Kern-sohn VFS 2T1 Addendum Manual do Utilizador descarregar pdf (Página 12)

EPM205 - Technical reference - Rev. A Page 12

Advanced Printing Systems

3.9. Operating precautions

1- When performing continuous printing, the supply energy should be reduced so that the substrate

temperature, monitored through the thermistor, will remain below 65°C.

2- All strobes signals must be disabled during the power and logic voltage ON/OFF sequence.

3- Do not touch the connector pins with naked hands.

4- The print-head substrate surface is coated with glass, for this reason, mechanical stresses, shocks, dust

and scratches should be avoided to prevent damage.

5- When the print-head operation is completed, print supply voltage (including the charged voltage with

capacitor) should be reduced to the ground level and maintained until next print-head operation.

6- Avoid condensation, if condensation occurs, do not switch ON the print-head power, until condensation

has disappeared.

7- When plugging in and out of the connectors, avoid using excess force as damage may result (Plug in-out

cycle for this connector should not exceeded 20 times). Do not pick up the mechanism by the connectors.

8- Print quality would become degraded if paper or ink residue were stuck on the heat element area. In this

case, clean the print-head with an applicator and alcohol. Do not use the sandpaper as this will destroy

the heating elements.

9- If sticking sound, is heard while printing, please check and adjust the paper feed mechanism and the

electrical pulse program to eliminate the sound.

10- Make sure the paper does not have high abrasion factor, low sensitivity or abnormal chemicals.

11- To avoid surges and voltage losses, a 47 mF aluminium capacitor between VH and GND is necessary on

customer’s controller board side.

Important precautions

To prevent any dot element damage:

At power up make sure that logic voltage (Vdd) is present simultaneously or before VH.

At power down make sure that VH is at 0 V before removing logic voltage.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 28 29

Sem comentários

Kern-sohn VFS 2T1 Addendum Manual do Utilizador Página 12