Applying a corrective voltage
In one example, a method is described that includes a processor detecting a voltage of a photoconductor layer of a printing device, comparing the voltage of the photoconductor layer to a threshold voltage, and applying a corrective voltage to a charging unit or to a transfer member when the voltage of the photoconductor layer exceeds the threshold voltage.
1. A method, comprising:
detecting a voltage of a photoconductor layer of a printing device;
detecting an improper grounding of the photoconductor layer by comparing the voltage of the photoconductor layer to a threshold voltage; and
when the voltage of the photoconductor layer exceeds the threshold voltage, applying a corrective voltage to a charging unit.
2. The method of claim 1 , wherein the voltage of the photoconductor layer is detected between an erase operation and a charging operation.
3. The method of claim 2 , wherein the erase operation is performed by a pre-transfer erase (PTE) unit.
4. The method of claim 1 , wherein the voltage of the photoconductor layer exceeding the threshold voltage is caused by a fault in a pre-transfer erase unit.
5. The method of claim 1 , wherein the voltage of the photoconductor layer is detected via a non-contact voltage measuring unit.
6. The method of claim 1 , further comprising: presenting a notification that the voltage of the photoconductor layer exceeds the threshold voltage.
7. The method of claim 1 , further comprising: presenting a notification that the voltage of the photoconductor layer has been reduced after the corrective voltage is applied.
8. The method of claim 1 , wherein the corrective voltage comprises a ground voltage.
9. A device comprising:
a processor; and
a voltage measuring unit to provide input to the processor;
the processor to register a voltage of a photoconductor layer of a printing device prior to an erase operation and subsequent to a charging operation and apply a corrective voltage when the voltage of the photoconductor layer exceeds a threshold voltage.
10. The device of claim 9 , wherein the voltage of the photoconductive layer is detected between a pre-transfer erase (PTE) unit and a charging unit.
11. The device of claim 9 , wherein the corrective voltage is applied to a transfer member for transferring an image from the photoconductor layer.
12. The device of claim 11 , wherein the transfer member provides a discharge path for a charge on the photoconductor layer.
13. The device of claim 9 , wherein the corrective voltage is applied to a charging unit of the photoconductor layer.
14. The device of claim 9 , wherein the voltage measuring unit is a non-contact voltage measuring unit.
15. The device of claim 9 , wherein the corrective voltage comprises a positive bias voltage.
16. A method, comprising:
detecting a voltage of a photoconductor layer of a printing device, wherein the voltage of the photoconductive layer is detected between a pre-transfer erase (PTE) unit and a charging unit;
comparing the voltage of the photoconductor layer to a threshold voltage;
applying a corrective voltage to the charging unit for charging the photoconductor layer or a transfer layer for transferring an image from the photoconductor layer; and
providing an indication to a user that the corrective voltage has been applied to the photoconductor layer and it is safe to open the printing device.
17. The method of claim 16 , further comprising applying the corrective voltage to a charge roller when the voltage of the photoconductor layer exceeds the threshold voltage, wherein the charge roller provides a discharge path for a charge on the photoconductor layer.
18. The method of claim 16 , wherein detecting the voltage of the photoconductor layer is performed between an erase operation and a charging operation.
19. The method of claim 16 , wherein the corrective voltage comprises a ground voltage.
20. The method of claim 16 , wherein the corrective voltage comprises a positive bias voltage.