====== Testing parts! ======

When making custom parts, getting the bottom vision test perfect before assembly will save you a lot of grief!
Lets test our Accelerometer (14-LGA) that we defined.

===== Pick up the part =====

First we go to the **Tape Feeder** table and type in **2** (edit) and **2** (change data). Then down-arrow to get to the part we want to test
Make a note of the part number (in this case its **119**)

{{:mdcpickandplace:testing:feederedit.png|}}

Now press **F8** to get into training mode

{{:mdcpickandplace:testing:feedertrain.png|}}

We want to pick up the part so we have to get into **Nozzle** mode. Press **9** (not F9, just the number 9)

{{:mdcpickandplace:testing:nozlmode.png|}}

Now we will pick up the part - you have to have the **stroke** already set properly for this by the way. Check the instructions for doing that!

Press **R** to bring the nozzle down to the part. Then press **V** to turn on the **v**acuum. You should hear the vacuum kick in. Now press **R** again to bring the part up. Check the nozzle to verify you've got the part picked up!

===== Begin the test =====

Now we're ready to test. Press **Shift P** to bring up the testing window

**NOTE** if you are using QFPs that are large enough to require **LunaVis 27** not **26** use just **P** not **Shift P**. If you are using parts that will be defined with the 'flying vision' (not bottom vision) press **F**

{{:mdcpickandplace:testing:shiftp.png|}}

You can now enter in the part# you want to test. Remember that this one is **119**. There are two kinds of tests, one is continuous and one stops after a few tries. To do the continuous one type in **119,0,** (note the comma at the end). To do the one-shot test, type in **119,0** (note no comma). With the continuous test, you can mess with the light levels but in the end you should make sure it works with the one-shot

{{:mdcpickandplace:testing.png|}}



===== Performing the closed loop vision test =====

The machine should now do a 'closed loop' multiple test to get the part centered:

{{:mdcpickandplace:test0.png|}}

{{:mdcpickandplace:test1.png|}}

{{:mdcpickandplace:test2.png|}}

{{:mdcpickandplace:test3.png|}}

===== Fixing problems =====

If you aren't getting anything from the machine vision, you can try a few things. First, press **F3** to get into the **Parts Definition** table. (You may need to press **Escape** or **Shift-P** or press any **Stop** button before F3 - verify!)

You can try changing the vision type. For example, if you're using **LV 26** try **126** or **226** - LV 126 makes the lighting a little darker, LV 226 makes the lighting a little brighter. 
 
Once you've changed around the part definition, you can press **Return** on the new values (to save them into the datasheet) and **Escape** to get back to the vision training mode. Then do the **Shift-P** again with the part #

===== Returning the part =====

We're not 100% sure this is the best way to finish up but once you've got your vision tested you'll still have this part hanging out in the nozzle. 

Once you're happy with the vision (or so annoyed you have to stop). Press **Escape**, you'll get a Stroke Change? window. Press **NO**

{{:mdcpickandplace:testing:nostrokechange.png|}}

This will bring you back to the part feeder spreadsheet. **But** the location is wrong. Now **don't** press return, immediately press **Escape**. This will make sure the location isn't saved 

{{:mdcpickandplace:testing:posttestesc.png|}}

Once its reverted to the old values, press **F8**

{{:mdcpickandplace:testing:posttestreplace.png|}}

You'll see the empty pocket. To replace the part, press **9** (nozzle mode) **R** (drop nozzle) **V** (turn off vacuum) **R** (raise nozzle)
Press Escape and make sure you don't save the stroke or location or anything.