I have started to make a Pick and Place machine that will be able to do SMD mounting of electronic parts.

It will also be able to do 3D printing.

At the moment this is just a memory dump so that i can keep all information in one place. Over time i will add bits and pieces to make the thing complete.

pick and place main

First the list of sources for all the mechanical parts.
M3 x 70    bolt  12.35Euro for 16 needed for Nema17 motor mount for X axis.
http://www.metaalreus.nl/product_info.php?products_id=24418&osCsid=4e3dd27bfc4d8477528acebff53f433a

Clamp on shaft couplers: You need one to couple the suction head to the rotation motor.

pickandplacecouplingpickandplaceboltpickandplacetensionpickandplaceflange

The NEMA17 has a 5mm motor shaft and I used 3/8th the other to fit to the vacuum pipe. (see drawing later on)

One more for spindle to motor.  5mm motor and the spindle I got was 3/8th a so called 10 turn 2 start one (partnr ACME 3/8-10 (2 Start))

I added a .860″ (21.8mm) machined cutdown flange with (2) .173″ (4.4mm) dia holes. This is a anti backlash nut to prevent play when moving the pick and place head back and forward. US$17.50 plus US$2.00 for the flange. The clamp on shaft couplings cost US$13.75 or US$14.75 depending on size.
All these I got from  http://www.dumpstercnc.com/
As an alternative you can use
http://buildyourcnc.com/CNCMachineMechanicalParts.aspx

 

Nema17 stepper motor i got from ebay at US$6.89 which is OK but shipping is expensive so watch out. http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180764835312
I also got the stepper driver boards from ebay.  At US$11.00 including a small heatsink is good price shipping is only US$2.00
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=270824453170
For fixing some of the wood i used cross dowels which i bought locally  but you can get eg here
http://www.woodcraft.com/Product/2001045/860/Cross-Dowels.aspx
The bearings for guiding the timing belts you can get here. Originally i wanted to use 6mm diameter
Ones as below but finally ended up with 4mm ones using 3 together.
http://www.paoparts.com/fr/roulement-a-billes/66-624zz.html

pickandplaceikeapickandplacevgroovepickandplacebearing
I used V groove bearings bought locally. They are ones used for pulley guidance.
Mine were about 4.50Euro each. These ride on the rails. They have 6mm shaft.
http://buildyourcnc.com/bearingsproducts.aspx
You can buy for double the price above. http://buildyourcnc.com/Documents/r2zzbybuildyourcnc.pdf

You also need a solenoid valve in order to switch on and off the vacuum for picking up and releasing the part.
I used a 12V coil for actuation. The last link is the circuit i have used to actuale the solenoid using a TIP102.
http://shop.pneumatiek.nl/pneumatiek/univer/ventielen/elektrisch-bediend/3-2-ventiel/3-2-w-u1-electr-veerr-m5-nc-15mm-m/
https://shop.pneumatiek.nl/default.asp?pageid=95&artdetail=DA-0050&webgroupfilter=374
http://www.arduino.cc/playground/uploads/Learning/solenoid_driver.pdf

This link will help you get the wiring right. The colours matched my NMEA17
http://www.kysanelectronics.com/Products/datasheet_display.php?recordID=3575

This pulleys and timing belt came from the link below at 14.99GBP and 9.99GBP respectively.
http://redwizard3d.com/products

 

pickandplacetimingpulleypickandplacenozzle

pickandplacesmdholderpickandplacevacuumpump

pickandplacedrawingpickandplacedrawing2pickandplacetimingbelt

Pick and Place videos

Two small videos of what the mechanical construction looks like: video1 and video2

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