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Don't underestimate the amount of de-ionised water you need. You have to use copious quantities of it at every step to keep the parts clean, else you'll see white deposits appear on the parts at the...

I have no recollection of this incident, though I can say that 7 years later all the 3Nm motors I have from Zapp and CNC4You are still working well.

I agree with Clive on not dismantling without...

I still use it most weekends. It's a surprisingly good machine for the size, I think due to having substantial bed slides then for example an X3. If you're looking for a machine to fit on a...

Try it an see - 50 meters is not a hard limit. You could test with a multi-meter how the existing cable is wired, but to extend it all you need is a cable that connects pin 1 to pin 1 ... pin n to...

Post it to me with the nut you want to use and I'll cut the thread on my lathe for the price of return postage.

Edit: Sorry I'm retracting that offer - I don't think this will help you as much as...

Another thing to play with is adding or subtracting turns from the transformer to tweak the voltage. But I wouldn't recommend that by design, only if you the insulation materials and enameled wire...

I've made a handful of these bridge rectifier PCBs for connecting with toroidal transformers to make PSUs ideal for stepper motors.

20115

20116

They have two 10,000uF 100V capacitors in...

I agree with Clive on this point. Rotating nuts only start making sense if the axis travel you want is over about 1.6m and start looking like the best option at around 2m. Otherwise they're just...

7 days until we leave for the TT...

18479

Easiest way is just to anneal the end of the screw. Heat up the end and wrap a damp cloth round slightly further back to stop most of the heat conducting down the screw.

If you're careful you'll...

Briefly in post #18 - I'll be getting TBI brand ballscrews with DFU nuts, C5 grade with preload. I have already put one of these on Z. For the diameters, likely 20mm on X and Y based on the stiffness...

A split point drill bit should help you - e.g. http://www.arceurotrade.co.uk/Catalogue/Cutting-Tools/Twist-Drills/Drill-Bits---Cobalt

Ok, broken tap situation resolved...

I intend to buy the fasteners I need for this tomorrow, so time for some rough calculations to check what grade I should use. From the THK documentation, I...

For a CNC router, like you're building, I would go for 'ZA' (medium) preload. Preload results in higher stiffness for the bearing, at the expense of reducing the life and increasing the driving force...

The spec. for HTD belts say make sure to have 5 teeth engaged. This is based on ensuring that with a sufficiently high load, the belt will snap instead of the teeth ripping off. This hardly matters...

If you take the belt off the Z-axis and give it a slight push, does it start moving down by itself due to gravity? If not then your ballscrew and or rails may not be aligned well.

To increase the...

I recommend checking with a multimeter what the resistance it between each of the pins, as who knows if the companies making these spindles are consistent. You should get a couple of ohms between the...

The type previously often seen on Chinese spindles is nice and compact - namely GX16 connectors. See my post here:
...

Here you go ... I was preparing some cables:

http://www.mycncuk.com/attachment.php?attachmentid=15440&stc=1

I may have something suitable spare - I will check this weekend when I'm home. In the quite likely event that I forget and don't post here on Saturday, please remind me!

Slightly off off topic, but have you considered getting the PCB manufactured? It's pretty cheap in China.

You can get riveting tools to use as a method for making vias in PCBs, but they're too...

He was referring to post #64 ... had to Google search the forum to find out!

I was referring to stepper drivers. You do need one per motor, but my point was you don't have to use the same driver for every motor. There are arguments for getting different drivers for slaved...

Not quite - the spindle will draw more current as the tool driven into the bed, but once the motor speed is very low, or it has stalled, the input power required for the VFD to get the motor to...

You should be able to find examples on this forum - plenty of us have made that mistake!

Two ways I've found that work well:

1) Put grease on the balls to stick them to the nut, then gradually...