Here we go again . . . MK4

**Voicecoil** · 20-03-2019

Thanks very much for the clarification. I'm not so worried about squaring the gantry on the horizontal sense (having it parallel to the bed) - I have a big digital height gauge so can get that initially set pretty good, besides mine's single motor on the Z.- It was more the X,Y squareness for which the only "old fashioned" tool would seem to be a fairly huge and vastly heavy 3 way angle plate. I'm running twin motors/screws on the long axis (which I call Y since I look at it from the front), but was going to simply parallel up the inputs to the drivers, in the light of this maybe I need to have a bigger BOB or a bit of switching.

**Lee Roberts** · 20-06-2019

Would a 3.1Nm motor really find it that much of a challenge to drive 4 ball nuts all engaged at the same time on your Y ?

Super cool of you to do what your about to do btw

P.S Don't forget we have an open source section/forum.

**routercnc** · 20-06-2019

I'm not sure if I'm honest. To drive 4 ballnuts without pre-load would be fine I think, but when the ballnuts are clamped together there is an extra load to overcome, and the Y/Z is pretty heavy. Is it worth the risk to have missed steps on a critical job? Not sure.
Decided to leave it like that and put some pre-load between the front and back ballscrews instead.

Sending pm shortly . . .

**routercnc** · 22-06-2019

Hi Lee, pm sent . . .

**routercnc** · 30-08-2019

For anyone interested here is episode 26 of the CNC series giving an overview of my humble but functional CNC controller.

Also, for anyone who likes oscilloscopes there is a review of the Hantek DSO5102P oscilloscope supplied by Banggood.

Then right at the end of the video is a short montage of the controller build.

**routercnc** · 27-03-2022

If you see this Lee PM sent . . .

**routercnc** · 02-05-2022

I've had many requests for the CAD of this machine. I've also had requests for narration so I decided to put together a 3 part mini series to show a shorter version of the build for new viewers and also explain how the CAD can be downloaded for free (explained at the end of part 3). If you have seen the original 27 episodes of this build there is no new material, but the narration may help with explaining how I approached it.

Here is part 1 of 3: