Thk kr

[~andy]

I don't need massive speeds out of the machine. I'm happy with the 2m/m jog speed I have set on my current machine. That would be 100RPM at this pitch.

At this speed I'm guessing voltage isn't a huge issue. I do have a 24v/20A industrial switch mode supply that I can use for this project. Equally, if it's required I can throw a toroidal and some fat caps in a box.

I just need to figure out how much grunt I'm going to need to move the Z axis now! Sure I'll find a Nema 23 that can do the job.

[irving2008]

Read http://www.mycncuk.com/forums/faqs-p...do-i-need.html

I don't need massive speeds out of the machine. I'm happy with the 2m/m jog speed I have set on my current machine. That would be 100RPM at this pitch.

At this speed I'm guessing voltage isn't a huge issue. I do have a 24v/20A industrial switch mode supply that I can use for this project. Equally, if it's required I can throw a toroidal and some fat caps in a box.

I just need to figure out how much grunt I'm going to need to move the Z axis now! Sure I'll find a Nema 23 that can do the job.

[~andy]

Read http://www.mycncuk.com/forums/faqs-p...do-i-need.html

Thanks. That's exactly where I went after typing my reply. I seems that the 4Nm Nema 23 steppers I had my eye on at CNC4YOU should be fine.

At 100RPM, I reckon I should be able to get away with this DIN mount power supply (IRC you can adjust it up to 28v), which would be a nice tidy solution. I'll be mindful that I may need to swap it out for something larger when I pick the drivers.

[Boyan Silyavski]

Hi,
no personal experience with these KR, but as far as i remember reading at cnczone the guys were not too happy with the KR assembly. At least for Z.

[~andy]

I did have a quick read over at CNC zone about the KRs. I can see that people using the smaller models, single block, and large routers might have an issue with them as Zs. I've picked up a KR46, with two blocks and it's the same width as the spindle I'll use, so I'm sure it will be fine. It does look a bit tall, being so thin.

The KR55 is a monster, beautifully constructed.