Lubrication
In addition to changing out the lube pump for one that the Acorn Controller can operate, I had some difficult line routing to do on the new ball screws.
The amount of room around the new XY Yoke was limited and some concessions had to be made. Passing the two lines down the opening where the yoke is bolted was kinda fun. The new yoke occupied most of the opening through the saddle opening.
A hole was drilled through the yoke that coincided with one of the now unused dowel pin holes in the saddle. To keep the swarf shields from touching the lines and damaging them, the stop for the sliding shield was relocated more towards the operator. The 10-32 button head Allen bolt sits in a countersunk hole in the saddle and the yoke bolts down over the top.
The hole to the immediate right of the Allen bolt is for the Y Axis lube line. This was the original location of the shield stop and was enlarged to 1/2". Test example of the line routing.
The lube line to the X Axis ball screw was formed from 4mm copper line. I laser cut a cardboard template of the underside of the table to check clearances while building. I filled the line with Bismuth to allow bending the tight radius and then boiled the line in water to get the bismuth out. The Y Axis ball screw line was 4mm nylon with a spiral metal covering to protect it from vibration abrasion. Two of the Allen bolts used to hold down the yoke had to be changed to button head Allen bolts to provide adequate clearance. All things considered it is an extremely tight fit under the saddle. I was lucky in my engineering!!
These views show the X & Y ball screw and right side Y axis lubrication lines installed on the left. Right view is the manifold with all lines connected except the feed line from the pump.
The completed plumbing of the lube system. To ease part of the job a flexible line was used to connect the pump to the manifold block. The lines to the knee ways were replaced with 4mm copper sourced from Super Crown on eBay. The metric fittings were a bit of a nuisance, but I sourced them to keep everything plumbed in the same type.