View source for PCB-assembly

HSGR PCB assembly tools

== Assembly PC ==

Our PC runs kubuntu 23.04. It has installed https://gitlab.com/hsgr/lab/ec-placer-camera-viewer. In order to run it:

# workon ec-palcer
# cd Desktop/ec-placer-camera-viewer
# python crosier.py 0 2

In the PC is connected a label printer (Direct Thermal Printing). In order to use it:

# cd Desktop
# workon label-printer
# python labels.py Test

More details for python script: https://gitlab.com/librespacefoundation/qubik/qubik-org/-/snippets/2181003

Credentials:
# user: hsgr
# key: hsgr-lab

== Stencil Printer ==

Our stencil printer is based on https://dengler-mechatronik.de/?p=560.
In the the above photo you check the modifications:

[[File:Stencil-printer.png|thumb|center|800x420px|alt=|Stencil Printer]]

Other Tools:
# squeegee, use it softly and slowly as is referred in to solder paste datasheet
# small plastic spatula or stick, to stir the solder paste
# isopropyl alcohol and paper towel to clean everything
# M3 allen key wrench, to install the stencil
# Microscope Camera with USB interface, use it with VLC in order to check the alignment of PCB and stencil

== Manual Pick and Place ==

Our Pick and Place is https://www.eurocircuits.com/blog/ec-placer/ with 2 cameras and a in-house software: https://gitlab.com/hsgr/lab/ec-placer-camera-viewer. The set-up needs 2 monitors:
# 1st for Pick and Place cameras
# 2nd for interactive BOM, https://github.com/openscopeproject/InteractiveHtmlBom

[[File:Pnp.png|thumb|center|800x420px|alt=|Pick and Place]]

Other Tools:
# PCB vice: https://gitlab.com/thanos.husk/tiny-vice
# all the grounding - ESD connections, Pick and Place and user
# SMD feeders: https://www.thingiverse.com/thing:2414955/files

Maintenance:
# Check page 41 for YZ block, https://www.eurocircuits.com/wp-content/uploads/ec2015/ecImage/document/v20_eC-009-999-R00ManualPnPUserManual_EN_en.pdf
# The same mechanism exists at XY block

== Reflow Oven ==

The model of reflow oven is puhui T-962. There are some improvements base on https://github.com/UnifiedEngineering/T-962-improvements/wiki:
# Flashing the LPC21xx controller
# Dallas 18B20 for cold junction mod
# Kapton tape was added for better thermal inslulation
# Improve grounding
# Use Custom 2 profile

[[File:Reflow-and-cleaner.png|thumb|center|800x420px|alt=|Reflow Oven and Ultra sonic Cleaner]]

Other Tools:
# Use M4 nuts to place PCB in to oven base

Maintenance:
# Calibration process: https://github.com/UnifiedEngineering/T-962-improvements/wiki/calibration

== Ultrasonic Cleaner ==

It is a 2.0L ultrasonic cleaner. The model is JP-010S.
For flight models (space) it is not recommended to clean it with this.
Use isopropyl alcohol to clean PCBs.

[[Category:Documentation]]