head strike when printing pvc

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while printing on rigid pvc the media will not lay flat and head strike occurs. tried messing with media clamps and vacum power and had no luck. any other suggestions

 

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the media is wavy while in the printer how do i stop the media from being wavy

 

[drive]

Flatbed with mercury lamps I assume? Heat expansion.
Try double sided sticky tape. Also try to start printing 6" from the leading edge if this is primarily occuring at the start of the print. This gives a larger area for the heat to disperse.

 

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sorry i should have mentioned that it is a rigid pvc film through my roland xj540

 

[drive]

Ahh! Details details details.
I would still look at your heat settings.

 

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do you think the media is to hot or to cold

 

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tried setting the heat on a lower setting and feeding out more of the media before heating. same result

 

[SightLine]

I HATE printing on that stuff on my Mimaki. When I do I pretty much have to shut the heaters off and set the head hight to thick.

 

[Malkin]

On our vp540 I set the head height to high, and feed the media out about 6-8 inches before printing. Turning the heat up might help, it probably depends on the brand.
I use Sihl 3508 18mil.

 

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yeah high head height is the only way i can see this working i was trying to get away with using low head height and thought maybe someone had a trick or tip to help. thanks for all your input.