5. Electronics production¶

In this week we had to manufacture our own ISP programmer that we will use to program our controllers, and also to get to know more about CNC milling and monofab Srm-20.

Milling.¶

First I started by downloading these two PNG files from this tutorial to be able to use them to exract the correct file that with .rml extension to be able to mill the ISP programer PCB.

So I used Fabmodules to get my output files.

The step were:

Select the input format to be read – PNG in our case.
Upload the PNG image.
Select the output format – because we are using a Rolland milling machine we select Roland mill (.rml) as our option.
Select the process to be done – Here we declare whether we are processing the image of the traces or the outline of the PCB. This step is done twice.
PCB Traces (1/64)
PCB Outline (1/32)
Enter the settings for the output format: Machine: SRM-20.
X0, Y0, Z0 = 0 mm.
click on calculate

Then I set up the Setting Up the Ronald srm_20 milling machine. and mounted the FR1 plate to be milled.

then set up the Vpanel for SRM-20 software and setting up home position for X,Y,Z cordinates.

for Z Zeoring: I lowered the milling bit enough to almost touch the board. then I un-screw the milling bit bringing its tip close to the surface to touch it slightly and then tightened it back, and set the zero Z value. This step is done to ensure that the milling bit will be able to touch the surface enough to start engraving,