Hello Kumar,
Good morning to you. How are you today?
I am Sherry from Jinan SUKE Science & Technical CO.,ltd specialized in Laser machine & CNC Router with more 6 years' experience.
So glad that i could help your laser machine.
1. About Laser does not stop firing: i think you set the engraves times, not only 1 times, maybe 2 times or 3 times. Please check it in your software.
2. About the engrave front or background, the reason you choose the positive engrave or negative engrave. so It cause the effect.
By the way, how is the control card, Leetro card or RD card, & which version. so that i send the specific solve problem for you.
If you do not know the control card version, please send me a clearly picture of control card & Panel.
Please be free to send mail to me.
Email:sales8@sukelaser.com
Skype:sukelaser08
MSN:sukelaser8@hotmail.com
Mobile:0086-18668917435
Best regards
Sherry