You do it in all your videos, but it's worth mentioning how you put each tool back in its place *directly* after using it. Wish I had the discipline to do that, would save me hours of "..... I had it just a moment ago......." :-) Keep up the good work!
Yeah. The hardest thing about that is to actually have a place for each tool. Once you do that, it's easy. Oh, and you also have to have first-order access to the correct place to put the tool back. If you have to move something to get to the tool, it doesn't work.
Very nice. I would be interested to see what 2 days CAM work looks like. I appreciate that real machining is different to CAD modelling, but that dovetail tightness does intrigue me. I'm not sure how many further passes you did, but I think maybe the dovetail is now perhaps 30-40 thou wider than the original model, which if right, is quite a lot. I recollect you measured the dovetail width of your sample block to tenths of a thou using gauge blocks. I also recollect that the 3D printed version was a little tight, though not I think as much as 40 thou. You put this down to expansion of the material, which seemed plausible at the time. Of course you may have edited the model since your videos, so maybe things were different by the time of the actual machining. Anyway, I'd be interested to see you measure the new block dovetail width with the gauge pins and blocks, to see if it has ended up the same as your measurements on your sample block. See how free I am with your time - the benefits of internet anonymity, I probably wouldn't have the cheek to ask you to your face.
The best mistakes to learn from are other peoples. I too am interested in the source of the dovetail issue. I'm not inclined to think your measurement was off, you seem pretty careful and methodical about the numbers (and everything else, for that matter).
Be very careful with that, it may be may okay for roughing but even a few tenths out of round would have a big impact on surface finish. Even the condition of the spindle bearings in the mill will show up on the surface finish so it would take a very precise grind. Holding the business end of the endmill that accurately while toolpost grinding with a lathe might be difficult. If you do this please make a video, I would love to see it.
Why not make a raised boss to mate with the recess in the bottom of the indicators? Would it not assure they were perpendicular to the tool post since that surface didn't have any powder coat on it? I would have also thought that it might help to keep crude out of the indicators over years of use. What does it mean to "post" or "repost" G-code? You seam to take great care to blow away swarf durring cutting operations. What does that accomplish?
I thought about a raised boss, but it would have required a very long, very narrow end mill to cut the channel around the edge of the pocket. I don't have anything anywhere near capable of that. "Post" is short for "post-process". It's the step of generating the actual GCODE text from the toolpath in your CAM program. Once I have the simulation looking good, I POST the code to create the file for the mill. Different post-processors can generate GCODE specific for different kinds of machines. I use MACH3, so I use the MACH3 post-processor. If I make a change, I need to RE-POST the file to generate new code for the mill. There are two reasons I try to keep the cut clear. First, it makes it easier for you to see what's happening on video, but more importantly, the chips that build up in the pocket get re-cut and can pack into the flutes and break the end mill. My Noga mini-cool doesn't always evacuate chips well, so I help it with the air gun.
Your coolant mister looks DIY. If it is I would love to see a video showing how you have it setup and all the parts you are using. I'm looking for a cheap solution for my Little Machine Shop mill that I converted to CNC.
How sure are you those were missed steps and not, say, a tool length setting issue? Just asking because the distant camera shot shows the z-axis of the mill before and after drilling the three holes in the absolute exact same physical position compared to its background, not having lost multiple inches...
Certain. You can hear it. The mill started to descend and stalled. It was still trying to move down when I pushed the button to stop it. It hadn't started any x and y movements yet. A tool length issue would have happened again when I ran it after changing the Z acceleration in MACH3.
It's nice having it around, for sure. I took the approach of buying a mid-range benchtop mill and converting it myself. You only want to do that if you want an ongoing project.
I'd really would like to see how you opened the dovetail up by 10 thousands. Did you modify the gcode directly, update the model and repost, or did you just update the CAM operations in F360? Any chance we could get a tutorialn on that?
Thank you. I just got back out to the shop and finished it yesterday. The video will be coming as soon as I can solve some weird computer problems I'm having at the moment.
You do it in all your videos, but it's worth mentioning how you put each tool back in its place *directly* after using it. Wish I had the discipline to do that, would save me hours of "..... I had it just a moment ago......." :-) Keep up the good work!
Yeah. The hardest thing about that is to actually have a place for each tool. Once you do that, it's easy. Oh, and you also have to have first-order access to the correct place to put the tool back. If you have to move something to get to the tool, it doesn't work.
It would be great to see your CAM routine for this project. Please do consider videoing that for us. Thanks for a great series!
I would like to see the Cam Process also. Thanks for all the great information
Dobra robota. Widać pasję i podejście do tematu . Pozdrawiam
Thank you. I'm glad you enjoyed it.
This is just too much fun!
Very nice. I would be interested to see what 2 days CAM work looks like. I appreciate that real machining is different to CAD modelling, but that dovetail tightness does intrigue me. I'm not sure how many further passes you did, but I think maybe the dovetail is now perhaps 30-40 thou wider than the original model, which if right, is quite a lot. I recollect you measured the dovetail width of your sample block to tenths of a thou using gauge blocks. I also recollect that the 3D printed version was a little tight, though not I think as much as 40 thou. You put this down to expansion of the material, which seemed plausible at the time. Of course you may have edited the model since your videos, so maybe things were different by the time of the actual machining. Anyway, I'd be interested to see you measure the new block dovetail width with the gauge pins and blocks, to see if it has ended up the same as your measurements on your sample block. See how free I am with your time - the benefits of internet anonymity, I probably wouldn't have the cheek to ask you to your face.
The best mistakes to learn from are other peoples. I too am interested in the source of the dovetail issue. I'm not inclined to think your measurement was off, you seem pretty careful and methodical about the numbers (and everything else, for that matter).
you can narrow the shaft on a endmill and can do the cutting in two parts without the rubbing
That's a good point. Maybe I should pick up a diamond wheel for my toolpost grinder, just for that kind of operation.
Be very careful with that, it may be may okay for roughing but even a few tenths out of round would have a big impact on surface finish.
Even the condition of the spindle bearings in the mill will show up on the surface finish so it would take a very precise grind. Holding the business end of the endmill that accurately while toolpost grinding with a lathe might be difficult.
If you do this please make a video, I would love to see it.
@@kentklapstein9879 i wa only thinking on making a waist on the bit so the part clamping in the chuck is un affected
Why not make a raised boss to mate with the recess in the bottom of the indicators? Would it not assure they were perpendicular to the tool post since that surface didn't have any powder coat on it? I would have also thought that it might help to keep crude out of the indicators over years of use. What does it mean to "post" or "repost" G-code? You seam to take great care to blow away swarf durring cutting operations. What does that accomplish?
I thought about a raised boss, but it would have required a very long, very narrow end mill to cut the channel around the edge of the pocket. I don't have anything anywhere near capable of that.
"Post" is short for "post-process". It's the step of generating the actual GCODE text from the toolpath in your CAM program. Once I have the simulation looking good, I POST the code to create the file for the mill. Different post-processors can generate GCODE specific for different kinds of machines. I use MACH3, so I use the MACH3 post-processor. If I make a change, I need to RE-POST the file to generate new code for the mill.
There are two reasons I try to keep the cut clear. First, it makes it easier for you to see what's happening on video, but more importantly, the chips that build up in the pocket get re-cut and can pack into the flutes and break the end mill. My Noga mini-cool doesn't always evacuate chips well, so I help it with the air gun.
@@Clough42 Thank you. Very informative as usual. Your videos help me ver much. Cheers
Your coolant mister looks DIY. If it is I would love to see a video showing how you have it setup and all the parts you are using. I'm looking for a cheap solution for my Little Machine Shop mill that I converted to CNC.
It's a Noga Mini Cool.
As always: "simply brilliant". Can't wait to see the next video.
Question? What was the spindle speed when you drilled the three 1/4" holes?
Thanks
2200 RPM--the max speed of my spindle. That's about 145 SFM. I'd probably run it at 3000-4000 if I could.
@@Clough42 Thank you James
Very nice.
How sure are you those were missed steps and not, say, a tool length setting issue? Just asking because the distant camera shot shows the z-axis of the mill before and after drilling the three holes in the absolute exact same physical position compared to its background, not having lost multiple inches...
Certain. You can hear it. The mill started to descend and stalled. It was still trying to move down when I pushed the button to stop it. It hadn't started any x and y movements yet. A tool length issue would have happened again when I ran it after changing the Z acceleration in MACH3.
Ah, now I hear it too, you're right of course. Thanks!
love the CNC work wish i could afford/ justify a CNC mill heck i wish i could justify a mill at the present time
It's nice having it around, for sure. I took the approach of buying a mid-range benchtop mill and converting it myself. You only want to do that if you want an ongoing project.
I'd really would like to see how you opened the dovetail up by 10 thousands. Did you modify the gcode directly, update the model and repost, or did you just update the CAM operations in F360? Any chance we could get a tutorialn on that?
rough one. seems okay as an outcome...
You’re way bigger now than you in this video，keep going！
Yeah. It's been a journey.
You do make a nice part and indicator holder for the lathe will be nice to see completed, new here.
Thank you. I just got back out to the shop and finished it yesterday. The video will be coming as soon as I can solve some weird computer problems I'm having at the moment.
Nice job and nice series. I am a new sub. @22:45 It looks to me like the measurement is 1.989 not 1.973.
Yeah, it looks like that to me as well. I'm not sure what happened there.