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| Brass_Machine:
Bernd, Eventually it is going to get new screws... Whether that will be ballscrews or acme lead screws, I am not 100% sure yet. The stock nuts are going to be modified right away to allow some adjustment. They will become split nuts. I have been giving thoughts to this LEAD SCREW KIT. I am probably going to do new gibs as well... I just not sure what I am doing yet. Everything has to go by my budget which is very slim. You have any suggestions? Eric |
| Bernd:
Eric, If I were to CNC my mill I would start out with getting the gibs in better shape first. There are some tight spots along both axis' of travel on my mill. I really don't like the way the nut for the table just lays in a slot. Way to much slop, in mine anyway. Also does your mill have 16 threads per inch lead screws or the 20 threads per inch. Don't know if this would make a difference when CNCing it. I think it would. Take a quick look at my mod to the mini-mill when I changed over to 20 threads per inch - mini-mill. It might give you some insight as to what's underneath the table if you haven't taken yours apart yet. I think the biggest thing is to get both slides to move smoothly. Then the lead screws. I think John (Bogs) would be a good one to ask on how improve on the gibs. Bernd |
| Brass_Machine:
My mill actually performs quite nicely. It seems I lucked out and got a mill that was made on a good day. I have had mine completely torn down serveral times cleaning and lubing it. It slides fairly well. The backlash isn't too bad for now... that will change shortly. It's funny you mention the gibs. I have been researching them a lot. They guy I got my CNC plans from (and my DRO plans) has a bunch of articles up on using acetal for both anti backlash nuts and gibs. Article HERE. I am thinking about giving it a shot and seeing how it works out. Eric |
| websterz:
--- Quote from: Bernd on May 06, 2009, 09:14:16 AM ---Eric, If I were to CNC my mill I would start out with getting the gibs in better shape first. There are some tight spots along both axis' of travel on my mill. I really don't like the way the nut for the table just lays in a slot. Way to much slop, in mine anyway. Also does your mill have 16 threads per inch lead screws or the 20 threads per inch. Don't know if this would make a difference when CNCing it. I think it would. Take a quick look at my mod to the mini-mill when I changed over to 20 threads per inch - mini-mill. It might give you some insight as to what's underneath the table if you haven't taken yours apart yet. I think the biggest thing is to get both slides to move smoothly. Then the lead screws. I think John (Bogs) would be a good one to ask on how improve on the gibs. Bernd --- End quote --- You should definitely make new gibs for the mill. Here's a link that will help a lot. http://www.fignoggle.com/plans/figNoggle_gibStripViseBlock.pdf |
| Bernd:
Just read the write up on making the gibs. I think it would be great for a CNC project. For manual I don't like the fact that when you tighten the screw to lock the table you need to crank the screw several turns according to their write up. I would think that you would damage the accetal strip after a few tightenings. But it's only my opinion. My machine also has other issues with the gibs. I don't think a very good job was done milling them. I think they need to be re-milled before such a fix would work on my machine. Bernd |
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