what to do with a free scrap dumpster find ?

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24 Apr 2022 17:11 #241084 by machinedude
i have had the longer bolts needed to mount the servo for a while but needed to make those stand offs for the motor. i finally got around to making them yesterday. i was not to excited about only having 3 points to mount to but if it works and i can't see it then it won't bug me as much so i came up with a cover to hide it all. out of sight out of mind :)

i should be able to use the original way covers for the head so that part is figured out i think i just need to strip the rest of the piece down to bare metal so i can give them a fresh coat of paint. what i cleaned up just has some rattle can primer now. i was a little cut happy with the clearance for the motor but the new cover hides all that.
     
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25 Apr 2022 01:31 #241132 by andypugh
Can you get thick-walled aluminium tube to make one part containing 3 standoffs?

I have done no analysis, but visually that looks too compliant.

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25 Apr 2022 02:24 - 25 Apr 2022 02:36 #241137 by machinedude
those standoffs are 1" diameter with a .330 thru hole so the walls are about as thick as i can get them keeping them basic.

i will have to look tomorrow but i might have a flat motor mount section made or needing some slight modification to make use of the boss on the motor? i will have to look tomorrow. nothing is ever final or complete with this project :)
Last edit: 25 Apr 2022 02:36 by machinedude.

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25 Apr 2022 13:06 #241204 by andypugh
It's probably best to try it and see. I don't imagine it will flex enough to cause any actual inaccuracy. My concern is that it might have a torsional resonance at some speeds.

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25 Apr 2022 14:45 #241209 by machinedude
i actually checked this morning to see if i had some extra parts and i have some NEMA 34 flat mounts made from 1/2 Aluminum. The servo's have an 86mm frame size but the boss on the motor for the 86mm fame is actually bigger than a NEMA 34 frame. so i can bore the boss hole to fit the 86mm motor boss and relocate the the mounting hole since the are close to the 86mm mounting hole. the flat mounts have a small taped hole and i only need a trough hole in that part so i have some correction room. i can bore half way into the flat mount and press fit the standoffs into the flat mount. this way it's almost a 1 piece mount. i like this much better since i only have 3 points on the connection.

i probably got ahead of myself on the motor mount and was more tied up making the cover. i know i had a lot of my free day over the weekend used up making the cover and hardly an time making standoffs :)

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07 May 2022 04:14 #242202 by machinedude
i thought i could use the old covers on the upright but things are just not going as planned on the moving parts of the covers the way it was set up before. so later today i will see if i can figure something out here. it's probably better to upgrade since the covers were not intended to be under power and moving very fast.

while i am at it i am going to try to get a cover across the back side where every thing is going to be landing so i have some sort of plan for chip control. it would be nice to get the lubrication pump mounted and the line run to supply the split bearings and ball screw since other than wires is all that is left to do there.

once all this is sorted out i can start mounting the linear scale on the upright. i have one 400mm scale here and just ordered the other two i need today so i should have those next week.

9 months later and i finally feel like i am starting the on the downhill side of the mechanical part of this adventure :)

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21 May 2022 23:48 #243510 by machinedude
       

making chip covers is not something i like doing :) but am getting close to having it all sorted out. i now have all my linear scales and 2 out of three of them should be simple to mount i have to think about the Y axis mounting a bit more. i think i figured out why the old covers were giving me a hard time. i should have taken pictures of things before i tore the machine down. i had one of the cover section on wrong and i need to shorten up the guide rods that i replaced they were hitting the base when the travel was almost all the way down.

as for the chip cover on the back i had just enough sheet metal here to make a crude telescoping cover to keep the chips away from getting under everything. i had to resort to attaching some bent end caps since i had next to nothing here to work with. i still have some things to adjust and maybe add some clearance for but they will do what i need them to do for now. i still need to do some kind of skirt on the table to close it up better but it's getting there slowly :).

i have an open section on the original covers that was for grinder stuff. i think i will make a cover and attach a lighted switch there to control the air cylinder for the draw bar. it will be easy to fish some wires around to the back to keep all that stuff organized.
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28 Jun 2022 15:55 #246088 by machinedude
took a little break from working on this and got back to it this past weekend. i was sorting out oil line needs and picked a few odds and ends up and somehow managed to spend almost $200 for next to nothing :) check valves for oil lines and 10ft of VFD cable was over a $100 ouch :)

sad part is i had some stuff laying around and was able to reuse some of the original stuff and this was the cheapest way out :) i guess the days of being nickeled and dimed to death are a thing of the past :)
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