(247,’2006-09-22 12:00:00′,’figNoggle’,’2006-12-20 08:02:29′,’david’,’Making The X-Axis Combination NEMA 23 / NEMA 34 Motor Mount’,”,’If you\’ve already seen the X/Y axis tests, that was the end result after having gone through some of the steps that we\’re showing here.
\r\nThe X axis had been tested using a single reballed 5/8\”x5TPI ballnut with oversized balls and an inexpensive rolled ballscrew.
\r\nBut first we needed to make the motor mount for the X axis. What we\’ve decided to do was to use the CNC X2 mini-mill (our plans work great!) to make a combo NEMA 23/34 motor mount for flexibility\’s sake.
\r\nStep 1. Using the pocket from inside to outside, we start with a ball end mill. We really should have taken that extra step and drilled a hole in the center..
\r\n
\r\nStep 2. Well, we\’ve run the machine too hard and forgot to re-adjust the Y-axis for backlash. The result is the dreaded \”egg\”.
\r\n
\r\nStep 3. After re-adjusting the nut, we started with the pockets again and then ended up boring the hole through:
\r\n
\r\nAnd voila! The motor mount side is completed.
\r\n
\r\nSince this started out as a large chunk of metal, we actually had to face the other side.. After a few minutes, it was faced to the thickness we wanted:
\r\n
\r\nNow that that\’s done (we also milled a pocket for access to the motor shaft), we do a test fit with a NEMA 34 frame step motor:
\r\n
\r\nAnd to make sure a NEMA 23 frame motor also works, we mounted one for good measure. Looks like it\’ll work!
\r\n
\r\nWe also had to mill the base that mounts to the X-axis \”bed\” and the mount. after a few simple facing, drilling and tapping operations, we put the two pieces together. We want to again point out that this is all done with the CNC\’d X2 mini-mill. Like we\’ve been saying all along, it\’s quite a capable little machine!
\r\n
\r\nWe also want to point out the flexibility of 1-2-3 blocks for use as a work stop. We\’ve built two of them up to match the height of the motor mount being machined so that we can take it out of the vise and re-insert without losing position:
\r\n
\r\nOK, now we all like watching videos of CNC in action, right? Well, here\’s the X2 mini-mill making the pockets for the motor mount. Click on the picture to play the video. Don\’t remember what speed it\’s moving, but it\’s taking a .02\” depth of cut (DOC) with a 1/2\” 4-flute carbide end mill running at something over 000 rpms. It was pretty quiet since we had our belt drive installed
\r\nFinally, after all that work and making a solid shaft coupling (not recommended, btw), we assembly the X-axis motor setup:
\r\n
\r\nNow, on to the Y-axis where we\’ll use a grade C1 ballscrew from THK with a preloaded nut. Absolutely ZERO backlash. No more \”eggs\” folks!
\r\nWatch as we make the Y-axis bearing block, end mount, and ball nut flange.\’
\r\n’,’
If you’ve already seen the X/Y axis tests, that was the end result after having gone through some of the steps that we’re showing here.
\n
\n\nThe X axis had been tested using a single reballed 5/8“x5TPI ballnut with oversized balls and an inexpensive rolled ballscrew.
\n
\n\nBut first we needed to make the motor mount for the X axis. What we’ve decided to do was to use the CNC X2 mini-mill (our plans work great!) to make a combo NEMA 23/34 motor mount for flexibility’s sake.
\n
\n\nStep 1. Using the pocket from inside to outside, we start with a ball end mill. We really should have taken that extra step and drilled a hole in the center..
\n
\n\n
\n
\n\nStep 2. Well, we’ve run the machine too hard and forgot to re-adjust the Y-axis for backlash. The result is the dreaded “egg”.
\n
\n\n
\n
\n\nStep 3. After re-adjusting the nut, we started with the pockets again and then ended up boring the hole through:
\n
\n\n
\n
\n\nAnd voila! The motor mount side is completed.
\n
\n\n
\n
\n\nSince this started out as a large chunk of metal, we actually had to face the other side.. After a few minutes, it was faced to the thickness we wanted:
\n
\n\n
\n
\n\nNow that that’s done (we also milled a pocket for access to the motor shaft), we do a test fit with a NEMA 34 frame step motor:
\n
\n\n
\n
\n\nAnd to make sure a NEMA 23 frame motor also works, we mounted one for good measure. Looks like it’ll work!
\n
\n\n
\n
\n\nWe also had to mill the base that mounts to the X-axis “bed” and the mount. after a few simple facing, drilling and tapping operations, we put the two pieces together. We want to again point out that this is all done with the CNC’d X2 mini-mill. Like we’ve been saying all along, it’s quite a capable little machine!
\n
\n\n
\n
\n\nWe also want to point out the flexibility of 1-2-3 blocks for use as a work stop. We’ve built two of them up to match the height of the motor mount being machined so that we can take it out of the vise and re-insert without losing position:
\n
\n\n
\n
\n\nOK, now we all like watching videos of CNC in action, right? Well, here’s the X2 mini-mill making the pockets for the motor mount. Click on the picture to play the video. Don’t remember what speed it’s moving, but it’s taking a .02” depth of cut (DOC) with a 1/2” 4-flute carbide end mill running at something over 000 rpms. It was pretty quiet since we had our belt drive installed
\n
\n\n
\n
\n\nFinally, after all that work and making a solid shaft coupling (not recommended, btw), we assembly the X-axis motor setup:
\n
\n\n
\n
\n\nNow, on to the Y-axis where we’ll use a grade C1 ballscrew from THK with a preloaded nut. Absolutely ZERO backlash. No more “eggs” folks!
\n
\n\nWatch as we make the Y-axis bearing block, end mount, and ball nut flange.’
\n
\n
‘,”,”,”,’Home-Brewed-CNC-Vertical-Mill’,”,0,”,0,4,1,1,’article’,”,”,’making-the-x-axis-combination-nema-23-nema-34-motor-mount’,”,”,”,”,”,”,”,”,”,”,’9d6271efd6481733610cbb4c8de8b782′,’2006-09-22′);