surface grindy type project

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shipto:
Made some good progress today (thanks mostly to the word NO! long story) anyway I started to set things up better than they were, the main runner plate is set as good as can be until I make a few cuts and see how it is grinding. started to weld the frame to the base but ran out of wire before I had finished tacking it so its still clamped for now until I get more wire.
Also started on the up/down for the grinder its just a simple slide using angle irons and a little bit of flat for a gib. It all seems to go together well. The gearing for the screw for this is well under way too but i forgot to take pics of just that so theres one job for tomorrow. :D

shipto:
Progress :ddb:

mattinker:
I'm enjoying your shoestring Grindy thing!

Regards, Matthew.

shipto:
I stopped short of calling it a surface grinder because I have seen some get quite elitist about them :D

PekkaNF:

--- Quote from: shipto on March 25, 2014, 05:59:44 PM ---PekkaNF you have really done it now :hammer:
--- End quote ---

What I did now? :) I mean I live for things like that.

--- Quote from: shipto on March 25, 2014, 05:59:44 PM ---A much better way which would solve both the problems with feeding the grinder to the work and having a course feed for setting it close. If I can A) get hold of the correct tap for the screw I am using (possibly a 18X4 LH trapazoidal) and tap the center of a worm gear or B) turn the nut I already have and press it into a worm gear, I can lock the thread at the bottom to use the fine feed or let it free and turn the screw for the course feed, something like that shown in picture except the screw could be locked off rather than fixed.
I hope you get the idea of what I am thinking.

--- End quote ---

To tap trapezoidal is not very easy and taps are not exactly cheap. Also threading small ID trapezoidal thread is no fun. Buy the nut and make it do if you can.

I think got your idea....you want to do fast traverse by turing the screw, and (slow) feed by using worm drive. Nifty. You need brake/lock for the srew tough, but that should be pretty doable. Simplest form might be extra nut on the tapezoidal spindle to lock it imovable to the frame.

Pekka

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