11
Member Videos / OKMO Microcosm M91 Model Hit & Miss Engine
« Last post by Jim Dobson on June 13, 2025, 12:29:36 AM »Had a run of my OKMO Microcosm M91 Model Hit & Miss Engine
Recent Posts
12
Software Tools / Re: Playing with Blender For Artists (Bforartists) - Easier way to learn Blender?
« Last post by sorveltaja on June 12, 2025, 08:49:19 PM »Yeah, scotch yoke seems to be easy one to animate/simulate properly, as the location of A (piston/conrod connection point in previous image), can be set to copy B's (yoke) location, by limiting its following behavior to consist only B's Z-axis movement.
To change gears - Although Blender's simulation/physics engine (Bullet) has some major issues with glitches, it can still be used for spotting/avoiding the same (tedious and probably takes too much effort to figure out what seemingly random errors are).
Nevertheless, there may be moments, when simulation runs as expected. An example, where vehicle drives around in circles, having its speed measured:
To change gears - Although Blender's simulation/physics engine (Bullet) has some major issues with glitches, it can still be used for spotting/avoiding the same (tedious and probably takes too much effort to figure out what seemingly random errors are).
Nevertheless, there may be moments, when simulation runs as expected. An example, where vehicle drives around in circles, having its speed measured:
13
Tools / Re: What's inside of a Harbor Freight 220V Spot Welder?
« Last post by vtsteam on June 12, 2025, 03:05:35 PM »The front arms. Upper moveable arm removed. Sits in cast aluminum retainer, attaches to brass contact shell:
[ You are not allowed to view attachments ]
The handle pivot showing straight knurl for "press" fit (doesn't work well)
[ You are not allowed to view attachments ]
Upper arm contact (brass right) lower arm contact (copper center) and pivot
[ You are not allowed to view attachments ]
Upper and lower arm contacts (front view)
[ You are not allowed to view attachments ]
[ You are not allowed to view attachments ]
Lower contact, showing insulation at bottom
[ You are not allowed to view attachments ]
[ You are not allowed to view attachments ]
The handle pivot showing straight knurl for "press" fit (doesn't work well)
[ You are not allowed to view attachments ]
Upper arm contact (brass right) lower arm contact (copper center) and pivot
[ You are not allowed to view attachments ]
Upper and lower arm contacts (front view)
[ You are not allowed to view attachments ]
[ You are not allowed to view attachments ]
Lower contact, showing insulation at bottom
[ You are not allowed to view attachments ]
14
Tools / Re: What's inside of a Harbor Freight 220V Spot Welder?
« Last post by vtsteam on June 12, 2025, 02:51:46 PM »End cap removed:
[ You are not allowed to view attachments ]
The cap and back end of transformer windings
[ You are not allowed to view attachments ]
The fixed handle and trigger wire running down channel to the switch:
[ You are not allowed to view attachments ]
Switch with ring of paper insulator
[ You are not allowed to view attachments ]
Switch wiring
[ You are not allowed to view attachments ]
Switch construction
[ You are not allowed to view attachments ]
Switch contacts
[ You are not allowed to view attachments ]
[ You are not allowed to view attachments ]
The cap and back end of transformer windings
[ You are not allowed to view attachments ]
The fixed handle and trigger wire running down channel to the switch:
[ You are not allowed to view attachments ]
Switch with ring of paper insulator
[ You are not allowed to view attachments ]
Switch wiring
[ You are not allowed to view attachments ]
Switch construction
[ You are not allowed to view attachments ]
Switch contacts
[ You are not allowed to view attachments ]
15
Tools / What's inside of a Harbor Freight 220V Spot Welder?
« Last post by vtsteam on June 12, 2025, 02:31:21 PM »What's inside a Harbor Freight 240 volt spot welder? Well the switch on mine was starting to act flakey, so I decided to find out.....
[ You are not allowed to view attachments ]
End cap left, fixed handle lying on top of main body with switch wires and switch, moveable handle above that. Handle pin partly removed at front.
[ You are not allowed to view attachments ]
End cap left, fixed handle lying on top of main body with switch wires and switch, moveable handle above that. Handle pin partly removed at front.
16
Project Logs / Re: Building Bernard Tekippe`s Regulator Clock
« Last post by smiffy on June 11, 2025, 04:06:35 AM »Looking good a very interesting clock , it will be good to see how it performs . Mike
17
Project Logs / Re: Building Bernard Tekippe`s Regulator Clock
« Last post by raynerd on June 10, 2025, 04:01:49 PM »I haven’t updated for a while but managed to get this running a bit better since the last video:
i=L3C9E2u0w4TBSGZw
18
Software Tools / Re: Playing with Blender For Artists (Bforartists) - Easier way to learn Blender?
« Last post by vtsteam on June 09, 2025, 10:02:19 PM »The conrod is always vertical in a scotch yoke, but at a varying angle to the piston in a crankpin connection. Except at TDC and BDC. So the vertical distance is shorter in between.
19
Software Tools / Re: Playing with Blender For Artists (Bforartists) - Easier way to learn Blender?
« Last post by sorveltaja on June 09, 2025, 06:40:43 PM »That sure looks strange. So I thought that how about trying to replicate it in Blender, and the resulting curves look pretty similar.
Blue curves are motion paths, which were used to form curves on the top:
[ You are not allowed to view attachments ]
Blue curves are motion paths, which were used to form curves on the top:
[ You are not allowed to view attachments ]
20