Thermal printer se bill kaise print kare (USB OTG aur 58mm/80mm setup)

Thermal printer counter billing ke liye sabse sasta aur tez madhyam hai kyunki isme ink ya ribbon ki zaroorat nahi hoti. Bas thermal paper roll lagaya aur secondon me raseed nikal aati hai. Karobari app se mobile dwara thermal printer par bill print karna bahut saral hai.

1. USB OTG Cable se printer connect karein

1. Thermal printer ke saath aane wali USB cable me ek chhota ₹30-₹50 wala USB OTG adapter lagayein jo aapke phone ke charging port (Type-C ya Micro-USB) me fit ho sake.
2. Printer ko power switch se ON karein aur USB cable phone se jodein.
3. Phone ke Settings me jakar 'OTG' search karein aur 'OTG connection' ON karein (kuch phones jaise Realme, Oppo, Vivo me OTG manually on karna padta hai).

2. Android Print Service setup

Android phone USB printer ko pehchanne ke liye print service use karta hai. Google Play Store se aapke printer brand ka print plugin (jaise RawBT, ESC/POS Print Service ya generic USB Print Service) install karein aur phone settings me 'Printing' on karein.

3. Paper Roll Size (58mm ya 80mm) set karein

1. Karobari app me Settings → Receipt setup me jayein.
2. Apne roll ke hisaab se 58 mm (2 inch) ya 80 mm (3 inch) chunein. Isse bill ka format roll ke hisaab se perfect fit ho jata hai aur font nahi katta.
3. Thermal roll dalte samay dhyan rakhein ki paper ka chikna (thermal) hissa printer head ki taraf ho — ulta roll lagane par kagaz safed nikalta hai.

Online thermal printer test slip kaise nikalein?

Apne printer ki paper feed, font alignment aur ₹ Rupee symbol check karne ke liye hamare free online 'Thermal Printer Test Page' (/tools/printer-test) par jayein. Yeh tool bina kisi software install kiye PC ya phone browser se 58mm aur 80mm test slip print karta hai.

Printer na chalne par kya karein?

Agar printer se paper blank nikle to roll palat kar dekhein. Agar print command na jaye to turant bill ko WhatsApp par share karein ya picture dikhayein taaki grahak line me na fase — Karobari me bill phone me pehle se hi surakshit save ho chuka hota hai.