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Another homemade milling machine
shipto:
Sorry hit send before I finished:
This being the case I can now look at modifying the head casting to take the milling head once the machine is working reasonably well.
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mexican jon:
--- Quote from: shipto on May 02, 2017, 05:20:27 PM ---Made the base while at work today and fitted the column to it tonight. I could do with a decent square as it seems a tad off but I cant be sure my set square is accurate, however there is one major problem with the 76x38 when its tight it is spreading around the bed at the bottom but not at the top so the head is being taken off square so I either need to use something better or weld something in to stop the bottom spreading.
In pic 3 I show the table in about the position it will be on the knee and the hole in the base is where I am planning to put the lifting screw for the Z axis, I would welcome opinions on wether I should move that forward nearer to the center of the travel? my first thoughts where that the screw should be reasonably close to the column to ensure the knee would move smoothly but I am not too sure now.
--- End quote ---
I've got some spare spare round bed castings if it would help with the mounting of the head ??? yours for postage? just checked and there is a bed as well :headbang:
shipto:
Thank you Jon but I have the castings
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shipto:
:ddb: I am happy now because I put the knee on and did some clocking, with a tool in the collet and everything tightened up I got .07mm twisting it from side to side not sure how that compares to other small millers but it seems pretty good to me and it should improve once I get the origional head casting sorted rather than the bit of channel the best bit though was from the knee to the column and putting weight on the knee I got .01 if you want to be picky .02 but that was a lot of pressure.
Sorry Vtsteam but it seems my gut feeling on the position of the lift screw was correct I thought I would test with a jack and on center it locks up on the column I could move it forward a little but since I have already drilled the hole I will stick with that.
Tomorrow I will cut some bits of tube to mount the motor.
vtsteam:
--- Quote from: shipto on May 03, 2017, 03:18:40 PM ---Sorry Vtsteam but it seems my gut feeling on the position of the lift screw was correct I thought I would test with a jack and on center it locks up on the column I could move it forward a little but since I have already drilled the hole I will stick with that.
--- End quote ---
No need for apology, it's important that the knee actually be able to slide on a mill! :lol:
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