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| shipto:
If thats the case I guess I am going to have to hope it doesnt need anything, that viscoelastic stuff looks complicated and probably expensive. I wish I had put more diagonal supports in before I welded the bottom on now but I guess I am not going to know for sure until its up and running and making swarf. |
| DaveS:
It's looking good Shipto :beer: Counterbalance weights are a well tried and tested method and can be fine tuned but I would suggest using bicycle chain and not Brass machine's latest (and good looking chain mail) :nrocks: Dave |
| PK:
Sorry if I'm restating something, I've come to this thread late (It must be outside this 'box' thing they keep telling me about) Here's my take on a torsionally rigid mill column. http://caswa.com/cncathome/X3.html Scroll down about 2/3rds I like the idea of filling with concrete. Adding mass is one of the simplest things you can do to a small machine to improve it....... PK |
| shipto:
--- Quote from: PK on April 17, 2017, 07:31:21 AM --- I like the idea of filling with concrete. Adding mass is one of the simplest things you can do to a small machine to improve it....... PK --- End quote --- I do too but Pekka disagrees and I see his point about shrinkage. However upon doing some extra reading it seems that most of the shrinkage comes from adding more water than is needed to make the concrete move better it seems that if the added water is calculated correctly then little shrinkage occurs but the mix is extremely thick. Will have to look into it a bit more. |
| vintageandclassicrepairs:
Hi Shipto, Research "epoxy" concrete as a filler, There was a long discussion on it on the CNC forum some years ago John |
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