About the G function of coordinate department and coordinate

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(G90 of process designing of 1) absolute value and format of G91 of relative value process designing: G90 G91 explains: G90: Absolute value process designing, the process designing value on reference axis of every process designing is opposite at program origin. G91: Relative value process designing, the process designing value on reference axis of every process designing is opposite of at before one position character, this value is equal to the distance that moves along the axis. When absolutely process designing, with G90 the X at the back of the instruction, Z states the coordinate of X axis, Z axis is worth; When increment process designing, express the increment size of X axis, Z axis with the X at the back of U, W or G91 instruction, Z; The character U that expresses increment among them, W cannot be used at dictating block of G80, G81, G82, G71, G72, G73, G76 is medium circularly, but the G90 in the program that can be used at defining finish machining outline, G91 is mode function, can cancel each other, g90 is default value. (2) coordinate fastens set G92 format: G92 X_ Z_ explains: X, Z: Nod what fasten origin to workpiece coordinate to have to the knife to the distance. After á Z â of executive G92 X dictates, systematic interior is opposite namely (á , â) has memory, build to make cutting tool nods coordinate currently the value is (á , â) coordinate is, the system controls cutting tool to press a program to undertake machining in this coordinate department. Carrying out this instruction to build a coordinate only is, cutting tool does not produce motion. G92 instruction dictates to be not mode, when implementing this directive, if cutting tool nods the á that fastens in workpiece coordinate fitly and â coordinate value to go up currently, already current drop is in cutting tool to be nodded to the knife locally, the coordinate department that builds right now is workpiece coordinate department namely, machine origin and program origin coincide. If cutting tool nods the á that does not fasten in workpiece coordinate and â coordinate value to go up currently, machine origin and program origin abhorrent, the product that treatment gives has an error or discard as useless, it is dangerous to appear even. When implementing this directive accordingly, current drop must be in cutting tool to go up to knife dot fitly namely on the á that workpiece coordinate fastens and â coordinate value, by on knowable should machine correctly, treatment origin and program origin must agree, origin of the treatment when reason process designing and program origin consideration are same point. When be being operated actually how to make 2.1 send, by finish to the knife when the operation. Normal Align=left> for example, the graph shows the set that coordinate fastens 1 times, when with workpiece left end panel is workpiece origin, answer to build workpiece coordinate to fasten by be issued to lower levels. Normal Align=left>G92 X180 Z254;normal Align=left> should be workpiece origin with workpiece right end panel, answer to build workpiece coordinate to fasten by be issued to lower levels. Normal Align=left>G92 X 180 Z44; Normal Align=left> is apparent, differ when á , â , or when changing cutting tool position, already current drop is not in cutting tool to be nodded to the knife locally, machine origin and program origin abhorrent. Because this is carrying out block G92 X before á Z â , must be opposite first knife. Normal Align=left>X, Z is worth is affirmatory, nod the coordinate value below workpiece coordinate department to the knife certainly namely. The general principle that its choose is: Normal Align=left>1, convenient maths is calculated and simplify process designing; Normal Align=left>2, easily to be opposite knife; Normal Align=left>3, facilitating treatment is checked; Normal Align=left>4, machining error that cause is small; Normal Align=left>5, do not collide with machine tool, workpiece happening; Normal Align=left>6, convenient disassemble workpiece; Normal Align=left>7, idle stroke does not want too long; Normal Align=left>(3) coordinate chooses G54~G59normal Align=left> explains: G54~G59 is the 6 coordinate department that the system books (the 2) that be like a graph, can choose according to needing random. Normal Align=left> is machined, its coordinate fastens, must set the origin that fastens for workpiece coordinate to tie medium coordinate cost in machine tool coordinate, the product that treatment gives has an error or discard as useless otherwise, it is dangerous to appear even. Normal Align=left> books workpiece coordinate 6 times this to fasten ties medium cost in machine tool coordinate (workpiece slanted at 0 o'clock buy is worth) input of usable MDI means, the system is remembered automatically. Normal Align=left> workpiece once make choice of, the statement cost when process designing of the absolute value in follow-up block all is the cost that ties origin relative to this workpiece coordinate. Normal Align=left>G54~G59 is mode function, can cancel each other, g54 is default value. Normal Align=left>(4) direct machine tool fastens process designing G53normal Align=left>G53 is process designing of department of machine tool coordinate, in the block that contains G53, the statement cost when absolute value process designing is the coordinate value in department of machine tool coordinate. Its dictate to be not mode. Normal Align=left>(5) diameter and format of radius means process designing: Normal Align=left> numerical control is turn coming back normally, dimension of its X axis can try to appoint with two kinds of means: Diametical means and radius means. G36 is default value, the machine tool leaves factory set commonly for diametical process designing. CNC Milling