along a vector. In ArtCAM there is a machine hole command, which automates the drilling of selected

vectors. ArtCAM can also machine along a vectors, so the centre of the tool moves along the

vector. This is useful for very detailed vectors where it is important to show all of the lines

and curves to define the shape.

Safari Example • Open the ARTCAM 2D model safari.art.

This model contains vectors for the giraffe shape, text and

the holes, marked by the vectors.

• Select the Giraffe and Text vectors.

• Select the Machine Along Vector icon.



The Machine Vectors page appears. This allows you

to set the finish start and depth of the machining and

the profiling tool.

• Set a finish depth of 1mm.

• Select a Ball Nose tool with a diameter of 1.5mm.



The vectors have been machined with the ball nosed

tool, giving the effect as shown. The 4 circular

vectors will now be drilled.

• Select the four circle vectors.

• Select the drilling icon.



The Drilling Page appears. This allows you to specify

the drilling tool, start and finish depth and what type

of vector you are drilling.

The centre of the selected vectors are found to

generate the toolpath.

Peck Drilling allows the tool to drill small depths at a

time and retracting upwards at each stage until the

final depth is reached. This is useful to cool the tool

so that it stays concentric and to allow the drilled

material to be removed from the hole.

• Select a Finish Depth of 10mm.

• Select a 6mm Ball nose Tool to Drill centre of Circular vectors.

• Select Peck Drilling with a retraction of 2mm.


Each circular vector has a drilling preview shown inside it.

• Simulate the drilling toolpath.



The drilled holes are displayed.

Inlays. An inlay is text or vectors with depth that is machined out of the material. The inlays are

usually machined in pairs using the same tool, so the male inlay will fit inside the female

pocket or hole inlay.

Savannah Example • Open the model savannah.art.

This model contains two groups of text.

The top group will become female inlays

and the bottom group will become male

inlays. To machine part of these groups,

they have to be ungrouped and the new

vectors grouped.

• Select the top group and select ungroup.

• Select the letters SA and make a group.

• Make 3 further groups of the next two letters in each.

• Select the group SA and the Inlay icon.



The Inlay Wizard page appears. This is the first

selection in generating an inlay and allows you to

define the type of inlay that you want.

There are four female inlay options and two male

options. The male inlay will fit inside the female inlay

if an identical vector and identical tool is chosen.

• Select Female Pocket type by clicking on the Pocket icon.

The female Pocket Inlay Page appears.

This allows you to set the settings to machine out the

inside of the selected vectors down to a defined depth,

using a roughing and finishing tool.

Although this command looks similar to Area Clearance,

it produces a different toolpath as it takes into account

how the male component will fit into this shape. For

example, internal corners on the male will have a small

radius of the tool and therefore, the female toolpath is

adjusted to allow for this extra material left on.

This option allows a profile pass while machining, which

can be done at the start, at the end or not at all. The

profiling pass takes the tool around the boundary edge of

the toolpath to remove any excess material left by the tool

stepover. For hard materials, this tends to be done first.



• Set a finish depth of 2mm.

• Select a 1.5mm Ball Nose Tool for Finishing.

• Select an End Mill 3mm Tool for Roughing.

• Select a Raster Strategy with Profiling First and press calculate.

The toolpath is produced. Looking at the inner

apex of the A, the toolpath crosses over the vector.

This ensures a perfect fit with the male inlay.

The toolpaths will be simulated at the end.

• Select Close and select the group VA.

• Select the inlay icon and the type Female Hole.

The Female Inlay Page appears.

This command allows you to define how you are

going to cut around the inside of the inlay vector. This

command will not clear out the inner material as with

the pocket option.

• Select a finish depth of 5mm.

• Select a 1.5mm Ball Nose Tool and press Calculate.



The toolpath is created as single passes through

the inside of the vector, apart from the sharp

corners where the male inlay would produce a

radius.

• Select Close and select the group NN.

• Select the inlay icon and the type Female Stepped Pocket.

The Female Stepped Pocket Inlay page appears.

This process is exactly the same as the female pocket apart from

the fact that it allows you to have a defined shoulder in your

pocket. This is defined by the depth and width of the shoulder.


• Select a Shoulder Depth of 2 and Width of 1.

• Select a 1.5mm Ball Nose Tool for Finishing.

• Select an End Mill 3mm Tool for Roughing.

• Select an Offset Strategy with Start from Inside and press calculate.



The toolpath has been calculated. Simulation at

the end will show its stepped properties.

• Select Close and select the group AH.

• Select the inlay icon and the type Female Stepped Hole.

The Female Stepped Hole Inlay page appears.

This process is exactly the same as the female hole

apart from the fact that it allows you to have a defined

shoulder in your pocket. This is defined by the depth

and width of the shoulder.



• Select a 1.5mm Ball Nose Tool and press calculate.



The toolpath is calculated.

• Close the page, select the toolpath manager tab.

• Simulate the toolpaths.

• Return to the Assistant and a 2D view. Close the page.

• Select the bottom group savannah and ungroup it.

• Make 2 new groups, Sava and nnah.

• Select the group Sava.

• Select the Inlay icon and the Male Straight type.

The Male Insert Page appears.

This command allows you to set the required text

depth. The tool used must be the same as the finishing

or main tool for the female inlay part, if you want

them to fit together.

A depth of 5 will be chosen, so if the SA are put

together, the male portion will stick out by 3mm, and

the VA will fit flush with the top.



• Select a finish depth of 5.

• Select a 1.5mm ball nosed tool and select calculate.

The toolpath is produced. Notice the

rounding around the inside of the A. The

vectors are cut out by a single pass of the

tool.

• Close the page and select the group nnah.

• Select the Inlay icon and the Male Stepped type.

The Male Stepped Insert page appears.

This is similar to the male straight allows you to have

a defined shoulder in your pocket. This is defined by

the depth and width of the shoulder.



• Select a 1.5mm Ball Nose Tool and press calculate.



ARTCAM cannot machine these vectors without destroying them, so it will not calculate the

toolpaths.

• Ungroup the vector and select the vector A.


The toolpaths of the letter A has been calculated. The other letters

cannot be generated as they are too slim in area. The tool could be

changed but the two inlays would not fit together. In this case, you

would have to make the male portion work on the letters and then

calculate a new female inlay to match.

• Press Close.

• Simulate the two male toolpaths.

18. 2d machining - tcaps moodlemoodle.tcaps.net/.../content/0/artcam/artcam_18-2dmachining.pdf ·...

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