Looks good! Still waiting on my mill to arrive...next couple of weeks (fingers crossed). Any chance the CAD models for the base mill will be available? I was planning to reverse engineer mine once it showed up but would be interested in purchasing your models. Would save me some time and give me something to mess around with while I wait.
Jason Anderson myhub.autodesk360.com/ue29b5448/g/shares/SHabee1QT1a327cf2b7ad8570be8f14f9c32?viewState=NoIgbgDAdAjCA0IDeAdEAXAngBwKZoC40ARXAZwEsBzAOzXjQEMyzd1C0A2AEwE4IArANwBjALSdeAFgBGYqbgDMnMY14AOAExj1ixupHrGAdlwAzMzLQBfBDFicYvRVOeKBzzcanxO6qOoQnIKavGHhYfDQEDEwMa4RYeoCEFICnFFQMRBO3olJ3hDuvv6BwQKh%2BbzwMCUBQSFV1dGx8VXJqemZ2bkJieqFxaXqMMbqUrmxmhW4YjAZIAD2CC05bfkdaRmrve2DAvDDo%2BOTOdOas-NRNdcQN3cgCI%2BIxpwIwAC6H0A
Very well thought out. Can't imagine how long it took to reverse engineer this machine, then turn that info into a CAD model. The smaller ball screw on the "X" sounds like it'll work, as it's just moving the table since the ways are actually supporting the table. Will be interesting to see how it holds up over time.
Great sir. I have a doubt. How much position accuracy does this machine design gives. How you are controlling backlash in x and y axis screen rods. Whether dove tail guides gives much accurate positioning than linear guide rails. Please answer
Thoroughly convinced the CNCMasters's - CNC BARON MILLING MACHINE is a better way to go. It already has everything you mention here and I bet by the time you're done you'd spend the same or less on their mill.
@@FrancoCNC True, and I'm assuming your concern would be rigidity during operations, especially if the quill were largely extended? My only response is their reviews have been stellar. Also did you see their CNC SUPRA MILL? It's a full scale CNC knee mill for $11k, and they have customers that have been running it over 8 years, no issues. I've got to believe for that money and customer reviews, their credibility looks pretty legit.
Hi Ronnie. If you can live with a very small machine, check out Sherline. Their stuff is small but it is of very good quality. You can buy a CNC package ready to run out of the box. If you need something larger, then the PM25MV of the PM30MV are (IMO) the way to go. Of all the importers of inexpensive Chinese (and Taiwanese) machines, Precision Matthews is the best. They will give you the best version of these machines.
Hi Franco,I have a PM25 mv also. Base machine is great, and I like what you are doing. I am awaiting arrival of clearpath servos. I have 16mm lead screws, and I think larger is better. I've been chasing .004" backlash for too long now. I am thinking it is either leadscrew flex or ac bearings or a combo of both. I have double ball screw nuts on all axes, they are a challenge to fit. So I am going to source tapered roller bearings for lead screw anchoring and 20mm roller leads, maybe your cartridge apprroach is worth looking at. Thanks for posting. Rob
awesome stuff. just my thoughts, putting two limit switches per axis, with closed loop steppers, and mach 4 is kind of a waste. all you really need is a referance switch, and then set up your software stops.
Hi Eitri - good point. I go back and forth on that one. I agree, soft limits work great. However, there have been those times where I "accidentally" turn them off and over travel my machine. On this design, it's not that much more work to have two switches for X and Y axis, so I'll probably just keep them in there. However, on my lathe, I only use one per axis as that is more practical. Thanks for your comment. Keep them coming!
Franco, Extremely well done presentation sir. Once again keep up the good work. I do have one question for you. Have you considered the Y-axis travel for your mill? If so, what is your expected result? Personally, I was expecting to keep 6 inches on Y-axis but as it turns out I have made a calculation error and my current Y travel is 3.5 inch. I was considering turning my ball screw nut 180 degrees opposite of your diagram. Also I did grind a slot for extended range. If you have the time, I would like to have your opinion on the matter. Thank you for your time. Keep the videos coming, I am anxious to your mill in action.
Hello. Thank you for your comments. According to my solid model, I should have 6.85" of Y-axis travel without the need to modify the machine. I'm working hard to get this thing finished. I'll be sure to post videos when it is up and running.
Franco I am certainly interested in regaining this lost travel, if you have suggestions I would welcome them. what length for your ballscrew y axis. if you do not mind sharing.
Hey Franco can you share where you got the ball screws and lengths? I would like to be prepared to rip apart with all my parts ready to go back in. By the way great job
Awesome work Franco! I don't suppose you'd make your base model available for download would you? I know lots of people would greatly appreciate your hard work.
Great video Franco, it was great to hear some of the reasoning behind the modifications. Are you concerned about the reduced Torque resulting from the spindle modifications?
Hi. I'm not worried about reducing torque. I've done a similar modification on the G0704 and I've never had a problem. The G0704 has a hi-low gear box so it's easier to drop into low range for drilling on that machine, but I don't think it will be too hard to move the belt on the PM-25MV. Thanks.
Thanks. I wish I had more free time so I could get this finished sooner! How do you like that new Skyfire milling machine? I'm really curious to see how that compares to a Tormach.
