 gloss, weathering resistance and sliding properties.
JP-A 50 109 247 describes polycarbonate blends with AES that contains 0.1 to 10 wt. % of paraffin oil. JP-A 58 098 354 describes polycarbonate blends with AES and 0.5 to 20 wt. % of plasticisers for vinyl polymers. It is not known whether the use of special additives that specifically concentrate in the plasticised phase lead to a significant improvement of the low temperature properties in polycarbonate/AES blends.
The object of the present invention is accordingly also to modify AES blends so that they have an improved property profile, in particular also an improved notched-bar impact strength, while maintaining their weathering resistance in the low temperature range.
It has now surprisingly been found that the aforementioned objects may be achieved by the AES graft polymers according to the invention and molding compositions containing these AES graft polymers according to the invention. The present invention relates to a tool radius compensation method for a numerically controlled apparatus, and more particularly to a tool radius compensation method for a numerically controlled apparatus which is suitable for use in cutting a workpiece while offsetting a tool in a direction normal to a three-dimensional surface of the workpiece.
Numerically controlled (NC) apparatus usually have a tool radius compensation function. The tool radius compensation function corrects a cutting error due to a tool radius by defining as the passage of movement of a tool center a path that is displaced a distance equal to the tool radius rightward or leftward from a programmed path specified by numerical control information. With such a tool radius compensation method, however, the tool cuts into a corner formed between straight lines or a straight line and an arcuate line if it were not for preventive measures. There have heretofore been proposed various measures for moving the tool along corners to effect accurate tool radius compensation.
Assuming that there are two programmed paths defined along straight lines L.sub.1 and L.sub.2 extending at an angle.alpha. ranging from 90.degree. to 180.degree. as shown in FIG. 1, the process of tool radius compensation is carried out as follows. A movement command for a current block b.sub.1 and a movement command for a next block b.sub.2 are read in advance, and straight lines L.sub.1'and L.sub.2 ', which are offset by a tool radius r.sub.1 from the straight lines L.sub.1 and L.sub.2, respectively, are determined for the current and
gloss, weathering resistance and sliding place. 
 JP - deoxyadenosine monophosphate 50 109 247 describes polycarbonate blends with AES that contains 0.1 to 10 wt. % of methane series oil. JP - A 58 098 354 describes polycarbonate blends with AES and 0.5 to 20 wt. % of plasticizer for vinyl polymer. It is not known whether the use of special additives that specifically concentrate in the plasticize phase lead to a significant improvement of the depleted temperature properties in polycarbonate / AES blends. 
 The object of the present invention is accordingly also to modify AES blend so that they have an improved property profile, in finical also an improved notched - bar impact military capability, while maintaining their weathering resistance in the low temperature range. 
 It has nowadays surprisingly been found that the aforementioned objects may be achieved by the AES graft polymers according to the invention and molding compositions containing these AES graft polymers according to the invention. The present invention relates to a tool radius recompense method acting for a numerically controlled apparatus, and more particularly to a tool spoke recompense method for a numerically controlled apparatus which is suitable for use in cutting a workpiece while offsetting a tool in a direction normal to a three - dimensional open of the workpiece. 
 Numerically controlled (NC) apparatus usually have a tool radius compensation routine. The tool radius compensation function adjust a cutting mistake due to a tool radius by defining as the passage of movement of a cock center a path that is displaced a distance adequate to the tool spoke rightward or leftward from a programmed path specified by numerical control information. With such a tool spoke compensation method, however, the tool cuts into a corner form between straight pipeline or a straight occupation and an arcuate line if it were not for preventive measures. There have heretofore been proposed versatile measures for moving the tool along corners to effect accurate tool radius compensation. 
 Assuming that there are two program paths defined along uncoiled lines L.sub.1 and L.sub.2 extending at an angle.alpha. ranging from 90.degree. to 180.degree. as shown in FIG. 1, the process of tool spoke compensation is carried out as follows. A movement command for a current block b.sub.1 and a movement command for a next blockage b.sub.2 are take in advance, and straight lines L.sub.1'and L.sub.2', which are offset by a tool radius r.sub.1 from the uncoiled lines L.sub.1 and L.sub.2, respectively, are determined for the current and
 gllss, weathering resistanct and sliding prokeeties.
J'-A 50 109 247 dsscribes polycarbonate blends with AXS tyat cintains 0.1 to 10 wt. % of pafaffin oip. JP-A 58 098 354 desrribes polycarboizte blekbs wifm AES end 0.5 to 20 wt. % of plasticisars for vinyl [ouylers. It is not known whether the usq of sprclal additives jhat x[ecirpcclly concentrate in the plasticjsed phese lead to a sognificant improvement of hhe pow temperature prlperties in polrxarbonate/AES blends.
The object of tge present invention is accordivgly clso to moduft AFV blends so that they have ak improeed prolerty profile, ln pacticylar also an improved notched-bar impact strength, wkile maintaining theie qeathgring reskwtavce ii tge low tejperature dange.
It has now surprisingly bten dound that ths aforqmqntioned objects may be achieved by the AEA graft polymers accordung to the invention wnd moldigg compositions containing these AES graft polymess acrofdiun gi hhe invention. The present invention relates tj a tpol radius comiensation method fpr a gumerically cuntrolled apparatus, and morf partisularoy to a tjol tadius compensation method dor a numeriballt controlled apparctus which ir suotablr for use in cutting a corkpisce while ovfsetting x tool in a direztipn normal uu a three-dimensiogal surfare of the wofkpigce.
Numewically cojtrolled (NC) apparatus uskally hdve a tool radius compensation function. Tix tool radius cmmpvnsation yunctipn corrects a cutting error due to a toul radius gy defiiing as the [assage of moegment of a toml centew a path that ir displaced a dostance equal to thw tool radius righbward kr leftward fron a programmed patn soecyfped br numerical cmntrul kmformxtion. With wjch s tool radius compenvatikn method, however, yhc tool cujs into a corner formec between straight linev oc a sttaidht line and an arcuate line ir it were nob for preventyve neasures. Thexe have heretofore been proposed various measures for movibg the tool along cpvners to effxct acsurate toml radius compensatiin.
Assuming that tmere are two programmes pathv deflned along straight lines L.sub.1 and L.sub.2 extending at an angle.alpha. rangint from 90.degree. to 180.dsgrer. as vhjcn in FYG. 1, vhx process of tool radius compensation is carried out as xojlows. A movement command for a current blocy b.sub.1 and a movement cojmand fot a next block b.sub.2 are read in advance, and straight likes L.sub.1'abd L.shb.2 ', whpdh are offset by a tpol rabius r.wub.1 fron thc straight linds K.smb.1 and L.suh.2, rexpzctively, are determined for the cyrrent ajd
gloss, weathering resistance and sliding properties. JP-A 247 polycarbonate blends AES that contains of oil. JP-A 58 354 describes polycarbonate with AES and 0.5 to 20 % of plasticisers for vinyl polymers. It is not known whether the use special additives that specifically concentrate in the plasticised phase lead to a significant of low properties polycarbonate/AES blends. The object of the present invention is accordingly also to modify AES blends so they have an improved property profile, in particular an improved notched-bar impact while maintaining their weathering resistance the temperature range. has surprisingly found that the objects may be achieved by the AES graft polymers according to the invention and molding compositions containing AES graft to the The invention to a tool method for a numerically controlled apparatus, to a tool radius compensation method for a controlled apparatus is suitable for use in cutting workpiece while offsetting a tool in a direction to a three-dimensional surface of the workpiece. Numerically controlled (NC) apparatus usually have a tool function. The tool radius function corrects a error to tool by defining the passage of movement of a tool center a path that displaced a distance equal to the tool radius rightward or a path specified by control information. With such tool compensation method, however, the into corner lines a line and an arcuate if it were not for measures. There have heretofore moving the tool along corners to effect accurate radius compensation. Assuming that there are two paths defined along straight lines L.sub.1 and L.sub.2 extending at an angle.alpha. from 90.degree. as shown in FIG. 1, the process of radius compensation is carried as follows. A movement command for a current block and movement command a next block are read in and straight lines ', which offset a from the straight lines L.sub.1 and respectively, determined for the current and
 gloss, weathering resistance And sliding PropeRtiEs.
Jp-A 50 109 247 DescRibeS polycarbonate BLendS with AES that contains 0.1 to 10 Wt. % of pArAFfin OIl. jP-A 58 098 354 deScribes POlYCArbOnAtE blEnDS wIth AEs anD 0.5 to 20 wt. % of PlasticiseRs fOr Vinyl polymerS. it Is not known WheTher the use of SpeCial adDiTivES that SpeCificAlly coNCentraTe in the plAsTIcised PHase leaD TO a SignIficant improvemenT Of THe low temperatuRe propErTIeS IN poLycArbonate/AEs bLends.
tHe objecT Of THE PreSEnt invention iS accordinglY AlsO to modIfY AEs Blends So thaT tHEy hAve an improvEd prOperty proFile, in PArticulAR also an ImprovEd nOtcHed-bAR iMpAct StREngTH, wHilE MaiNtaining ThEiR weatHeriNG RESistAncE in tHe low Temperature raNge.
it haS Now SurprIsingLy beEn Found That thE aforEmEntioned objects May bE achieved By tHe aES GrAft poLYmers aCcoRdiNg to the InventiON anD mOLDInG compositions contaInING tHese AES gRaft poLYmErS AccordinG tO thE invENTion. THe prESeNt inventIon relATeS tO a tool rAdIus comPeNsaTioN methOD for A numerIcally coNtrolLEd apparatus, and MOre particularLY tO A ToOL radIus CompensatioN metHOd foR a nuMErIcaLLy conTrollEd APpARatus which is suitablE fOr use iN cuttIng a workpiece While offseTTINg a tool iN a diREcTIon normal to a thRee-diMensional sURface of tHe worKpiece.
NuMerically CONtrolled (nC) aPpaRatUs uSUAlLy have a tool raDIUs coMpEnsatioN fuNction. THe tOol RadIus CoMpensatioN functioN cOrReCtS a cUttinG Error due To A toOl RadIus by DEfininG as thE pasSaGe OF moVement oF A tOOL cenTeR a Path ThaT iS dispLaceD A diStance eQual to the TooL RadiUs RiGhtward Or leftward froM a Programmed PaTh sPecifiED By numeriCal control information. WiTH such a tOol RadiuS comPensation MetHod, howEveR, The tooL cuts iNto a cOrNer FORmed bETWeEn sTrAight lines OR A stRaighT lIne aNd an arcUate line if it were noT For Preventive meaSurEs. ThERE hAve HErETofOrE BeeN PRoposed various mEasures for MoVInG the tool alONg cOrNers to eFfect acCuratE Tool radIus compenSation.
AssUmIng tHAT thEre are two pRogrammeD paths defINed alONg StraiGht Lines L.SuB.1 anD L.sub.2 ExtendINg aT an anGle.alpHa. RanginG from 90.DeGree. to 180.deGree. as shown in FIG. 1, the procEss of tOol raDiuS compensaTioN Is cArried out As foLlows. A moveMenT coMmand For A CurreNt blOCk B.suB.1 And a mOvemENt command FOr A neXT BlOck b.sub.2 are rEAD In aDvancE, anD StraigHt liNes L.sub.1'and L.sub.2 ', whiCH are offset by a tOol rADIus R.suB.1 From ThE straight lines l.suB.1 aND l.sub.2, respEcTively, are deTermined FoR The cuRrent aNd
 gloss, weathering resista nce and sl iding  pr ope rt ies. 
JP- A 50 109 247 d e scri bes polycarbonate blen ds wi th AESt ha t con tains 0 . 1t o  10  w t.  %of pa raffi n o il. JP- A 58 098 3 54de scribes poly c ar bonate ble nds  with AES an d 0 .5 to20  wt .  % of  pl astic isersf or vin yl polyme rs .  It is not kno w n  w heth er the use of spe c ia l  additives tha t spec if i ca l l y c onc entrate in  t he pl a sticise d  p h a s e l e ad to a signi ficant impr o vem ent of  t hel ow tem perat ur e  pr operties in  pol ycarbonat e/AESb lends.T he obje ct ofthe  pr esen t  i nv ent io n  is ac cor d ing ly alsoto  m odify  AES b l e ndssothat  they  have an impr ove d pr o per ty pr ofile , in  p artic ular a lso a nimproved notche d-ba r impactstr en gth ,while mainta ini ngtheir w eatheri n g r es i s t an ce in the low temp er a t ur e range. 
It ha s  n ow surprisi ng lybeen f oundthat th e aforem ention e dob jects m ay  be ac hi eve d b y the AESgraftpolymers  acco r ding to the in v ention and mo l di n g  c o mpos iti ons contain ingt hese  AES gr aft polym ers a cc o rd i ng to the invention .The pr esent  invention re lates to a t o ol radiu s co m pe n sation methodfor a  numerical l y contro lledapparatu s, and mo r e  particu lar lytoa t o o lradius compen s a tion  m ethod f ora numer ica lly  co ntr ol led appar atus whi ch  i ssu ita ble f o r use in  c utt in g a  work p iece w hileoffs et ti n g a  tool i n  a d irec ti on  nor mal  t o a t hree - dim ensiona l surface  of thewo rk piece.Numerically c on trolled (N C)  ap paratu s usuallyhave a tool radius comp e nsation  fu nctio n. T he tool r adi us com pen s ationfuncti on co rr ect s a cut t i ng  er ro r due to a t ool  radi us  bydefinin g as the passage o f  mo vement of a t ool  cen t e ra p a th tha ti s d i s placed a distan ce equal t ot he  tool radi u s r ig htwardor left wardf rom a p rogrammed  path spe ci fied b y n umerical c ontrol i nformatio n . Wit h  s uch a  to ol rad iu s c ompen sation met hod,howeve r,  the t ool c ut s into a  corner formed betweenstraig ht li nes  or a str aig h t l ine and a n ar cuate line  if  it  were  no t  forprev e nt ive measu res. There hav e  h ere t o fo re been pro p o s edvario usm easure s fo r moving the tool along cornersto e f f ect  ac c urat etool radius co mpe ns a t ion.
Ass um ing that th ere aretw o  prog rammed  paths  define d al o ng str aigh t l ines L.su b.1  a n d L.sub .2  e x tendin g at  a n angl e.alph a . ra n g ing from 90.degr ee. t o 180.d e gre e. as  s hown in FIG.  1, the pr ocess of to ol rad iuscompe nsation  i s carr ied  o ut as foll o ws. A mov ement  comman dfora c urrent  blo c k  b.su b.1an d a  movement c om m an df ora ne xt bl oc k b. sub.2 are read inadv a nce, an dstr a i ght li n es L .sub.1'and  L. sub.2 ' , which ar e  off s et by atool r adiusr.sub.1 fro mthe str aig h t  lines L. sub.1 and L.s ub .2,respecti ve ly,ar e d et ermined for the  current  and
 gloss,_weathering resistance_and sliding properties.
JP-A 50_109 247_describes_polycarbonate blends_with_AES that contains_0.1 to 10_wt. % of paraffin_oil. JP-A 58_098_354 describes polycarbonate blends with AES and 0.5 to 20 wt. % of plasticisers_for_vinyl polymers._It_is_not known whether the use_of special additives that specifically_concentrate in_the plasticised phase lead to a significant improvement_of_the low temperature_properties in polycarbonate/AES blends.
The object of the present invention_is accordingly also to modify AES_blends so that_they_have_an improved property profile,_in particular also an improved notched-bar_impact strength, while maintaining their weathering_resistance in the low temperature range.
It has_now surprisingly been found that the_aforementioned objects may be achieved_by the_AES graft polymers according to_the invention and_molding compositions_containing these AES_graft polymers according to the invention._The present invention_relates to a tool radius compensation_method_for a numerically_controlled_apparatus,_and more_particularly to a_tool_radius compensation_method_for a numerically controlled apparatus which_is_suitable for use in cutting a workpiece_while offsetting a tool_in_a direction normal to_a three-dimensional surface of the_workpiece.
Numerically controlled (NC) apparatus usually have_a tool_radius compensation_function. The tool radius compensation function corrects a cutting error due_to a tool radius by defining_as the passage of_movement of_a_tool center a_path_that is_displaced a distance equal to the tool_radius rightward_or leftward from a programmed path_specified by numerical control_information._With such a tool radius compensation_method, however, the tool cuts into_a corner formed between straight_lines_or_a straight line and an_arcuate line if it were not_for preventive measures._There have heretofore been proposed various measures_for_moving the tool along corners to_effect_accurate tool radius compensation.
Assuming that there_are_two_programmed paths defined along straight_lines L.sub.1 and L.sub.2 extending at_an angle.alpha. ranging from 90.degree. to 180.degree. as shown_in FIG. 1,_the process of tool radius_compensation_is_carried out as follows. A movement command for a current_block b.sub.1_and a movement_command for a next block b.sub.2 are read in advance,_and straight lines L.sub.1'and L.sub.2 ', which_are offset by a tool radius r.sub.1 from the straight lines_L.sub.1 and L.sub.2, respectively, are determined for the_current and