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@mactec54 Yep makes sense. Just going to ignore them.

@chopper13 Thanks for the video, great resource. Yeah agree it's not clear. But I can see enough to be comfortable those screws are likely just going into heated inserts and are not tied to anything....

Right, me too. But I am asking about the screw terminals I described in my post.

YAGQ (yet another grounding question). My Huanyang HY01D523B 220v 1.5kw has an additional two grounding screws located outside the normal rows of connecters. There is one on each side, and has a...

Thanks for the info Jim! Good to know it would work.

I live in North America and use split-phase 220V where I can in my shop. I am looking to source a 24VDC power supply, and managed to get myself confused. Most of the DIN mountable power supplies I...

Success! G540 rocks, my Z works perfectly now. Some pics of a circuit board I am working on. Before the Z backlash made this impossible. Notice the spot drills were are all the same depth. Before it...

I should add that with the Z stepper removed and just sitting on the table I ran g0 z500 then g0 z0 and it lost a random amount of steps each time (as much as a quarter turn). Plugging the same...

Thanks for the detail. I will go back through everything you mentioned.

That said, my issue is pretty obvious. The Z stepper motor, even when removed from the machine and sitting freely, does not...

Wanted to thank everyone for their help. Problem solved.

I still have a bad issue with loosing steps on the Z, but narrowed it down definitively to a bad driver on the YOOCNC-NT65-3X. Adding...

I should also point out the belleville's inner hole diameter is larger than the bearing's inner race diameter, so there is no way for it to touch the inner race even at full (flattened) compression...

I wonder if maybe the picture didnt make it clear. The bowl of the belleville is down, not up. So the belleville is contacting the outer race, not the inner. Here is a drawing.

220808

Do you...

Ok found a local supplier that had a Belleville spacer the perfect size, at least for how I am using it. Solved the problem perfectly (or at least the symptom). Can someone confirm this will work...

Would a preload spacer be something like one of these? http://www.mcmaster.com/#standard-disc-springs/=qfwvgw


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Finally got around to taking it apart tonight. The ballscrew is not threaded at the top (drive) end, and has no lock nut. The bearing just sits on the shaft, and the pan head screws hold it down in...

Thanks for the tips Bob. That gets me pointed in the right direction. The bottom bearing does appear to be locked to the ballscrew shaft (as evidenced by the bearing popping up and down). I will lean...

Gotcha. Good to know.

So assuming its bad design, could someone give me pointers on what I need to buy to make it better? Dont need specific sizes and such, just need to know what kind of parts I...

Thanks for the input. So wondering what I should do in my case. I guess I need to start be disassembling the assembly to see what I have. atm I am not sure if something is broken, missing, or just...

Would the issue be with the diameter of the shaft? I have zero lateral movement with the shaft in the bearing. Seems like if it was too small for the bearing it would wiggle side to side. Or am I not...

fyi The coupler I have looks like this style sold separately on eBay 10x 10mm Flexible Jaw Clamp Shaft Plum Coupling CNC Stepper Motor Coupler D25L30 | eBay. Oddly only one of the couplers on the 3...

Thanks guys, that got me pointed in the right direction. I may have just solved the problem (or maybe I just covered it up?). I realized that the up down motion on the shaft must have been happening...

Just took my Z stepper off so I could have a better look. From what I can tell the top bearing is not moving, but the ball screw has a ton of movement inside it. I took a quick video.

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I have a 3040 style ebay machine. I am new to CNC so not sure if this is "normal" or not. If I lift up on the spindle mount the bottom ballscrew bearing will pop up about 1.5mm. If I push back down...

Keep us posted. Interested in your progress. My 3040 with the same stock controller you had will be here next week.

Good to know the stock setup can be tuned to work well. I definitely planned to get it working and understand its weaknesses (if any) before I thought about upgrading stuff. I had just read a few...

Just purchased a 3040Z-DQ off eBay. Knowing all the issues everyone has with the controllers and whatnot, I was thinking about purchasing this shortly after getting its setup...

Thanks for the feedback. So do these units have a VFD (you mentioned that in your comment)? Im new to this. Because it didnt say it on the spec page I assumed it didnt. Plus unlike the ebay listings...

This is my first post on cnczone. I posted this once already, but somehow I managed to screw something up editing it and it disappeared. God help me with a CNC machine heh.

Was hoping to get some...