New project for 2025

New project for 2025

Home Forums I/C Engines New project for 2025

Viewing 22 posts - 1 through 22 (of 22 total)
  • Author
    Posts
  • #773552
    SteveP
    Participant
      @stevepye68246

       

      Screenshot 2024-12-30 132006

      One of my new projects for 2025.

      I’ve been working on this model for some months, two steps forward and one back, I seem to have new ideas after a nights sleep .

      Single cylinder 30 bore 20 stroke approximately.

      Overhead inclined valves.

      Pressure lubrication.

      Distributor with centrifugal advance.

      Water cooled.

      Made from bar stock.

      Proprietary oil seals.

      DP and MOD gears.

      Carburettor similar design to Amal.

      Steve p

      #773557
      Nigel Graham 2
      Participant
        @nigelgraham2

        Interesting! Keep us posted with progress!

        #773565
        JasonB
        Moderator
          @jasonb

          Yes please post your progress both with the 3D model as well as the metal munching.

          #773582
          Diogenes
          Participant
            @diogenes

            Yes indeed, will also be watching with interest..

            #773665
            bernard towers
            Participant
              @bernardtowers37738

              Be very interested how you get on with the centrifugal advance especially at that size and with an engine that oversquare

              #825336
              SteveP
              Participant
                @stevepye68246

                Slowly turning blocks of Aluminium in to engine parts ,that I hope, resemble my CAD models.

                Steve20251118_14483320251118_18320020251119_155445

                Steve

                #825355
                JasonB
                Moderator
                  @jasonb

                  Good to see progress underway.

                  #825435
                  SteveP
                  Participant
                    @stevepye68246

                    20251120_143636Gear cutters for crossed helical distributor drive.20251120_15401120251120_15253020251120_153952Individual Carburettor parts and assembled Carburettor.

                    Steve

                    #825457
                    Roger B
                    Participant
                      @rogerb61624

                      Looks an interesting project. Excellent work on the carb 🙂

                      #825458
                      renardiere7
                      Participant
                        @renardiere7

                        Wow! Those are beautiful parts.

                        #827800
                        SteveP
                        Participant
                          @stevepye68246

                          20251205_12224720251205_12221920251205_122234Head  nearly finished , just the spark plug hole and head stud holes to complete.

                          Still a number of individual parts to make, for a finished head assembly.

                          Steve

                          #827806
                          JasonB
                          Moderator
                            @jasonb

                            Looking good, can you remind me what machine you are using?

                            #827966
                            SteveP
                            Participant
                              @stevepye68246

                              Thank you Roger B, renardiere7 and Jason for your positive comments.

                              Jason .

                              I have a KX3 CNC clone which I bought from SPG in Leicester, it stood idle for a number of years for various reasons and when I actually got around to using it, I was really disappointed. It took me at least 12 months to get it working cutting metal, the more I use it, the more problems I find, I think another strip down is needed.

                              Other than the outside profile of the cylinder head all other features are machined on a Myford VME milling machine and Super 7 lathe.

                              I use Alibre Workshop for producing cutter paths, I’m not sure it was designed for cutting metal. I’m fairly satisfied with the results , I learn something new ever time I use the Meshcam CAM software and Alibre Atom3D CAD, which I love using.

                              The cylinder block is next on my list for my CNC machine, this part needs all 4 sides machining separately, all sides need to align. I’ve found a way of achieving this in Meshcam which I couldn’t do when I first started using the software.

                              Anyone else using Alibre Workshop to machine parts?

                              Steve P

                               

                               

                               

                               

                              #827968
                              JasonB
                              Moderator
                                @jasonb

                                That’s a shame about the machine not working as it should. Mine was a customer return and once I found what they had damaged was able to put it just about right and the machine has been fine ever since. I do need to revisit again as I have a very small amount of Backlash in Z and that is where the damage was.

                                I did have a quick trial of the Meshcam when Alibre first offered it but found it very limited compared with F360 (free version) which I had already been using for CAM. As you say it seems more aimed at the ganty router type user doing craft projects rather than engineering.

                                F360 is quite happy working from all sides, even angled ones as you just select that surface as your top and then a datum for X&Y

                                #827972
                                John Hinkley
                                Participant
                                  @johnhinkley26699

                                  I was lucky enough to win a Shapeoko gantry style router some years ago as a prize in a competition sponsored by Alibre, together with a copy of Meshcam. In an email exchange with Alibre in the USA, I informed them that I was expecting to use the machine with aluminium.  They responded that, in their opinion, Meshcam  wasn’t “robust” (their word) enough for aluminium and was more suitable for use with wood and suchlike materials.

                                  I used Fusion 360 (non-commercial free software) to produce the g-code, having first designed the parts with Alibre Atom 3D.

                                  (By the by, I don’t save any projects to Fusion’s cloud, preferring to use the “save on my computer” option, thus avoiding the ten file restriction.  This is an alternative to Jason’s solution expressed in another thread.)

                                  John

                                   

                                  #827976
                                  SteveP
                                  Participant
                                    @stevepye68246

                                    I have a similar problem with play in the Z axis and also the tool moves slightly left and right as the head travels up and down matching the pitch of the ball screw. I’ve also discovered the oil feed to multiple banjos is for show only, that made me smile!

                                    Modifications I’m thinking of doing , is to replace the gas the struts that counter balance the weight of the head with a weight hung at rear of the machine connected to a bicycle chain running over the top of the machine and connected to the head. Drill oil ways. Cure the left to right movement of the head.

                                    Another large problem is spindle speed, I have very little control over what rpm it’s doing another thing that makes me laugh when I hear it speed up and slow down when it machining, an VFD motor might on its way.

                                    I was luck enough to pick a number of small Er collet chucks up from Arc when they were closing down, plan is to make a preset tooling system for the machine.

                                    All this after my engine runs but I keep thinking of design changes (debatable improvements, more laughing), that’s the enjoyment of model engineering.

                                    One day I will fix the design.

                                    Steve

                                     

                                    #827983
                                    SteveP
                                    Participant
                                      @stevepye68246

                                      Thanks John.

                                      I may have to consider changing to Fusion 360 or another CAM software in the future. Meshcam can be ,is crude, it lacks fine tool controls but it has produced everything I’ve designed in CAD so far. The first cutter paths Meshcam produced were for press tools ,to produce body panels for my Alfa Romeo which I’ve owned from new (last on the road in 2008) the tools were made of oak so the cutter path problems weren’t apparent.

                                       

                                      Steve

                                       

                                       

                                      #828538
                                      SteveP
                                      Participant
                                        @stevepye68246

                                         

                                        Rocker pedestals finished and fitted.

                                        20251212_194821

                                        Fledgling Valve Rocker.20251212_195558

                                        SteveP

                                        #844490
                                        SteveP
                                        Participant
                                          @stevepye68246

                                          Working at a snails pace a few more parts have been completed.

                                          Sump, oil pump gears and drive gear ,inlet and exhaust cams with drive gears.20260414_21315320260414_21303720260413_21041420260413_20374820260311_15335420260414_213537

                                          #844493
                                          SteveP
                                          Participant
                                            @stevepye68246

                                            20260414_212336The main bearings will be bored on assembly of the sump and block.

                                            Steve

                                            #844527
                                            JasonB
                                            Moderator
                                              @jasonb

                                              All looking good.

                                              #845984
                                              SteveP
                                              Participant
                                                @stevepye68246

                                                20260427_212143

                                                20260427_212157

                                                Cam cover completed,  another part ticked off.

                                                Steve

                                              Viewing 22 posts - 1 through 22 (of 22 total)
                                              • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                                              Latest Replies

                                              Home Forums I/C Engines Topics

                                              Viewing 25 topics - 1 through 25 (of 25 total)
                                              Viewing 25 topics - 1 through 25 (of 25 total)

                                              View full reply list.