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发表于 2008-12-11 14:57:42
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来自: 中国江西鹰潭
Z Height List Model
, N" ?3 H5 I3 J2 aThe list of Z heights represents the heights at which the Triangles Model will be sliced. The commands available are:-
/ a7 K Y; z# ?& V% H- Q& j x/ PEdit 9 a# H/ E9 r, ]6 y8 }4 ~
Modify the Z heights in the list by either:-
" ?& u, Y9 a V1 h/ QAn absolute value in Z.
$ A9 \+ f2 k% l7 t! n) G' |2 \! PA number of Z heights divided evenly down the block.
/ `) B8 k9 R; j* P6 mA stepdown distance. 2 B3 X4 f. [! E
An intermediate number of Z heights between existing Z heights in the list. ) _9 o8 ~( I, \
The command to change the generation mode is:- ' u2 i. X1 n% j, ?$ G8 m# ?: K
||--EDIT--|--ZHEIGHT--|--MODE--|--VALUE---------||5 b3 A3 h5 b1 |: V/ j3 Y
| ||
, L* v/ i0 o% E' v" u |--NUMBER--------||
' d" [1 r5 U3 H1 ]) d; C! d; V | ||1 ]& v* s' [0 K
|--STEPDOWN------||
/ n) A3 M5 c$ {) ^: e) |6 S | ||+ O- n3 ?& [& U1 `& X0 ?7 `
|--INTERMEDIATE--||3 u8 o% r5 c1 E X7 Q( ?
The command to change the value applied to the generation mode is:- % G9 ^& f( d2 t
||--EDIT--|--ZHEIGHT--|--MODEVALUE--|--value--|| t0 W1 G2 Q7 Y
The command to finally generate the z heights is:-
" U/ v# b3 y" V ||--PROCESS--|--ZHEIGHTS--||+ k- M) h: P# g. b6 j$ ~6 x
Note that no existing Z height will be deleted from the list as a result of this edit command. Note also that the flag CSTEPDOWN, when SET, forces the distance between step downs to be constant thus avoiding the lowest Z height taking a cut smaller than the rest. 6 ]! g1 B/ V/ g/ K: Q! y
The Z height list can also be edited by appending and deleting Z heights held by a named toolpath, pattern, or featureset entity:-
4 E' i7 {7 o+ _ ||--EDIT--|--ZHEIGHT--|--entity-type--|--name--|--APPEND--|--|--BOTTOM--||; Z" y3 \( k6 g+ W2 r( a
| | | ||% [9 k: O" M1 e, w! k) v( B& w
|--DELETE--| |--TOP-----||
/ v" |6 M" o" I9 e; q | ||( a2 r/ \7 D/ z: w
|--ALL-----||
) t2 R' h( v7 |6 N9 \! VDraw 3 f$ x+ L- T6 V1 D
Draw the Z heights on the block. Note that these are drawn relevant to the active Workplane. If the Workplane is deactivated then they are is automatically re drawn relevant to the World co-ordinates.
- Y3 J+ G3 t+ I; A$ f ||--DRAW--|--ZHEIGHTS--||9 s( S# P8 B0 F- B# d
Undraw
9 ? _' H. k( C- y( k ||--UNDRAW--|--ZHEIGHTS--||
( v ?; K- z! L; k$ d5 KDelete
* u9 s# {( l \6 E# |Delete all Z heights, pick as many as required or delete at a known value. Note that deleting a Z height has the implication of deleting any Slice and Cutter Paths at the same height.
6 X0 v2 {' K+ @+ X% V ||--DELETE--|--ZHEIGHTS--|--ALL-------||5 Q# `& X: ^! Z) |( h
| ||* Q' y6 h* m, {1 N
|--pick------||; F& u) K6 x* X. x
| ||
9 H& P' q: U+ x2 @) t* ]) X |--z height--||" h4 l K" z! i6 i; u
Size
* m5 `! S: r0 T) R; X: h2 e! ~+ F {Print the height of one or more picked Z heights. 6 i( R# ]8 {3 z# x" Q6 J! R% R7 }; x
||--SIZE--|--ZHEIGHTS--|--pick--||
' N, G4 g/ P( d
' V5 c' d- r0 Z6 m4 ?--------------------------------------------------------------------------------0 q6 D* d! k6 k8 F. }/ J2 m* i
Slices Model
! Y8 S2 ?; }2 HThe Slices Model contains the Slices created as a result of slicing the Triangles Model bounded by the Block Model at the Z Heights in the Z Heights List with the Tool Model. Note that the slices are stored in Absolute World co-ordinates and are therefore not affected by any changes in the Workplane.
; _! d8 X6 A# B8 I/ ]Draw
+ J5 O% J4 L) W% j# m ||--DRAW--|--SLICES--||- @; _, D- \4 F% b
Undraw
& U8 g2 K6 m8 j; z+ V+ I1 v ||--UNDRAW--|--SLICES--||
* o' h8 z6 _8 h/ ]5 d& pDraw Pixels
2 z# @! b- J' d" nOnly available if the Slices are drawn. ) ?! g7 I+ t9 `7 N& M* ~
||--DRAWPIX--|--SLICES--||4 e9 }5 H3 L. g+ [4 o& @7 x
Undraw Pixels
& a. u* d- o1 B& ?Only available if the Slices are drawn.
g$ s$ o7 ?- b r7 \) i ||--UNDRAWPIX--|--SLICES--||# E; @" [; ^3 M, t6 i8 ?$ m
Animate Redraw slices one span at a time with a time delay between each drawn span. Only available if the slices are drawn:- # a* ^9 j0 F+ _- ~: L2 p1 ]
||--ANIMATE--|--SLICES--|--time delay--||
* x1 L' k, ?6 U9 ~7 O1 T) ]Get
9 a6 b" a; h5 A' c5 |Read slices from a DUCT Picture file
/ s; t2 G; Z& ]3 f V* J. \ ||--GET--|--SLICES--|--filename--||! [' Z5 l6 Y" O% H' j/ \
Note that this command will delete the existing triangle model, roughing toolpaths, slices and Z heights. It will then automatically create a block around the slice limits
2 l4 x) d# \" |/ g1 n( ^! ^Load $ @5 ~$ r' |/ c# x1 r& V. f
Load slices from a committed roughing toolpath
$ O) Y X$ _2 G ||--EDIT--|--AREACLEAR--|--SLICES--|--LOAD--||
$ s% F0 H2 h+ h5 g7 Y* X( i% vUsers need to be aware that its currently possible to load a set of slices that may not have been created with the current model. Subsequently, this is currently a PREVIEW function and should be used with care. # I6 r" c' G5 F' ] s( Q! y
Delete ' D+ }4 s! E3 D& ~4 l3 d- i6 w
You can delete the slice model via either levels, pockets or areas. When deleting levels you can pick as many as required or specify only one. When deleting pockets you pick the top contour of the pocket you require and PowerMILL will determine which contours below it constitute a pocket. When deleting areas you pick any contour within an area and PowerMILL determines which other contours belong to the area. ( U% ^- ~1 S* x/ a
Note that deleting areas may destroy the pocket information held with the slice model. This means that pocket deletion and machinining may be unavailable + @1 s/ S4 k9 M$ ^, R- R( a) Z- Y
It is possible to undo the level, pocket and area deletion. This means that each can be deleted (or effectivly masked) and then restored with the undo command. Note that the undo commands have the effect of restoring ALL slice data that has been deleted via either the pocket or area deletion commands. 7 {+ X1 u" O' r# t6 q) y
||--DELETE--|--SLICES--|--ALL-------------------------------||
0 Z1 S, B! @) }8 C1 k | ||. v2 v9 u' b6 \% o8 A3 Q1 M) X) {) S
|--BYVALUE--|--z height--------------||( ?1 e% h5 R/ I) c* n
| ||
[3 Z, [$ |/ b' A8 G, Z& D' {& ~ |--BYPICK--|--POCKETS--|--pick item--||/ W& M2 o: P9 i" C+ ?5 s
| | ||
3 b/ F. \ Y0 f) E7 l |--LEVELS---| ||
0 l* ~! V# m' U: k | | || S7 H$ g' f( K3 m" V* ^
|--AREAS----| || H" o7 I8 x. `" s+ t# n
| ||
1 d! K- Y" R8 @3 G$ g# P& E |--UNDO-------------------||$ }8 ^! f7 g& g0 |+ T6 }
Note that deleting slices or pockets has the implication of deleting any Cutter Paths associated with them. Note also that the undo command only restores the pocket and not the Cutter Paths.
5 h2 i1 K# [; x+ K; _1 R( SSee also Area Filtering. 2 A0 P' W2 _! Z6 H9 v
Flags & Parameters
/ u S7 ^+ g, i D7 J& BThe following flags and parameters are taken into consideration during slice generation:- ( R( s1 P- S; f4 P ?
RTHICKNESS" e6 U/ G/ H+ P3 n" s% E
Specifies how much material is to be left on the Triangle Model after slicing.
$ @+ x6 {0 b/ n e* \! hRTOLERANCE& U; M5 @% I: {0 e
Specifies the +/- accuracy of the thickness allowance i.e. with a thickness of 1 and a tolerance of 0.1 the possible thickness would be in the range 0.9 to 1.1. It is therefore important to ensure that the tolerance does not exceed the thickness as this may result in machining into the model.
, e P0 ?' h u1 m, xRFEMALE) g7 F; C' Z9 X
A flag that specifies whether to machine a male or female part. A male part represents the actual Triangle Model. A female part represents the mould required to manufacture the Triangle Model. Note that in order to create a female part you may need to rotate the Triangle Model by 180?in the Z axis using the ROTATE TRIANGLE command or by rotating the active Workplane.
# u1 I/ D) a5 k. r" BThe commands available on these parameters are:- 5 b! y' E) x2 i
Edit
3 G" [# u5 o- H. M" gEdit the thickness and tolerance. * X" S1 U, z' O% Z) D+ B# }
||--EDIT--|--RTHICKNESS--|--thickness--||
! f$ \+ s J. Q* ?# q, E | ||% ~" o7 ]) R8 m e5 Q/ W
|--RTOLERANCE--|--tolerance--||
; w3 P8 I1 `2 y1 m9 l+ u5 tSet and Unset * l& M0 x$ c" i+ ]/ D8 q& ?( O
Set and Unset the RFEMALE flag.
2 L! o X9 e! I2 x6 l J. Z ||--SET--|--RFEMALE--||
9 C/ T1 T- d5 s: E% N ||--UNSET--|--RFEMALE--||
0 A* V( J4 K$ _3 U+ }1 @
M- K: B' B! e8 e) r% \, s--------------------------------------------------------------------------------7 B$ V9 E- t( r p
Holes List Model8 ?$ N. ^' G$ W
This is a list of drilling hole positions initially created as a result of producing Drilling Paths. These holes can be moved to any suitable position in the Slices Model to produce a more effective drilling operation. 3 G) l9 [ K" C
The commands available on the Holes List are:- & l9 ~+ j) C- T8 x- t+ ^8 n: s( M
Edit 1 m* w# `! _6 |$ t+ P( O
ADD and MOVE are available to edit the holes.
' n/ W, B0 Y& ?0 l/ ]+ z7 L; v. k' fAdd a new hole by digitising a point INSIDE the Slices Model or by entering an absolute XYZ value.
( x! v- F9 l- k0 f. NMove a hole by picking an existing hole and digitising a new point. You can also select a hole by typing its absolute location and enter the new position by typing a new absolute location. ' _. O. j; w0 L0 h8 `. ?' o1 {
||-EDIT-|-HOLES-|-ADD--|-DIGITISE----------------||0 A1 F% N- e$ M4 ?7 J
| | ||
& D5 F# g0 Z/ U$ Y | |-x-|-y-|-z---------------||. o3 l$ A! p: O: m( D. w1 t7 T* l- T% f
| ||/ r. e0 V- I& o
|-MOVE-|-PICK--|-DIGITISE--------||
& g% Q" J* T2 o/ K7 l5 K8 Y | ||( E' C# @( F+ s6 m, E9 \
|-x-|-y-|-z-|-|-x-|-y-|-z-||
. X" G2 @# k* R0 T. M( fNote that once picking has started, you will need to press the right hand mouse button to leave picking mode. / o* \+ p# Y; _ x
Delete
2 z- u$ V! N5 UDelete a hole by either picking or by typing an absolute value.
" O( P( B/ L; k) r) M! [4 |/ U! i ||--DELETE--|--HOLES--|---pick----||8 d F; Y) w5 {* ?$ V( W7 n/ [
| ||! U' {4 o$ W6 s7 M4 a7 [6 I8 w
|-x-|-y-|-z-||
0 l2 i8 p* J/ tNote that once holes have been picked, you will need to press the right hand mouse button to delete the picked holes. 7 Q5 ~7 W4 R7 Z/ J6 N
Size # u) s) c- j4 ?+ W" O8 `$ F6 |$ s5 C5 G
Print the location, depth and radius of a picked hole. 4 m5 b5 z3 c# y3 X, j
||--SIZE--|--HOLES--|--pick--|
7 o% H8 o* ]/ @Draw
4 k/ @: ]2 o/ h. ], Q. _ ||--DRAW--|--HOLES--||1 D& [$ ~- d; W( s
Undraw
! k& `( m2 E! F) ~ J, e ||--UNDRAW--|--HOLES--||% Q0 i3 f3 F2 _* i0 O% T- p9 m
; b4 w$ S b4 ]( M--------------------------------------------------------------------------------) A4 I3 R B$ E* X. J& [
Drill and Cutter Paths
! w8 x! \$ y) {; g/ @These two types of paths are both sequential collections of Cutter Moves generated as a result of applying the Roughing Strategy Options to the Slices Model.
" r( C! E& v+ U* m3 K0 YDrill Paths are the cutter moves that produce the pre-drilled holes in the Block which are necessary when a non-plunging cutter is to be used for Level Moves (that is when RMOVES is set to DRILL). The position of these drilling holes can be modified by the Holes List. $ r# P3 h5 D, A' \
Cutter Paths are the moves that do the roughing.
' F3 I& o' }) M; u4 c* K6 TThe command to produce both the Drill and Cutter Paths is:-
" [0 w* Q" p' A8 R1 D+ h# n6 c7 T ||--ROUGH--|--TRIANGLES--||
0 y6 ]& E7 y; A! R- GThe commands available are:- 2 Y( _8 m+ @) }* r& | O) ?
Keep * e$ e8 ?$ [& {/ W/ g9 r
Keep toolpaths to either a DUCT picture file or a Cutter Location file:- 3 n9 b( Y( y" t' W& K
||--KEEP--|--DRILLPATHS----|--file name--||
" R9 X) h$ n" H- k# i% c5 d4 c | ||
- u e6 l6 G1 ?! L |--RCUTTERPATHS--|--file name--||3 m1 O# i" X% X
Draw
; U6 I: m: x8 Y
( D' L+ G* t2 Z7 }/ |! d5 S ||--DRAW--|--DRILLPATHS----||
- e& J! z7 H" q6 l& x9 ] | ||$ l* Z* a4 N8 M% R p. _" u
|--RCUTTERPATHS--||0 P7 f7 n" s& q$ a
Note that a flag called RCUTTERPATHSLINK is provided to control whether the linking moves are shown. When SET (the default state) link moves are shown and when UNSET, they are removed.
- E1 u+ ?1 Z8 ^* b( B3 e) SAnimate ( I- j$ L; H4 M0 g, g# D# o
4 ?! m; F( ]- v, M' X
||--ANIMATE--|--DRILLPATHS----||2 q! k+ @5 j; l4 O4 p2 G: ]! p
| ||
2 |# K2 n# j" ~$ U |--RCUTTERPATHS--||
* S+ A3 G9 `/ L# r5 M8 e N: H# jTo fully understand the various roughing strategies we need to describe the various components of a Cutter Move. This consists of four types of tool movement relating to the location of the tool and its cutting status:- : Q# O1 w/ q) s/ S, o+ T8 K( h
Rapid Moves - used to move the tool in air at rapid speed.
: j- T( E5 E7 ALevel Moves - used to get the tool from one pre-machined Level Area down to an unmachined Level Area.
- U7 ]% ~' k$ X$ q& d1 @# s$ m: F7 kProfile Moves - used to machine the Profiles associated with each Area.
& J; e! r9 h5 X0 fArea Clearance Moves - used to machine the Area enclosed by the Profiles ' n5 h Q1 ~& B2 b
Note that no metal removal is allowed during Rapid Moves.
8 Q7 ?" J, C; y* E% sRapid Cutter Moves, o- n0 k4 e# _& V5 Q
Rapid moves are performed at rapid speed (defined by the parameter RSPEED) and are required to move the tool between two points in the shortest possible time. They generally consist of these three moves:-
* a$ O+ J; i( {( r( I* kUP - An up move from the last cutting position to a safe Z height.
6 F0 p7 b& q0 d& B; TACROSS - An across move at constant Z to the new start cutting position.
: v( r4 `; p. k+ `2 J) m2 eDOWN- A down move to the new start Z height. 2 @* |1 c& K/ k% G" [# ^
There are also four parameters associated with Z heights that are used during rapid moves:- , [% f# j% m) S" O- D o
SAFZ - Absolute value in Z which the tool will lift up to and move across at. 4 I4 D7 P8 F# T8 X" S$ ^' @9 D
STAZ - Absolute value in Z which the tool will move down to. 5 @3 {8 y/ l# w
ISAFZ - Incremental value in Z above a pre-machined level to which the tool will lift up to and move across at.
( O. d' C9 y x7 K5 fISTAZ - Incremental value in Z above a pre-machine level to which the tool will move down to.
# [$ I/ f9 V- ]4 Y2 _, _These are described in more detail in the section on Tool Z Heights. 3 m! _* f. W7 D6 s
Level Cutter Moves0 I! e; p* m3 i3 j0 e, _5 i
Level moves (defined by the parameter LMOVES) are required to move the tool between start Z and the level to be machined. The operation is performed at plunge rate (defined by parameter PRATE) and can be one of the following:- . E4 G; B# R P0 f7 W( ~7 J
PLUNGE - Plunges at Plunge Rate directly into the model with no consideration for pre-drilled holes. 0 n; Q, n7 I& _$ ?, J' A0 P4 Y
RAMP - Ramps in at anangle defined by the parameters defined below.
' i" a* a5 n5 V9 ?- o Z3 wDRILL - Plunges at Plunge Rate into pre-drilled holes created by the Drill Paths. These will automatically produce a Hole List which can be modified later. 1 C/ x- G! o0 A F
The command to edit the LMOVES parameter is:- 0 C8 h4 Y g4 q3 J4 H
||--EDIT--|--LMOVES--|--PLUNGE--|| ) g8 J' _9 t0 r! V( t+ t
| ||
3 `' \; q1 D/ Y, h( q/ i" Y |--RAMP----||
# D( X0 p( D9 b0 n+ z1 @, t | ||* o3 t; V( Q; ?
|--DRILL---||
5 l! d2 |# w3 F9 KThe commands to specifically control the ramping are:- % d# h2 J; A+ R2 ^
||--EDIT--|--RAMP--|--ZIGANGLE--|--angle--||- {% B5 Z' z+ }
| ||" i5 _9 }5 y) x( l: \
|--FOLLOW--|--PROFILE--||, i# A9 P! U! A5 [) o- ~
| | ||" v+ e' d" y& `
| |--LINE-----||- _( x- N* q3 H* i
| | ||1 |% J1 d- y3 ?5 H# |
| |--CIRCLE---||1 c: q1 d U1 e, W% o2 c& q7 g
| ||% z9 D$ m$ c$ x) R4 J8 J' W
|--DIAMETER-|-diameter-||& }; G, U% f2 {( ^2 Q, U
| ||
; A/ f+ b- a5 s( O/ ? |--FINITELENGTH--|--Y--||
r% x! y1 q& z/ b4 [ | | ||8 s! \( `$ A0 s' R0 X3 V9 X1 l
| |--N--||5 V+ ` D' n* Q2 q3 O
| ||1 ~1 E4 Y( Q0 b/ _$ t- ~
|--LENGTH---|--length--||4 O/ u- }, q* }, V' y
| ||
' ?3 p! {5 c2 h' P5 z3 O |--INDYZAG-------|--Y--||! o1 v; W6 T k' @ q5 L
| | ||
, j/ |& P; }0 R& o$ E' _6 v | |--N--||
6 _5 b& Q3 |+ E; D7 Q: T7 r7 f | ||
; j, A5 {, S7 @- x1 U8 m8 @2 q |--ZAGANGLE--|--angle--||. d7 r! z8 s% c( o. C
Where:-
& m' P. E; }3 c- E# L) bZIGANGLE - controls the zig angle within the range of 0.01 to 89 degrees.
/ h- q9 C' x" a# J8 B3 f: c0 N' OFOLLOW - controls the direction of the ramp i.e. either along the touching profile or along a line running normal to the contact point or around a circle. Note that the line method is automatically used if a circle cannot be accommodated into the area and the profile method is automatically used if a line cannot be accommodated in the area. 0 w! h. E7 V& q7 r5 f6 ?9 Y# M
DIAMETER - controls the circle diameter. Note that this value is represented in Tool Diameter Units. 1 A s5 u6 L' e1 e
FINITELENGTH - controls whether the ramp length if finite or infinite. 9 B8 C2 r# p9 W& g# q- v. R( i, g
LENGTH - controls the ramp length. Only valid if FINITELENGTH is set to Y. Note that this value is represented in Tool Diameter Units.
' i/ R& t/ d% J) ?' DINDYZAG - controls whether the zig angle is independant of the zag angle. Only valid if FINITELENGTH is set to Y.
5 F* E. i1 y. k. M' `) AZAGANGLE - controlsthe zag angle within the range of 0 to 89 degrees. Only valid if INDYZAG is set to Y. p m( V/ n8 F N7 o
When SET, a flag called OUTSIDE forces the Level moves to approach the Block Model from the outside. Approachable Spans in the Slice Model are drawn in magenta to indicate their availability for this type of level move. Note that this option is not available if the Block Model is defined by the 2D Picture or 3D Triangle Model.
& E$ U5 N9 z: o8 ?Profile Cutter Moves
, X9 z) N) U* v _% K! o3 i3 T' p" eThese are optional profile moves (defined by the parameter PMOVES) to guide the tool around the profile at feed rate (defined by the parameter FRATE) and can be performed either before, during or after the Area Cutter Moves.
2 `% D9 Y. J% @4 f1 A$ u$ _The during option is a special form of profile move that deserves further explanation. Using the before or after options forces the tool to perform two Cutter Move operation with associated Rapid and Level moves. Using the during means that a profile move is performed the first instance an area clearance path touches that profile. / Q' b2 L2 A' d$ t; F! d' S) b3 {
The command to edit PMOVES is: ; ~! K1 h. _$ B
||--EDIT--|--PMOVES--|--NONE----|| t3 w N- X. e; @
| ||
) {: s% y2 ^, R& Q9 y |--BEFORE--||7 Q, n' Y$ Q" n7 S& b6 k }
| ||4 Q6 @' R" V: j6 m2 A" O
|--DURING--||$ y9 ]: }) q6 j$ f9 |1 z
| ||
; R" U1 O7 S: q3 N, s& ? |--AFTER---||/ w0 i# ?, N3 U- n6 I: l
You can force Profiling Cutter Paths to use particular milling technologies via the parameter PCUTDIR:-
7 n; h3 g+ {4 n$ J0 U/ P# m. {1 C ||--EDIT--|--PCUTDIR--|--ANY-----------||
" H& `+ s: Q) v1 @3 l2 V | ||
7 ~6 j$ X8 z; q# ^! b |--CLIMB---------||
) c% p8 ^* i b4 ^, [7 w/ | | ||: G' A) e$ A U
|--CONVENTIONAL--||
9 b! ~ N) v, _. C, n0 \3 U# j/ PIt is sometimes possible to omit the Outside Profile moves as they can be cleared out by the area clearance moves. A flag called POUTSIDE, when SET, forces the outer profiles to be machined and when UNSET forces them to be ignored. When using blocks that do not completely enclose the Triangles Model, the moves will only take place where the spans lie within the block. Note that all spans to be ignored are drawn in a dashed line style. Note also that this option is not available if the Block Model is defined by the 2D Polyline or 3D Triangles Model. . H1 w7 D3 ^9 }9 a4 t
Area Clearance Cutter Moves& v# D; V3 {. e8 v6 w- C" v
The area clearance moves are responsible for clearing the material contained within the profiles. The current strategies supported are Profile, Raster and Offset. These are described in more detail in the next section.
" V& x; ^: X- i$ y2 C! W+ W3 ?$ dArea clearance strategies are selected via the edit command on the RSTRAT parameter:-
% {& I6 w( C2 k- o' G ||--EDIT--|--RSTRAT--|--PROFILE--||
4 t8 C( d5 k& S e e8 P5 K- w | ||6 K, z5 h- V3 t) t* O- ~. m- b7 }
|--RASTER---||
5 z% c, T5 q# T6 a0 v | ||7 J# J9 e0 C6 T' S$ G1 J
|--OFFSET---||
* C, z% ]0 h0 n6 K' [7 ^, n. o/ k* uThe stepover between Cutter Path passes is defined by the parameter OVER:- , x0 T5 k' L( D% } J) u2 S" Y3 B
||--EDIT--|--OVER--|--stepover--||7 n6 |. i5 ~, ?/ x! u1 m
You can force Area Clearance Cutter Paths to use particular milling technologies via the parameter ACUTDIR:- ! W+ `9 |1 a0 ?4 f4 \
||--EDIT--|--ACUTDIR--|--ANY-----------||
! j9 b4 C! ^5 f5 y% X) Q' `( Z | ||
" u! x* L' q+ f. W |--CLIMB---------||% O) n" F/ X1 S" Z. F! g+ O) J
| || E' Z$ u# |2 ~
|--CONVENTIONAL--||
' n, f2 h _8 y3 P) T5 `( Y
/ v; _0 Q9 R7 g1 G# A4 H--------------------------------------------------------------------------------
" }- v2 \0 e' u/ M5 y1 X0 Q; a. FRaster Area Clearance Strategy
' Y/ ~" _ p. _- dA raster area clearance strategy clears an area with equally spaced parallel lines laid across the profiles and joined together by cutting moves around the profiles. 5 X1 k" y( O7 M3 b" R. \
You can force the raster stepover to be constant over the whole Area by setting a flag called CSTEPOVER. This ensures that raster Cutter Paths are guaranteed to lie on both edges of each Area so that an even cut will be maintained. 4 c) [$ Q( l/ l1 d. H4 ~4 R- t
Two options are available when creating the raster paths:- : O6 t5 M0 Y0 I9 V4 L
Angle - raster angle relative to the X axis.
$ z( P0 ^% N9 n, M( r2 KJoin Up Search Range - search range when joining rasters.
9 |9 j8 E3 D! A; X* U9 x$ x' s% t' Z1 wRaster Angle \8 q& r% a, y D; k' b1 L+ X
The angle of the rasters can be defined manually (i.e. 33 degrees) or automatically. Auto calculation allows PowerMILL to select what it considers the best angle. The best angle can be based on an individual area, a whole level, each pocket or the whole model. 3 p% b1 T) \2 k' A0 F4 k3 [' d
The Manual/Automatic action is controlled by the Flag AUTOANGLE. When AUTOANGLE is SET the Parameter AUTOANGLEMODE determines the search range:-
/ J! {/ R- D* F( j! o ||--EDIT--|--AUTOANGLEMODE--|--AREA----||1 Y; S7 O- I5 e
| ||0 Q }! A0 `2 u. \ ^8 F9 b
|--LEVEL---||) a+ r! }( M9 g' c8 @% C
| ||
% W$ k4 B# g* Y; B: n; W |--POCKET--||+ C3 y/ ^( A* \. ?
| ||' f2 v/ _: W0 Y4 @& u7 S2 s
|--MODEL---||8 f8 ?* `+ B, ^5 e
When AUTOANGLE is UNSET the Parameter RANGLE defines the raster angle to be used throughout the whole model:-
, J4 G* e4 c$ I" f9 }: x9 ^ ||--EDIT--|--RANGLE--|--angle---||
8 i, U X/ X" ]2 I; _4 C4 u: ^ | ||
$ Z2 L; A- E' G% N# P4 q |--XAXIS---||& Q7 W7 y+ k6 d0 Z" o
| ||, n' U! |4 Q4 Z$ J3 j
|--YAXIS---||; Q2 e$ ~ ~* u" T9 G+ S/ P8 Y
XAXIS and YAXIS are only provided to force the raster angle to 0 and 90 degrees respectively.
4 ^- p$ p" ^1 C! C9 J, yJoin Up Search Range2 \$ N# K- L( P" `& f2 V
A parameter called RJOIN controls the search range for join up moves between Raster Spans. A large value will ensure that the tool lifts the minimum number of times but it may also mean that the tool is spending large periods of time travelling around join up moves. Conversely, a small join up range will result in more lifts but less time travelling around join up moves.
" _' F' i# ^) y0 Q% ~The command to modify RJOIN is:- & }4 F( {7 L7 P
||--EDIT--|--RJOIN--|--range--||
: _, W$ ^+ E- X4 MA flag called IRJOIN when SET forces an infinite join range and consequently invalidates any value in RJOIN.
0 u& b) T$ G: g. e4 o% o$ dRaster Span Optimisation
2 n9 ]. D5 c8 o& ?The definition of an unnecessary Raster Span is one that, if a tool were to pass along its length, would not remove any material. This can only happen if a profiling move has, or is about to, pass along the same area.
$ g* s- r: S: g5 ZThe two instances where unnecessary Raster Spans are found are:- D9 C0 f. D, v R
The first and possibly the last Raster Span of an area.
8 N4 D6 e8 \" B6 RWhere Raster Spans are shorter than the diameter of the Tool.
' Q& Z: _! @9 Q, `" F* r6 @When SET, a flag called RSPANS forces unnecessary Raster Spans to be left unmachined. When UNSET, all raster spans are machined. ! F! Q! V+ U( q1 Y$ n& n9 E; q8 K, O$ I
Minimise Full Width Cuts
x- f8 N. a' |, t7 mBecause of the searching nature of the raster pattern, it is possible for the tool to occasionally be cutting on its full width. This is not generally a problem when cutting soft material but can cause damage to the tool when cutting hard material. When SET, a flag called MINFULLWIDTH, removes all raster moves that could cause the tool to cut on its full width. Note that when SET, this flag disables the Join Up Search Range option.
" Q* F0 w! n; w" l- t" G( z! g--------------------------------------------------------------------------------2 P0 V+ m: j& {: A: p) _
Offset Area Clearance Strategy
: R: T9 a' q: @0 W; z# v- j3 ?An offset area clearance strategy clears an area with contours generated by offsetting the initial slice. Subsequent offsets are taken of the previously offset slice until no further offset is possible. - A+ G1 x9 d8 l$ @# R$ k8 C& x% C
The direction of offset moves can be controlled by the OFFSETDIRECTION variable:-
* T# V* k" K0 g8 M ||--EDIT--|--OFFSETDIRECTION--|--INSIDEOUT--||3 o! ~" @0 \1 d7 P6 @3 I
| ||7 y+ G/ z2 _- p3 ~
|--OUTSIDE----||5 d U* u4 K- B3 G
| ||4 H; K+ W( N+ X4 y( X* X
|--AUTO-------||
: w# ^7 ^3 K& `4 A& R7 ~where:- % ^6 W2 { o: s* h' y% y8 c
InsideOut - Machine from the innermost profile, moving outward
7 l% V/ h" x: }4 H6 z$ T: mOutsideIn - Machine from the outmost profile, moving inward % z( \# l& Z4 Q7 h+ x9 U. P K& X: F V
Auto - Automatically select either of the previous methods based on whether a core or cavity is being machinined. The definition of a core is an area whose outermost boundaries are ALL lying on the outside of the block.
- x1 Q* ]- k N4 F) RDetecting Unmachined Areas
m; q2 N6 }$ d4 k9 j6 uSelecting a stepover distance greater than the tool radius can lead to small islands of material being left unmachined. Such stepover distances modify the offset behaviour of PowerMILL and result in small areas being automatically detected and machined by the inclusion of additional toolpaths that are integated into the main toolpath.
: E' j0 z9 s2 [. D- HMachining Smallest Areas First" y' Q) Y4 E; x
It is sometime advisable to machine the smallest offsets first to avoid the tool damage that can occur if these small offsets are machined last.
9 [) A# F6 G; V5 Y; {The order of machining can be controlled by the SMALLESTOFFSETSFIRST variable:- $ C# v$ s0 d4 ?6 {, P9 R
||--EDIT--|--SMALLESTOFFSETSFIRST--|--ON---||4 w$ t( }8 `) {- O
| ||
5 ~' e. [5 b$ E5 \6 L# H |--OFF--||
0 c. f* j# `3 i0 X3 wThe defualt value of this variable is OFF
f5 w0 F* i, l--------------------------------------------------------------------------------
) I! w/ n U3 v- v4 K: uPocket Machining
0 {0 B+ o! |0 J! y4 QWhen SET, a flag called POCKET forces Areas to be machined in a pocket by pocket strategy. When UNSET Areas are machined Level by Level.
- z6 A3 a$ k6 ?5 Q( A6 ?1 I w--------------------------------------------------------------------------------
4 ~$ v8 s7 R- A# y6 eArea Filtering+ [: B) m r3 N+ e0 r
Area filtering enable areas to be automativally ignored based on their size relative to the tool diameter. This enabled small areas to be machined using a different method to large areas. 7 C3 B; ^) k& @0 Z
A parameter called AREAFILTERVALUE controls the threshold size that all areas are compared against. This value represents the ratio between the tool diameter and the longest principle axis of each individual area. For example, a value of 2.0 indicates that the length of the longest principle axis of an area is compared against twice the tool diameter of the tool used to generate the slice.
l5 {4 t) w0 v7 U7 aThe command to modify AREAFILTERVALUE is:- $ {0 T2 l5 t+ N4 Y
||--EDIT--|--AREAFILTERVALUE--|--value--||
# R! t5 R( U' k: ~) XThe filtering action to peform on areas is controlled by the AREAFILTERMODE parameter. This enable you to remove either smaller or larger areas.
3 c$ L6 q, c8 YThe command to modify AREAFILTERMODE is:-
& h2 s* L7 b8 T9 @: l% T; K$ T ||--EDIT--|--AREAFILTERMODE--|--NONE-----||
, r$ h6 w9 U+ j5 A9 F- o( O | ||
( K- o% M- T0 M( `; T- }8 _, j |--LARGER---||* T5 m, X9 B! e: ?. K
| ||+ z# U: S$ Y- n- n+ V% K
|--SMALLER--||
6 l$ {/ N* _. u& f C" Z5 hNote that filtering takes place after the toolpaths have been calculated. This enables different filtering thresholds to be quickly used to determine the most appropriate value. Note also that drilling toolpaths are not affected by the filter so a single drilling toolpath can be used for any filtered toolpath. This does however mean that it is possible to generate a drilling move for an area that hasn't been machinined or a drilling move to a depth greater than required.
. K# C8 s _6 [Note that it is also possible to achieve the same result as filtering by using the delete option.
" L2 d/ E: y( a' ^: }Rest Roughing
# M m' w+ t, h# U9 WRest roughing is the process of generating roughing toolpaths that only remove material unmachined by a previous roughing toolpath.
* ]# G. h8 q4 U" G7 M) TThe command to enable/disable rest roughing is:-
1 I$ T3 `1 |* t, \& }/ H ||--EDIT--|--AREACLEAR--|--REFERENCE--|--ENABLED--|--ON---||) W5 k6 n# X9 M" g. I
| ||
8 t- U6 d; U7 K2 G$ E+ `+ ? |--OFF--||
. {. ?, T( d+ N6 zOnce enabled, it is possible to select a reference roughing toolpath via the command:-
4 M$ P2 V2 r! ]% j: h ||--EDIT--|--AREACLEAR--|--REFERENCE--|--NAME--|--name--||; ~+ Y& b3 F' G
Any subsequent roughing toolpath will now only machine areas unmachined by the reference toolpath." B1 y2 ?. M6 e2 u% S
% o( Q' e) A- i1 D[ 本帖最后由 moki 于 2008-12-16 18:42 编辑 ] |
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