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So I'd considered using two screws for the x-axis, which would theoretically give me twice the torque for moving the gantry. Thoughts on that approach?

I'm not sure how important rapids are to...

#awerby > Not sure I'd agree with that assessment. The non-moving parts are by no means lightweight. The Misumi HFS8-80160 extrusions that make up the x-axis are actually heavier than the 8020 3060...

Yeah this is definitely blowing the "budget" I had in mind when I started out... but surprisingly, moving to the much heavier 80x160mm Misumi beams (with precision cut) only upped the cost maybe...

one note - the very long, 6" end mill shown in the render will be for milling foam. For harder materials, I'll reposition the grantry lower on the risers.

Ok, after about 4 months of research & planning, I'm ready to start my build. I'll mostly be using this to prototype airplane parts (lots of foam cutting), but also want the flexibility to cut...

The technical info on Automation Overstock claims the LG series has equal loading capacity in all four directions: Hiwin LG linear bearings from Automation Overstock, LGH Hiwin linear bearings, LGW...

I'm using the HIWIN LGH 25mm profile rails for my X-axis.

Is there any reason I can't mount them on the bottom of my x-axis extrusion(so under the table), rather than on the sides or top of the...

Sorry this is such a basic question -- i've searched the web and found lots of details on how to clamp things to your bed, but nothing on how to ensure that the piece is accurately positioned when...

I'm very new to machining, just got a Grizzly G0704, and am trying build a 36" x 48" CNC router, using 80/20 extrusions.

What I'd like to do, is use the G0704 to facemill the surfaces of the...

Thanks Mac, I went ahead and ordered the 660u

Thanks. Still trying to decide if it's worth returning the 5" vise I already got for credit? After shipping that's only $50, thinking it would be better to just have a second one?

I'll be CNC'ing...

I'm trying to decide between two 6" vises from Shars.com, the 690V 6" CNC milling machine vise for $275, and the 660U 6" CNC milling machine vice for $380.

Both have .0004" repeatability. The...

I'll be using the Gecko 540 driver. I'm not super concerned about rapids, since most of the time the machine's in use it'll be cutting, and travelling much slower anyway (cutting large foam blanks).

I'm trying to decide between the 380oz NEMA 23 steppers from Fine Line Automation: 380 oz-in Nema 23 Stepper Motor and the 381 oz motors from Keiling: KL23H2100-35-4B

I like that the FLA...

I'd hadn't thought about the limit switches etc. Maybe just the same computer & possibly the power supply, keep the drivers separate.

So I'm building a cnc router and also have a G0704 manual mill that I'd like to convert to CNC.

Is it possible to run both CNC machines off of the same computer and Gecko 540 driver? I'd like to...

I've noticed most of cheaper rolled ballscrews use oversided ball bearings to eliminate backlash. However, HomeshopCNC offers a ballnut with offset bearing races to eliminate backlash, which it...

I'm leaning towards the overstock site's LY20 rails+bearing combos. Good price at $334 for 1040mm rail + 4 LY20 bearing blocks (z1 preload), which will be great for the Y-Axis.

Unfortunately...

Couple ideas:

You could experiment with a heatgun or hairdryer to weaken the adhesive bond (if there is one). But I would be very careful there -- you can potentially "cook" the top layer of...

Thanks for the tip on the Z1 preloading.

So the LG series are single bearing race, which is the discontinued model. The more expensive EG series has 4 bearing races. How much "better" are the EG...

Please do try it and post a comparison video -- Loving these clips!

Why don't you pick up some polyurethane foam insulation boards from Home Depot or Lowes (it should be next to the pink extruded polystyrene, but will probably have a foil backing on both sides)?
...

I'm trying to decide between profile rails (LGR20) and round-supported shaft (SBR20). When I priced out my build (about 36"x56", using 80/20 1530 and 1545) I can save about $370 using the round...

Theoretically, a C7 grade ballscrew has 50 μm variation/300mm travel; C10 grade is 4 times that at 210μm variation/300mm.

Over a 1000mm ballscrew travel, that's almost .0275" variation. Can...

I'm pricing ballscrews for my build and really like the Misumi product line; it's easy to customize, generates 3D cad models etc. Misumi offers C7 and C10 grade ballscrews -- for 1000mm assembly,...

Thanks - this really answers my questions. So hard to find clear information on this, when there's no manuals for the Chinese VFDs!

Crane550-- sorry I don't exactly understand what you mean by de-rating if you go with single phase 220 vs 3 phase 220v. Does that mean the 2.2 kw spindle will only produce 1.1kw, using single phase...

Thanks Gerry. -- Looking at the manual for the Keling VFD, it's identical (minus the cover page) to the manual for the Huan Yang VFD sold by cncdiy.com, which makes me think the Keling is just a...

I'm trying to select a spindle for my DIY 8020 build, and have decided on a 1.5kw water-cooled spindle with VFD.

Lot's of retailers seem to be selling the same basic 1.5kw design, but at very...

So I'm planning a new build of a 48x30 cnc router made primarily of 3030 and 1545 series 80/20 aluminum extrusion.

I'd like to use a ballscrew assembly with the MBA style mounting bracket, with...