Recent content by FIXIT

testing of model boilers

testing of model boilers

Testing of Model Boilers

Testing of Model Boilers

Looking good ! Ive built a few small engines from the scrap bin and sort of build them "as i go" and they seem to come out OK. What i would like to ask is what drafting package did you use. as I'm thinking that i like to 'have a go ' at designing one first' and not on the back of an envelope...

Wow !!!!!!

Great little engine just for me could one of you USA chaps tell me how big is the penny shown as Ive got no idea not having not been to see micky mouse yet!!

To try and answer your origanal question fuel supply. the only carburetter/ turbo engine i have come across is the MG metro and that fuel system uses a high flow/pressure fuel pump with a separate variable pressure regulator that holds the fuel pressure 4 PSI above boost pressure and the SU...

I was assuming the reduction was by timing belt . you are right a meshed gear wouldn't be any good in a cnc system. And you should avoid oldham couplings with rubber inserts as that can leave some play in the system alltho a lot of people get away with them on light loaded drives Steve

A gear reduction would give more torque as well as better resolution for the same size motor. although top speed would be cut but less chance of loosing steps on a open loop system

That's clever i think i will have a go at that!

Bin there!!! just a tip from another newbie to cnc if you are using Mach3 you can do a trial run in the toolpath screen and it has a panel marked absolute limits which tells you the max movements/limits the machine is going(or try) to go to Steve

Just a thought but the machinery's hand book in this country retails for over 100 pounds which is very expensive for something you might not understand in the early stages. ( i have one !) Steve

My two pennies worth i to bought a bottle from chronos 2 years ago and its still 3/4 full and as suggested i use it from a nail polish bottle with the built in brush, works well!

Thanks for all the replies chaps i will take all the advice/warnings seriously. I sharpend a cutter to Bogs drawing and with great success on a 1" brass block and managed to square it to 1/2 thou over the length but it was very slightly concave on the width as Bogs had warned so i will look at...