Printable View
OK You might have been better with 8 wire motors wired in parallel as you would get more speed out of them I take it these are for a router. Although having said that I have no experience with the motors and drive you have.
I have 4 motors on my router running from a 500Va tx at about 70V with no problems. I doubt they would pull more than 8-9 A
Good luck with the build.
Woohoo! That is one stout build and very clean work, particularly for not having a mill. Seriously, great stuff. I missed the type of linear rails you're using and do you like them? Also, do you have a supplier. I'm in the USA.
Thanks
Thanks for the compliment about the work I've done and it maybe a bit of overkill but better stout than all flimsy. The rails I'm using are Hiwin 20mm ones together with narrow carriages on the Z axis and the wide ones on both the Y and X axes. I got them custom sized from a supplier here in the UK. If you want them you could try Fred at BST Automation on AliExpress. He sells Hiwin stuff and is a great supplier as I got a set of custom ballscrews from him and had no problems at all with them.Quote:
Originally Posted by wiremonkey
Sent from my iPhone using Tapatalk
MILLING WITH A ROUTER!? Impressive. Nice work!
Hi everyone, I've managed to get a bit more done on the router build, and have finished the 4 end plates which connect the 2 X axis aluminium extrusions, the corner legs and support the X axis ballscrews. I had to slightly alter the design as the ball screw on the fixed bearing end protruded through the end plate a bit more than anticipated. I had to make a simple rectangular cutout for the motor and a separate plate for the motor adjustment to tension the belt. To make the rectangular cutout I made a series of holes to get rid of most of the material and then used a end mill in the router and a template to neaten it up.
https://uploads.tapatalk-cdn.com/201...ccece96d19.jpghttps://uploads.tapatalk-cdn.com/201...db6bd6082a.jpghttps://uploads.tapatalk-cdn.com/201...f3dc763afb.jpghttps://uploads.tapatalk-cdn.com/201...f3ee8f3b69.jpghttps://uploads.tapatalk-cdn.com/201...0e1da148a8.jpghttps://uploads.tapatalk-cdn.com/201...648735f0bd.jpg
Nice work!
The second part of the update is the making of the motor mounting plates which were done in a similar way to the end plates. The 4 bolt slots were first drilled and then tidied up using the router and a end mill. This time I didn't use a template, just a side fence and 2 stops at the front and back. The centre slot was then made bigger then necessary to allow for larger pulleys to be used and because the motor face was not flat and had a raised centre part.
https://uploads.tapatalk-cdn.com/201...9ab54b06aa.jpg
https://uploads.tapatalk-cdn.com/201...0eec66f2ea.jpghttps://uploads.tapatalk-cdn.com/201...945c187a3b.jpghttps://uploads.tapatalk-cdn.com/201...cb5d221ce3.jpghttps://uploads.tapatalk-cdn.com/201...fcf77cd731.jpghttps://uploads.tapatalk-cdn.com/201...492b2ed4c6.jpghttps://uploads.tapatalk-cdn.com/201...884b29ce33.jpghttps://uploads.tapatalk-cdn.com/201...4b673e8a5f.jpghttps://uploads.tapatalk-cdn.com/201...652a51e262.jpg
Wonderful work. Anyone looking to build their first CNC machine without access to a mill should bookmark this thread as a great example of bootstrapping your way in.
Hi routercnc, thanks for the compliment, I've enjoyed following your MK4 build and watching the videos you have made. Believe it or not I haven't done much metalwork before, so this has been a voyage of discovery as well. I think some of my success has been in getting some proper layout tools such as the height gauge and optical punch off eBay and learning the basics of Fusion 360 which really helps visualise the parts and the design as a whole.Quote:
Originally Posted by routercnc
Sent from my iPhone using Tapatalk
Hi everyone, I've made a bit more progress with the build and have built the unregulated stepper PSU. I managed to get a cheap 2*45VAC toroidal transformer which is probably well over specification, but it was a good deal. It will easily power the 4 steppers and a 5th when I add a rotary axis at a later date. I decided to include a Sedlbauer inrush current limiter because of the toroid size, and spent a bit more money on 105 degree centigrade rated capacitors. I have used the aluminium base plate as a heatsink for the bridge regulator and used a heatsink thermal compound to get good heat transfer. I was pretty confident that I had wired the PSU correctly but decided to play it safe and power it up using a variac to gradually increase the mains voltage from zero up to 240VAC. It all went well and nothing went up in a cloud of smoke.
https://uploads.tapatalk-cdn.com/201...860bd0f43d.jpghttps://uploads.tapatalk-cdn.com/201...caf3972619.jpghttps://uploads.tapatalk-cdn.com/201...a16244fad3.jpghttps://uploads.tapatalk-cdn.com/201...c154e5fa99.jpghttps://uploads.tapatalk-cdn.com/201...585b72724b.jpg
Sent from my iPhone using Tapatalk