Centroid Community CNC Support Forum

Uwe:
I take it the two caps and resistor are similar to the attached lower circuit diagram? And thanks Nigel.

All you need is a single 0.1uF non-polar capacitor across the two pins of H8.

tblough wrote: ↑Tue Jun 14, 2022 8:54 pm All you need is a single 0.1uF non-polar capacitor across the two pins of H8.

Agreed, don’t over complicate things, just add a single cap. Then look at grounding the shielded wire.

yes, the lower diagram worked best for me.

Uwe

just put the cap across the Vout and COM (COM should be GND) on the driver side. You dont need a resistor because the wires will have enough impedance on their own unless really short. Also, we dont need a ton of filtering here unless your enclosure is exceptionally noisy

What kind of cable are you all using as twisted-pair-cable?
The only shielded, twisted pair-cables i know are ethernet-cabbles?

https://www.automationdirect.com/adc/sh ... gnal_cable

https://www.alliedelec.com/view/search? ... 2024%20awg

https://www.helukabel.com/us/products/p ... 21001.html

Spartan117 wrote: ↑Wed Jun 15, 2022 4:24 pm What kind of cable are you all using as twisted-pair-cable?
The only shielded, twisted pair-cables i know are ethernet-cabbles?

I dont know what he is using,
but you can get thicker gauge twisted pair shielded cable by the foot from places like automationdirect

If you are talking about VFD cabling, I used automation direct: Southwire VFD cable, 4 conductors (includes ground), 16 AWG, cross linked polyethylene (XLPE) conductor insulation material, overall foil and braid shielded, TPE jacket,

cncsnw wrote: ↑Wed Jun 15, 2022 4:59 pm https://www.automationdirect.com/adc/sh ... gnal_cable

https://www.alliedelec.com/view/search? ... 2024%20awg

https://www.helukabel.com/us/products/p ... 21001.html

Ah, that did it, Helukabel is a german manufacturer, so I could just switch to the german homepage and find out how that cables are described here in germany.
Thank you very much!