Gallery, Projects and General > Project Logs
Oh Blimey I bought a CNC Lathe !!!!
awemawson:
At the request of PeteW I'm posting some details of the ISOMA centring microscope that I'm using to help me set the correct tool heights on this lathe.
I've been assured that setting height using VDI30 tools is easy, as the top surface of tools is in alignment with the tip height, and the upper surface of the tool holder is on centre line. However in my experience neither of these theories is correct by quite a distance :bugeye:
Now on a manual lathe I'm antediluvian, and use the 'trap a 6" ruler 'twixt tip and work and set to vertical' - works for me, but in this machine firstly it's all inside a sealed enclosure, secondly the X axis is slanting at a steep angle, and thirdly the tool is held upside down as it is on the far side of the work from the operator :scratch:
Hence experimenting with the ISOMA, which I've had for decades but have rarely used.
I'm afraid the 'through 'scope' shots are pretty dim - but that's the way it is :clap:
awemawson:
I've been experimenting with increasing the illumination - currently it's a 15 watt 6v 210 lumen microscope bulb and as you see, rather dim. I ordered a Chinese torch claiming to use a 2200 lumen CREE LED - this would not only have had a much brighter light, being battery powered it would avoid me having to unplug and reel in the cable every time the door has to be shut to make an adjustment.
However it would seem no brighter than the original lamp, so I have to assume that Chinese lumens are approximately 1/10 of standard lumens :bang:
Bit of a give away that it claims 12 watts, whereas I measure a best case of 4.9 :scratch:
Manxmodder:
Nice scope,Andrew.
Seems the torch seller doesn't know their watts from their wotsits,or their lumens from their lanterns :palm:
Maybe a better description would've been 'as bright as one chinese lantern' :lol:
.....OZ.
Pete W.:
Hi there, Andrew,
My lovely but shy assistant wonders what you're doing in the workshop - shouldn't you be outside lambing?
I take it that your third and fourth photos are using the original Isoma lamp, am I right?
I suggest that you do a check with the 'scope off the lathe to see if the image is erect or inverted. Draw a target on a piece of paper and look at that, perhaps. Conventional compound microscopes give an inverted image but the Isoma has a prism to send the image to the screen - it could be erect in one axis (e.g. conventional X) and inverted in the other (conventional Y)! You need to know before you can move forward.
If you use the LED torch instead of the original bulb, will the LED light source be in the same place as the Isoma bulb was?
awemawson:
Pete, we have a theoretical two to three weeks before lambing, but you never can be sure so we have an 'emergency bay' set up in the stable just in case.
Yes the dim pictures are using the "13347W" 6 volt 15 watt ba15 based T6 shaped bulb. Not yet tried the led - I'd intended to dismantle the torch and just use the cree LED so that I could get it in the same plane as the bulbs filament, but as it's no brighter there seems little point.
Seeing which way up is simple - I just rested a thin feeler gauge on the tip - then you can see which is the cutting face I'm interested in :ddb:
(I think I've rotated one of those pictures too many quadrants :bang:)
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