TM3763.Vacuum check before dump.pdf - 第7页
SMT Software Engi neering Group IM Operati ons Y AMAHA MOTOR CO., L TD. MDOC-SOFT501 52 7/10 Fig.6 [Machine] - [Machine Data] - [Head] - [V acuum Level] screen Fig.7 [Parts ] - [Mount] screen
SMT Software Engineering Group
IM Operations YAMAHA MOTOR CO., LTD.
MDOC-SOFT50152
6/10
Following contents are displayed in the “Details” column.
Name Contents
Table Mount table number which error occurred.
H= “Head No.” displayed in error message.
C= “Parts No.” displayed in error message.
BefVac= “Vacuum levels before pick” displayed in error message.
AftVac= “Vacuum levels after pick” displayed in error message.
DmpVac= “Vacuum levels before dump” displayed in error message.
3.5 Calculation process of “vacuum check before dump”
Calculation process of “vacuum check before dump” is as follows.
3.5.1 Values used in “vacuum check before dump”
Following values are used in “vacuum check before dump”.
Table2 Values used in “vacuum check before dump”
Using value Explanation
Vacuum level
before pickup
Vacuum level of head recorded before pickup parts.
This value is recorded at the time of the first pickup after switching
board. However, in the case of “Pick start” is “bottom”, this value is not
recorded.
When this value is not recorded, [Machine] - [Machine Data] - [Head] -
[Vacuum Level] - [Low Level] value is used instead. (Fig.6)
Vacuum level
after pickup
Vacuum level of head recorded after pickup parts.
Vacuum level
before dump
Vacuum level of head recorded before dump parts.
Mount vacuum
(%)
Value of [Parts] - [Mount] - [Mount vacuum(%)] (Fig.7)。
SMT Software Engineering Group
IM Operations YAMAHA MOTOR CO., LTD.
MDOC-SOFT50152
7/10
Fig.6 [Machine] - [Machine Data] - [Head] - [Vacuum Level] screen
Fig.7 [Parts] - [Mount] screen
SMT Software Engineering Group
IM Operations YAMAHA MOTOR CO., LTD.
MDOC-SOFT50152
8/10
3.5.2 Calculation formula for “vacuum check before dump”
Example:
Vacuum level before pickup: 179
Vacuum level after pickup: 195
Vacuum level before dump: 180
Mount vacuum: 30%
“Error judgment vacuum level” = ( 100 - 30 ) / 100 * ( 195 - 179 ) + 179
= 190
In this case, machine determines that a part fell and displays error because ”Vacuum level
before dump”(180) is smaller than “Error judgment vacuum level”(190).
If “Vacuum level before dump” < “Error judgment vacuum level”
, machine judges that part
fell.
“Error judgment vacuum level” =
(100 - “Mount vacuum”) / 100 * (“Vacuum level after pickup” - “
Vacuum level before
pickup”) + “Vacuum level before pickup”
255
195 (Invalid vacuum level)
180 (Vacuum level before dump)
190 (Vacuum level after pickup)
179 (Vacuum level before pickup)
0
Vacuum level after pickup
Vacuum level before dump