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| PeterE makes a QCTP to a C3 lathe |
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| PeterE:
While waiting to get delivery of a 1.5 mm FC3 end mill to mill the slots in the port face of the Trojan, I decided to continue with my version of a QCTP (Quick Change Tool Post). I have been looking at various ready-made items, but found them too expensive for my liking and after finding the drawing(s) at the Ishimura site I knew I had found what I was looking for. The only difference is that I had to modify the size to better fit my SIEG C3 machine. when that was done I started to hack out the main block an old cast iron iron :palm: Some finishing off made it more looking like a what was a tool post to be. The locking sleeve came next out of a piece of 40 mm BMS. And the two put together it looks as follows. The came a centercolumn to be the center and the clamp to secure the whole thing to the lathe top slide. Some arms and at a test setup it looks like this - sorry for no pics in between). At this stage the whole project ran into a standstill until just recently. I badly wanted the QCTP functionality and a desire to finish something off - well partly that is - made me have a go at it again. A 12 mm dia silver steel plunger was made to suitable length to act as locking piston and an arm of suitable design was attached to the sleeve and finally a lick of paint giving the same test setup the following look. As can be seen there is a first tool holder as well! :D a typical standard one. I made a batch of 12 basic parts to become new tool holders. A few of the other types made so far are: The boring bar holder The threading tool holder Mike Cox type but with a dove tail instead of a mounting bar. This is a flip-up variant which looks like below when flipped up ... and finally one of the standard types to be. Only drilling and threading left to do. The QCTP works very well and locks the holders firmly and repeatably as intended. More holder of other types will show up every now and then. BR /Peter |
| andyf:
Nice job, Peter. Must be a relief to get it completed after two years http://www.model-engineer.co.uk/forums/postings.asp?th=45579 Still quicker than me, though. An X axis power feed for my milling machine was started at about the same time, and is still a pile of half-finished parts . Andy |
| PeterE:
--- Quote from: andyf on October 08, 2012, 05:24:47 PM ---Nice job, Peter. Must be a relief to get it completed after two years http://www.model-engineer.co.uk/forums/postings.asp?th=45579 Still quicker than me, though. An X axis power feed for my milling machine was started at about the same time, and is still a pile of half-finished parts . Andy --- End quote --- Andy, Two years :jaw: is it really that long ago :palm: well, yes it is a relief to finally get it on the way. Thanks for pointing out the model engineer forums thread, in the name of consequence I probably should add the latest developments even if those are found in another thread on said forum. So then, may I dare you to finish your parts and show some pictures on the way? Been thinking of that as well but too far down my list as it is. BR /Peter |
| andyf:
This is straying from your topic, Peter, but my power feed is intended to be something like the one Mike shows here: http://mikesworkshop.weebly.com/mill-power-feed.html The electrics are built (Mike's switching circuit is an improved version of one I designed to provide for a slow cut and quick return), but what is holding me up is designing an enclosure for everything. I don't want this to be any higher than the mill table, and needs to be stood 50mm" off the end of the table to allow for full X axis travel. Andy |
| PeterE:
No problems with detours Andy, IŽll bring it back :D But the idea of a power feed is actually very interesting after having wound the handwheels quite a few turns by now. Please start a thread (if you havenŽt done that already) I will be watching with great interest! More holders will be displayed as they get ready. BR /Peter |
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