Hi Murray,
We convert JV33s and JV5's from solvent to dye sub pretty often. We always replace the cap, top dampers, and pumps prior to loading the dye sublimation inks into the machine after flushing the machine out with the following:
1. cleaning fluid
2. air
3. acetone
4. air
5. isopropyl alcohol
6. air
7. change the dampers, captop, and pump
8. dye sublimation ink
There is about a 50/50 chance the head will make the conversion depending on the condition and age of the head. We have had better success with heads that were a few months old over a few years old. We also disconnect the lines from the damper in order to flush them as opposed to running the fluid through the head and dampers. Then we carefully flush the print head with a syringe manually using cleaning fluid/air, then acetone/air until we don't see any color coming out of the head with the flushing fluid and then let the acetone evaporate before attempting to flush it with alcohol.
Good luck!
Brian Hendricks
American Print Consultants
Business: 818-9-APCINK(27-2465)
Cell: 419-552-0194
Email:
brian@apcink.com
Website:
www.apcink.com