Quality wire source?
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I missed the 24 ga part of your post.
I typically use 22ga and higher.
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@bricor said in Quality wire source?:
I missed the 24 ga part of your post.
I typically use 22ga and higher.
The Amazon NEMA cables are even 26
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Like @bearer mentioned, silicone servo wire
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If you don’t find what you need in 24ga, Openbuilds has lightweight 22ga 2,3 and 4 conductor (sheathed) cable. Its good copper wire. The diameter of the 4 conductor canle i have is 3.3mm and the diameter of the inner wires measure 1mm each. Its nice flexible stuff. Works well with crimp connectors of many types, DUET included.
The wire colors are red, green, yellow, blue
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Have you considered buying spools of wire and making your own cables? It isn't very hard to do and you get complete control over the quality. I like teflon insulated wire because heat from a soldering iron doesn't melt it (unless you really abuse it), but you need a good quality stripper to use it. For motor leads, I twist pairs of teflon insulated wires, then crimp on connectors or ferrules as needed. You can twist wires using an electric drill.
Finally, making cables that don't have to be moved a lot can be done by braiding the twisted pairs (example- motor and end stop for the Z axis). You can braid any number (>2) of wires or twisted pairs together and then you don't need any wire loom or other cover.
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@mrehorstdmd said in Quality wire source?:
For motor leads, I twist pairs of teflon insulated wires
I like to flat-braid my motor wires!
Ian
TronXY X5S with Duet 3 MB6HC and Roto toolboard : Cartesian bed-slinger with Duet 3 Mini 5+ WiFi and 1LC : RRP Fisher Delta v1 with Duet 2 Maestro : Polargraph with Duet 2 WiFi
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I ordered all the stuff to build cables myself. I got the crimps and stuff from https://americas.rsdelivers.com. I got some "tinned copper silicone" hookup wire on Amazon. Fingers crossed there is actual copper in the wire.
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@droftarts twisting the individual pairs helps prevent EMI by controlling the magnetic field produced by motor currents in the wires. It also helps prevent inductive coupling between the relatively high current motor wires and sensitive inputs like thermistors and endstops that are often running along side the motor cables.
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@mrehorstdmd Yup, and braiding does the same thing, as the wires twist around each other (and the other pair, but that doesn't matter as we're not transferring data at high speed like in Ethernet cables). The twist doesn't have to be very tight, 5 to 10 turns per meter is sufficient. See https://medium.com/@emianalyst/effect-of-cable-twisting-on-radiated-emissions-66edb16bec1c
Ian
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Just a followup. I find the stepper connectors to be very tedious and fidgety to crimp, and assemble. The wire I ordered "seems" to be a decent quality. I did not have a single failed cable connection. It was annoying that the end stop switches were 2.54mm pitch and the steppers were 2mm pitch. I failed to notice and had to order more stuff to complete the work. I forgot at the last minute to add the wire twist to the motor cables
So far everything seems to be working. And for the first time since I got the Precision Piezo Z sensor I have reliable operation. The wire I used was sketchy and it caused many crashes into the bed. I also beefed up my bed mounts using Materhackers Ryno. All in all my CoreXY is a far better machine than ever before. Now I'm dealing with issues surrounding going to a .6mm nozzle. My CoreXY is my larger format 300x3 printer. My Ender is my 200x3. I had the worst nozzle blockage I've ever experienced AFTER I realized the hot end cooling fan wasn't running. This was the first time I have had to resort to a butane torch to clear the blockage. Joys of the hobby. -
Good to hear progress. One hurdle at a time. Keep us posted!
