The PCB is Green in V6b to be different as in V6, it is with SMT leds. There are as well other important improvements in optimisation of Torque which is Crucial for dispensing quality with respect to amount of solder paste in Syringe. More paste you have in Syringe more force is needed to press on Volume in syringe and to push paste out trough the tinny needle. Paste behaves in syringe completely different as a fluid !! REMEMBER THIS!
https://www.youtube.com/watch?v=mYSvZS7xBes

Users of V4, V5, V6 of my Dispenser have confirmed quality of dispensing with my solder paste dispenser with use of liquids, oil and reliability of Dispensing on numerous projects. In addition, this version V6 has upgraded usage of power of stepper motor (see video on my web page) and as well less heat from electronics and motor due to current optimisation to the motor (when no command is given to the motor- no current is used/needed).

Key Functions of Dispenser V6b:

• 5V USB standard cable power supply,
• Dispensing control with single finger on mini Joystick located on Dispenser PCB at Syringe neck,
• Joystick to control & turn stepper motor (shaft left or right) and move piston in direction chosen, with auto reverse function,
• Blue LED indicates motor rotation in any direction,
• Stepper motor has auto reverse movement (adjustable) to prevent continues flow of paste through the needle (oozing control),
• Auto reverse can be user adjusted with trimmer on PCB,
• Auto reverse can be set to “0” -no auto reverse, (for liquids)
• Stepper speed is additionally controlled with joystick: 5 speed are possible and 5 Blue LEDs indicate the set speed.
• Auto reverse is in effect after each dispense drop to minimise oozing.
• Very powerful stepper motor with full metal gears & tremendous pressure is used for SMD SMT solder paste compressing in syringe to flow through the needle and drop to PCB.
• 3D printed stl files for your own print of dispenser enclosure

Power Supply needed is 5V DC – 0.5-1.0A USB mini connector. (You can use STANDARD USB cable with phone charger or computer USB port…or similar).

For more details see description, photos, videos and blog at http://wordpress.mencinger.biz/ or read more from development at: **http://www.applecture.com/electronic-dispenser-for-manual-solder-paste-application-to-pcb-for-reflow-soldering-or-hot-air-soldering-technics-53341

Visit my You Tube channel at;
https://www.youtube.com/channel/UCbk02zm_kFNXvGvHPFDOEZw 
https://www.youtube.com/watch?v=Qtzdjzwxfkc

Please use quality solder paste with valid pot-life from date of manufacture. Syringes stored in fridge at low temperature shall be warmed with hot air/ shrink tube gun / hair dryer / hot water…. to room temperature for better viscosity of solder paste for use with this dispenser. If you have old solder paste mix it well with flux and you can use it for testing on some old PCB.

Package includes:

V6a packing – 1pc Plastic packing Box – 1pc Dispenser PCB with Stepper Motor and build-in parts-tested as on photo (green PCB), metal shaft and piston, – 2pcs Industrial Syringe 10ml (mounted) with Lour LOCK needle output neck & one Filling Syinge,  1pc 2 way Luvre Lock Valve (blue) – 2pc Stop Plug-Cap (black) – 9 pcs plastic needles (green, blue orange) and some more needles- see picture bellow!