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
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
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
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
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.
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.
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.
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.
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.
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.
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!
Beautiful work Franco. Can't wait to see it running.
Thanks. I'm looking forward to making all the parts.
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.
Yes, my OCD really kicked in on this project! So far, the 12mm ball screws have been working great. No problems at all.
Do you sell the cad drawings for the conversion parts
Great vid! Is this cad file available for purchase?
You are amazing Franco ! File that system !
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
you could run plastic lines for the grease fittings too for a central greasing area, similar to your central oiling system
Good point. That may happen. Thanks.
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
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
Hi Rob - I'm glad you like the video. Eventually, I'll know for sure how well the Ø12mm ball screws work with the cartridges. Stay tuned!
Awesome !! the PM website says the 25s are sold out, they have 30s on the shelf tho. I have dreams of a PM-30MV with Clearpath servos and GRBL.
That would be a nice setup.
Have you looked into Teknic Clearpath Servos? Everyone that uses them say the would never go back to steppers again.
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
tat2joeelliott bst automation or automation overstock
Julius Jahn I know WHERE to get ballscrews I wanted to know the lengths. But it’s already taken care of
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.
Good to hear, I look forward to your future videos on the build. Cheers, Matt.
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.
Their stuff looks nice but you don't get a true Z axis. They are only automating the quill.
@@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.
@@jryer1 for the price, that is hard to beat.
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.
Hi. I'm not ready to let them go just yet - but maybe some day.
:( Thanks for the reply. Great work anyway.
Awesome work Franco 👍
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.
Franco what type of limit switches do you use ?
Something that looks like these: ua-cam.com/video/MOhudoeWlBc/v-deo.html
Mr. Franco i have a pm25mv too you have prints on the cnc conversion?
Hi. Look at the description of this video: ua-cam.com/video/_vhGMaPFhkM/v-deo.html
Do you have the part numbers for the ballscrews and where you got them from?
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.
Is this a good machine to build on? I mean from the manufacturer in China. I need a good desktop mill that can be retrofired to CNC.
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.
Franco what size of steppers are you using? nema 23's and nema 34 for z?
You are correct. Truth be told, I think I could have used the closed loop NEMA 23 for the Z axis, as well. They are very powerful.
Repeat question from below.. do you sell the cad drawings or the Fusion file?
Check this out and look for a link in the description: ua-cam.com/video/FR6Na9ZWmLs/v-deo.html
Free for you to use!
what size of stepper are you running?
Check this out: ua-cam.com/video/j9EpLjhIOVQ/v-deo.html
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!
Your right, I wish mach 4 would default with them "on" instead of "off" and you always have to rememper to turn them on
Are the fusion360 files available for purchase?
The files are free: ua-cam.com/video/FR6Na9ZWmLs/v-deo.html
File available?
myhub.autodesk360.com/ue29b5448/g/shares/SHabee1QT1a327cf2b7ad8570be8f14f9c32?viewState=NoIgbgDAdAjCA0IDeAdEAXAngBwKZoC40ARXAZwEsBzAOzXjQEMyzd1C0A2AEwE4IArANwBjALSdeAFgBGYqbgDMnMY14AOAExj1ixupHrGAdlwAzMzLQBfBDFicYvRVOeKBzzcanxO6qOoQnIKavGHhYfDQEDEwMa4RYeoCEFICnFFQMRBO3olJ3hDuvv6BwQKh%2BbzwMCUBQSFV1dGx8VXJqemZ2bkJieqFxaXqMMbqUrmxmhW4YjAZIAD2CC05bfkdaRmrve2DAvDDo%2BOTOdOas-NRNdcQN3cgCI%2BIxpwIwAC6H0A
you're everywhere! ;)
How much do you want to convert mine for me? Haha