[ger21]

They are actually very repeatable, as repeatability is somewhat independent of accuracy.

Because repeatability is rather easy to attain, as is flatness, for most people, the only requirement is to get it square, which can easily be done by making some test cuts.

You may be surprised how easy it is to get a machine that's remarkably accurate and consistent. If you need ultra high precision parts, that all need to fit together very well, than a router is probably not the right tool for you. If you need everything to always be within .005" or less, it get's a lot more complicated.

[JFL4066]

They are actually very repeatable, as repeatability is somewhat independent of accuracy.

Because repeatability is rather easy to attain, as is flatness, for most people, the only requirement is to get it square, which can easily be done by making some test cuts.

You may be surprised how easy it is to get a machine that's remarkably accurate and consistent. If you need ultra high precision parts, that all need to fit together very well, than a router is probably not the right tool for you. If you need everything to always be within .005" or less, it get's a lot more complicated.

I guess what I'm trying to determine is, what is the acceptable accuracy and consistency everyone is seeing in an 'average' DIY and Kit CNC router. I'm a numbers guy. LOL.

[ger21]

I guess what I'm trying to determine is, what is the acceptable accuracy and consistency everyone is seeing in an 'average' DIY and Kit CNC router. I'm a numbers guy. LOL.

What's "acceptable" can vary greatly from person to person. That's why you can buy a machine for $1000, or a similarly sized machine for $10,000.
Different levels of acceptable.

Almost 15 years ago, I built a machine from MDF and plywood, that uses skate bearings on pipe for linear bearings. I have no idea how accurate it is? But if I cut multiple parts that need to fit together, they'll all be within .005 of each other. If I cut 10 differerent parts that all need to be 10" long, they'll all be the same size.

I know it's not perfectly square at the moment, but it doesn't matter for what I currently use it for. I know it won't cut perfectly round holes, but again, they're close enough for what I need.