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Asse mb ly In st ruct i on s 0100 5- Pac ket E di tio n 1 2 /20 07 74 4.1. 2.3 Error: During Placement In ge neral, a mach ine accuracy o f a mi nimum of 80µm a t 4 sigma i s t he prerequisite f or the p lace- ment of th…

Assembly Instructions 01005-Packet

Edition 12/2007

– Causes at the components:

– Is the tape cover foil sticky?

– Do the components slip easily out of the component pockets when the tape cover foil is

stripped off?

– Have the components been stored in an area too dry? After opening the component tape

packaging, wait a few moments until a humidity exchange between the environment and

the component tape has taken place. (approx. 30min depending on the difference in humid-

ity).

4.1.2.2 Error: Face-Down Error, GF Out of Tolerance (Vision Error)

Wrong face-down error at resistors; Component shape measurements out of tolerance 4

– Causes at the machine:

When dealing with the 01005 resistors, we recommend to activate the face-down recognition in

the component shape description. This will set the default value for a grey zone limit of 127 for

flipped components. In order to determine the exact value, during pickup you can wait until a com-

ponent actually sits flipped at the nozzle and this is displayed as face-down in the vision errors.

Go to View => "Vision measurement context" to activate this vision dump and use the cursor to

define the grey tone for the component upper side. In addition, you need the grey tone for the com-

ponent lower side. You can determine the grey tone for example in the => "Measure component

and edit component shape data" => "Test component" menu. Use the pointer and move to the

component lower side. The mean value of both grey tones yields the threshold value for the face-

down recognition. Enter this threshold value at the station in the "Measure component and edit

component shape data" => "Manipulate allgorithm parameter" => "Face Down" menu. 4

A mean value around 80 for Rohm and Kamaya resistors proved to be useful. 4

If too many vision errors for component shape measurements out of tolerance are displayed, we

recommend to enter the real component measurements into the component shape. In order to do

so, pick up a component in the "Measure component and edit component shape data" => "Test

component" => menu and read out the measured value in component length and component

width in the "Dimension results" option. Repeat this action and compute the mean value. When

you are finished, enter the real component length and component width into the component shape

description. 4

– Causes at the components:

The dimension values for 01005 components are usually specified with a length of 0,4mm and a

width of 0,2mm at a tolerance of +- 20µm. In our experience the condenser dimensions are more

likely to lie in the lower tolerance limits. They are therefore a little smaller than the resistor dimen-

sions. This should be taken into account with the dimensions in the component shape descrip-

tion. 4

Assembly Instructions 01005-Packet

Edition 12/2007

4.1.2.3 Error: During Placement

In general, a machine accuracy of a minimum of 80µm at 4 sigma is the prerequisite for the place-

ment of the components. You can execute verification via the CM controller or the measuring de-

vice. 4

A further decisive influencing factor on the placement quality is the soldering paste and the pres-

sure. Refer to the SIPLACE 01005 process manual for further information and assistance. 4