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The main advantage of using separate Limit switches is that you are protected while Homing. When the switches are shared for both Homing and limits then Limits are Ignored While Homing so it's not...

I think design is a bit of a strong term to apply to my machine. I bought it from a company in Devon!. It came with proximity switches to act as homing reference only. These were mounted axially and...

A proximity switch is a type of switch. A limit switch is a designated use of a switch. Limit and Home switches can be either electronic, like a proximity switch or mechanical, like a microswitch.
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Yep. Shielded 4 core CY for each stepper motor with the shield grounded only at the cabinet end, not connected to the motor.

The CY goes between the motor and the driver, carrying the A+ A- B+ B- rather than step and direction.

In the electronics cab between the breakout and the driver you want something like CAT5,...

No problem - if it helps my four core CY cable (1.5mm2) is about the max you can use with the 2.2kW water cooled spindles before the GX20 plug becomes silly to solder on, and it's overkill in terms...

Bangood has a host of sizes available up to 25 x 77mm at minimal cost. I think I got the 15 x 40 for my machine and have all the cables inc spindle power and cooling hoses in there.
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I think the advice I found was aim to fill no more than 60% - so I measured the diameter of each cable I intended to run through, and then treated them as squares to provide a safety margin (so an...

https://www.ebay.co.uk/itm/R38-18mm-x-37mm-Black-Nylon-Flexible-CNC-Semi-Enclosed-Cable-Drag-Chain-1M-UK/163618534489
I have this on mine. I have two on each axis to get enough room and to keep...

I JUST managed to squeeze everything into 15 x 30, but it did require a bit of laying in to make sure stuff wasn't crossing over anywhere.

In my experience, wider is much easier. You can run out of room fast.

An important consideration is bend radius. You don't want too small / tight radius as it's bad for cables (radius needs to be...

Hi Chilly,

Yea I think that's a good price for the Leadshine DMA860H drivers and offers room for a bigger PSU output in the future, for the 80v drivers around 70v is a good target for the output...

In post 10 ,the second link for the
"Soft-start, inrush current limiter for toroidal transformers-assembled, tested"

reminded me of project 39 from Elliott Sound Products
Soft-Start Circuit...

The second one looks like a bit of a home project, TBH. The first (German) one looks pretty sensible, containing an NTC, timer relay and overtemp protection.

Keep an eye on it under load, but there's many toroidal running with just NTCs - that's what they're designed for. If it works - you've saved yourself £40.

(Mine has just an NTC on a 800VA...

what about those soft starters for the toroidal transformers ?

www.ebay.ie/itm/Inrush-current-limiter-230V-16A-for-transformers-power-supplies-LED/231650038237
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No, it's because RS Pro is an "in house" brand which by definition is less expensive than a main line industrial product. The cost difference between 6A and 16A contacts is only a small part of the...

They look pretty good. I don't think RS sold those when I did mine. I used a Finder one which costs more https://uk.rs-online.com/web/p/timer-relays/0221086/

Yes, that's how they work. The nice...

Often a good idea to do so. However, you may find that every so often you trip the breaker when you switch the power to a transformer. It's not usually due to the capacitive load so much as the...

Looks about right to me.

I used a 5A unit on all my builds without issue.

According to the manual it says power consumption is 5W so about 0.2A I would use a 5A PS in case you want to power other things in the control box

https://www.rapidonline.com/50a-bridge-rectifier-metal-case-519318 1 No.

https://www.rapidonline.com/samwha-hc2a478m35040ha-4700uf-100v-85deg-hc-snap-in-capacitor-11-3121 3 No.
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Many thanks. Great stuff.

When soft limits are turned ON then Mach will give a Soft limits warning when you press cycle start if out of limit range.