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supporting mini mill head,,

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Lew_Merrick_PE:

--- Quote from: philf on March 02, 2014, 02:32:41 PM ---I used to use air cylinders to balance safety guards on test gear but simply used a relieving pressure regulator (just a cheapo, non-precision one) without a reservoir. It was so simple but so effective.

What is the idea of a reservoir? Is it because you're using non-relieving regulators?
--- End quote ---

No, I am using relieving regulators.  The ullage volume provides more consistent pressure control as force is applied to the cylinder.  This is very important when the material being pressed can become highly exothermic if the applied force/pressure exceeds some critical level (which is why I often use +/-0.5% regulators).  The last such device I made is used to press shaped charges for skin cutting on spacecraft.

If your application is not particularly critical for force/pressure, then you can reduce the requirements.  I live & work in a somewhat different universe.  My current project is a vacuum test chamber for NASA.  My previous project was a sidearm for the USMC.  Such work puts a different slant on criteria.

Stilldrillin:
Mike.
That's a nice idea! The door closer, mounted above the machine, connected to the head!  :clap: :clap:

The mill head needs to be asserting an upward force against the rack, at all times. This takes out any backlash when feeding downward.

If I remove the pinion from my mill, the head rises to the top of the column, all on it's own........ :thumbup:

David D

stirling lad:
I know this is in the wrong place but i don't know the right place to put it so if the mods want ot take it down.....

I found this yesterday lying beside my mill after i had been moving things around,, i checked the gib strips on the mill and all 3 have a gib visible at at each end so is it possible that my gibs are little critters like this and the middle one has fallen out somehow.???I have never seen it before in my life till last night it just appeared... :scratch: :scratch: does anyone recognise it ?



...Mike....

spuddevans:

--- Quote from: stirling lad on March 04, 2014, 12:00:11 PM ---does anyone recognise it ?

--- End quote ---

"I do!!"

It's the Gib strip for the mill's head depth stop collar thingy. ( you know the black squashed "U" shaped piece that, on my mill resides permanently at the bottom of the column )

Tim

Stilldrillin:
Well done Tim!  :thumbup:

I remember the same conundrum, around 5 years ago.........  :scratch:

David D

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