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Old 07-17-2016, 07:13 PM   #41
Rndmann9
 
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Ok finally made a mount and got the z motor mounted and moving. I have to mount some limit switches and hopefully be up and running real soon. Sorry for the upside down pic. Apple sucks.


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Old 07-17-2016, 10:15 PM   #42
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It's Alive - -

Have my Y axis drive setup 90% [?] in order - Soon as/when/if I find the cord to grab the pic from the camera - - - The applesauce brain of mine can never 'member where it is the thing was put to be found again . . .


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Old 07-24-2016, 04:48 PM   #43
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Still fighting my y axis. Still binding in spots. Coupling slippage still a problem. I ordered another coupling to maybe grip it on the 10mm part of the shaft and with luck I can use the key slot to lock it down. I also ordered a 16mm x 300mm ball screw if option A doesn't work and I'll just make a new shaft for the y. Didn't want to go there but it's time to get tough on it. Other than that other two axises are moving well.
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Old 07-24-2016, 04:50 PM   #44
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Once I get that I have to figure out how to adjust for backlash. Might need to modify arduino script some. It's not bad but exist.
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Old 07-25-2016, 01:50 AM   #45
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After I added the additional set screw to hit the flat on the stepper shaft, tightened down the clamp screw, then the set screw for the flat. Took it apart and where the mark was on the flat took a center punch and gave that spot a whack [I didn't say that out loud, did I]

With a little "Tooth" to bite on, it stopped creeping back.
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Old 07-25-2016, 02:04 AM   #46
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Mine is grabbing on the 12mm of thread that formerly was where the two jamb nuts were. I ordered a 8-10mm coupling to maybe grip it on the 10mm smooth section. My problem was when it bound it would basically screw itself on or off the shaft. Was trying not to damage the threads though. I've tried three different 8-8 couplings but had similar results with each after a while. Also having some trouble with my limit switches tripping as soon as a move starts. Must be picking up noise somewhere so I might make some high pass filters to eliminate that. Most of the cable is shielded but I guess the little bit that isn't is playing antenna. For now I'm just using soft limits to keep it from sacrificing itself. Aggrivated with the y though. Tired of messing with it so Tuesday I guess I'll be on the lathe making a new shaft from the ball screw. Either way it's easy to reverse if need be. Wish I had two mills now. I'll prob get a bigger one if I ever move which is soon hopefully but I only want to move it once. I want a new lathe too but same applies. Still trying to get a grip on the grbl program and universal g code sender. Does some strange things with the g code sometimes- so I am still trying to figure out what it wants as far as set up and coordinates go.
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Old 07-25-2016, 02:22 AM   #47
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Ah, that's right, yours is a front drive - I went at from the rear to keep the manual turn handle in place - With enable OFF they turn as if no motor was attached - Enable On, have to overcome the steppers holding torque to turn it . .

Electronics - Blah - - Last Good to First Bad and ground everything . .
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Old 07-29-2016, 12:43 AM   #48
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Yea the way the column mounts prevents back option for me. So far 8-10mm coupling is working. I borrowed your idea and put a slight dimple in the shaft with a drill. ( if converted back to original that part of the shaft would be in the handle so the dimple is irrelevant as far as that goes). I also machined a backup plan if my y axis keeps giving me grief.
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Old 07-29-2016, 12:46 AM   #49
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Never disassembled and reassembled a ball nut. Interesting but not as hard as people make it out to be. I found it relatively easy once I figured out my method. It was a much harder task machining the screw if compared.
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Old 07-29-2016, 05:43 AM   #50
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Ball nuts? That's getting fancy - - I'm still in the age of stone ax and flint knife . . . Myself am just dink'n around seeing what I can and cannot do with the contraption. Have to remount the Y motor - Flip it 180 - As it is, the motors just clear each other, if I put the little rear cover on [cosmetic thing] then they hit - Plus can flip the pulley's around and move the belt farther aft . .
Stuck a photo on my arduino thread

The Y, Yup with the windshield washer motor I used originally tapped the coupling to thread onto the motors existing threaded shaft, dimpled into the threads where the set screws rested and lock tight - Never came loose, rather than come loose, the spring type coupling snapped . . .


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