Hi all, need some help, ive had to extend my cable on my laser and im having power issues, i have a lead 1510 cnc from openbuilds with a laser tree 80w aa pro 10w optical laser engraver, tonrun a cable tbough my cable chain its approc 5m in length, im using some 3core shielded 0.5mm2 cable but worrried due to the length im getting a drop over this length.
Should i increase cable size to 0.75 or even 1mm 20/18 AWG?
Is it 12 or 24 volts for your diode?, at 12 volts I will probably use 1 mm2, then you are up to 5 meters and 2 amps on the safe side.
You can also use a clamp ammeter to measure how much you actually draw. It is also important to know how large a voltage drop can be accepted. If I remember correctly it is 4% in cars, but I would not like that for electronic parts.
Most wire resistance is measured in 1km or 1kft. If you pick up one of the many wire/size current use wire guides it’s probably laid out what you need to use…
5m is quite a ways to go… How large is your machine?
An 80W module at 24V requires ~3.3A, for 12V double that for the same wattage.
Make sure to adjust for length…
thanks for the info, i have a 1500x 1000 cnc, but have to double up through the drag chain and then back to mmy controller.
great thanks for the infrmation, my diode is 12v
Jamie, as Jack said without knowing the amp draw on the laser and if it was an easy change out, I’d swap for the 18 AWG stranded wire. Then see if that makes a difference. If not, then you know it isn’t a voltage drop issue that is causing you power issues.
Why is this?
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