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Hallo Jono

A few thoughts for you to consider.

Just too look at it from a slightly different viewpoint.Whats sufficient precision for what you want to do?How little precision is enough?The...

One of advantages of epoxy is that you do get a coplanar surface for your rails quickly and easily.But it may introduce unacceptable flexion with what would seem to be heavy gantry and z.

Hallo jono
Very interesting and ambitious project here.The scale is impressive.
On epoxy leveling ukcnc seems to be the forum where epoxy leveling is the go to method.Those builds go into...

Thanks for posting up your build ,really enjoyed seeing the excellent pictures of its construction.Looks to be a great balance of size power and precision.Congratulations.

Most people I have read consider that the epoxy and aggregate for damping purpose alone are not critical as the purpose is to refract and reflect and hence diffuse vibration inducing impulses.I would...

So what do you think your system is capable of resolving 1/2 a thou of an inch or better ? Does it allows you to get the surface genuinely coplanar ? I notice it indicates tilt in the graphic.

A...

Personally I haven’t read in builds that have used it that it does offer a clear improvement.Perhaps someone who has used it will offer before and after experience.

Cons,
Does it actually...

Looking good so far like a serious machine tool.I like it.

I recall the original build now from seeing the pictures.Good to hear it worked well.I am considering epoxy and bolting myself.

The...

Looks interesting so far.

220kg sounds like a lot,how big will the machine be?

More details on what your building would be of interest too.

Is that a C frame mill column in pictures?
...

I remember this build.Good to see it being finished.Looking forward to the pictures.Thank you.

This is probably the best stepper selection piece I have seen,in case you havent seen it.
What size stepper motor do I-need.
You need to have data on the rotary inertia of your screws and...

Hallo Feist92 and all.FSwizard that I linked to in an earlier post does the same as Gwizard as far as I can tell. On line version free in case link doesn't work here it is again.In my play with it...

I find this interesting.I dont think anyone has tried this before.Let us know what you learn.

You might find using an application with a spectrum analysis plot of frequency versus amplitude easier...

Hallo all.

Congratulations on the job Feist92.

Disappointing about the bldc prices,perhaps the Chinese are protecting there retail agents.For comparison some local prices hmsnz.co.nz-370watt +...

Hallo Feist92.Your z-axis looks much bigger in the photos than in the drawings! Looks good.

Just to repeat those bldc links for consideration seeing Ian couldnt get them.

Brushless DC Motor,...

Hallo Zach_G
Nice machine.Thanks for sharing your column epoxy recipe,I might use that in the future,nice to know it was successful over time.
Did the new spindle cure your problems? Did you ever...

Looking massive, definitely a build headed away from the hobby orbit to the pro one.Displays some excellent skills.Add it to your cv?

Link for speeds,feed,power etc. Downloadable version not free....

Congratulations on the successful completion of your eg mill.This is a build which I am sure has interested many people.Its of a size that many of us would find very useful and judging from other...

I 'm watching this with interest please keep those pictures coming.
These links may be of interest,showing the implementation of similar spindle idea and interesting atc.

CONVERSION: X3 mill...

Looks impressive. Didnt think you would be able to find anyone here in NZ to stress relieve at a reasonable price.What will the stress relieving involve? What size rails do you plan on using?

Specs on Rustolem seem close to what you see with an eg,from my quick scan.But specs require careful interpretation and never seem to tell you all you need to know.
Compare with this Zanite.But the...

Hallo dan_the_welder

Thanks for the pictures of the prolight milI .I have looked at pictures of this mill before to see what could be learned.Never seen a rear view before and not what I...

I am almost certain this will be the first machine constructed of eg on this forum.So congratulations will be due soon.Looking forward to the video.

Agree with others,seriously impressive.Congratulations.
Work area? Head design? -belt or gear drive,bearings.How long to build? Please show more pictures.
Looks big enough to do car bodies(in...

Calculating the difference in dimensions using expansion coefficient.

Expansion figure for aluminium is 24 micrometres/metre/degree Celsius. Steel and eg both about half this.
So for 500mm length...

Your machine is looking very nice, professional.If I estimate its size correctly it fits within a 500mm cube.Nice and compact but strong.
How did you resolve the lack of smoothness (rail alignment?)...

I like you design.I am hoping to build a machine of similar size so your design is of
interest to me.It looks well proportioned and should be very stiff.Portals look
to be the best...

Congratulations,nice machine.I enjoyed the pictures of progress.It looks to be strong,

Can you tell me the rail diameter you used.I could not find it anywhere in the thread,but may have missed it....

Wow.Beautiful work.Makes you appreciate what goes into the making of a spindle.As you say you have the machines and more importantly you know how to use them.Thank you for the pictures.
What...

This is a fascinating thread of a hugely ambitious project.Thanks for sharing your technical knowledge,insights and challenges.I wish you well with this or any future build. I will certainly continue...