Slotter part 2, with control details

I made a recent post describing my pneumatically powered slotter/broacher to fit a lathe or mill. Here it is if you did not catch it
https://www.homemadetools.net/forum/...h-driver-85709

This post ties up some loose ends and describes the control. Schematics are shown below and the Arduino programme code is shown in the intro comments of this video;

https://youtu.be/ddg-DAFAGu8

Here is the schematic for the control, which is fully explained in the video.

Attachment 39848

and some random pix of the Arduino and pre-Arduino boards, which show just how simple it really is.

Attachment 39849 Attachment 39850 Pre-Arduino control.

Attachment 39851 Attachment 39852 Arduino control.

Attachment 39853 Control board bolted to top of solenoid valve. Finger points to relay.