Part 2. Removing lathe cross slide friction with linear ball rails.

[@SquareRootOfNegativeOne]

brilliant!! can't wait to see how you like it

[@MotoChassisByTonyFoale]

Me too. It may be back working as a lathe by the end of today. Part 3 will be out on Sunday evening.

[@noone18]

Hi Tony, great idea. I like to see the rigidity in the next video how parting would go. Thanks for this clear video.

[@MotoChassisByTonyFoale]

Parting will probably be the toughest test. Too late to back track now.

[@noone18]

@@MotoChassisByTonyFoale Indeed is parting the game changer but so is your idea. Is metal chips bearing shielding sufficient enough? And you can always reverse to original settings and parts if needed. Such R&D is only possible in practise because of lacking (chinese) datasheets for calculations.

[@MotoChassisByTonyFoale]

@@noone18 I am very particular about shielding, it will be OK. No, I can't reverse it I am past the point of no return. Do not worry I am used to it.

[@milanercegovic8413]

Hi Tony, nicely done and well explained, good design for grease nipple, set dial indicator on spindle and swing 180 degrees to check front rail when bolted down, waiting for next episode.

[@MotoChassisByTonyFoale]

The swing was closer to 270 degrees, otherwise as you say.

[@bobawatsit]

Be very interested in how you propose to grind cam lobes. I propose to do the same, some of my ideas maybe useful

[@MotoChassisByTonyFoale]

Have you seen Part 1 of the video series? That shows the grinding head mounting. Also an earlier video shows the electronic control, they are all on this playlist kzbin.info/aero/PLyn2snGjYlHw_e4LomNphh8KleeqPiqpz . I have written some cam synthesis software which outputs a set of cross slide positions for each position of the lathe spindle. Those numbers are fed into the lathe controller to move the cross slide. Some future videos will show it in action, success or failure. Your ideas are welcome.

[@bobawatsit]

your biggest battle will be designing a cam lobe profile. I am not going to belittle your efforts, BUT, unless you understand lobe lift acceleration and deceleration, velocity and of course lifts for a particular valve actuation system, either sever damage or cam performance will be disappointing. I do not know what type of engine you are thinking of making a cam lobe for, but my suggestion is to COPY a profile from a reputable camshaft supplier. Quite easy to do, and done universally in the trade. I am more than happy to give you more advise. robbie nz @@MotoChassisByTonyFoale

[@สมพงษ์ศรีสุรักษ์]

Waiting to watch the next episode.

[@MotoChassisByTonyFoale]

It should be ready next Sunday evening.

[@KW-ei3pi]

Very nice work Tony. I'm hoping that you will do the same modification and improvements to the milling machine saddle. Thanks. Regards.

[@MotoChassisByTonyFoale]

I have no plans to attack my mill but I am planning a surface grinder which will have X&Y movements like a mill, but also on linear rails. Keep watching.

[@asciidv]

When you are bolting the linear bearings to the cross slide you are relying on the 4 screws to provide alignment as the oversize pockets into which the bearings locate cannot provide a location feature. Would it not have been better to machine the width of the pocket accurately to provide a location feature rather than just relying on the 4 bolt down screws? Of course the proof of the pudding is in the end result and you have demonstrated that your alignment relying on the 4 screws alone is good!

[@MotoChassisByTonyFoale]

Excellent question. The rails themselves are factory drilled with 4.5 mm holes and specify 4 mm bolts. I followed that for the trucks. The clearance in the holes does allow for a final alignment on assembly. Also the best alignment for the trucks is the rails themselves. Alignment will be shown in the next one or two videos.

[@Blue.4t2]

⭐🙂👍

[@mudnducs]

Those linear bearings will take the vertical load of a metal lathe, long term?

[@MotoChassisByTonyFoale]

I'm 80 yo. I do not consider long term. Linear bearings are now common on hard worked CNC machines.