Velleman Vertex Delta K8800 print bed heater project

Heating bed for the Velleman Vertex K8800.

I didn't want to change the printer unnecessarily, so I placed the heating bed under the original printing plate.

The heating is a 12V 50W 100x100 mm heating pad, which is supplied with voltage via a temperature controller and a downstream Mosfet module.

The aluminum heating plate is positioned with approx. 0.2 mm air under the original glass plate, which means that the automatic print bed calibration is maintained and no print space is wasted in height.

After the first tests on the piezo pressure transducers, I cut a hole in the middle of the upper rubber support so that the support is now ring-shaped.

This has made the piezos more sensitive to pressure and so far there are no more problems with the auto calibration (tested up to 60° so far)

So far good to very good adhesion with PLA at 55° bed temperature.

The controller is a two-point controller set with a hysteresis of 0.1 °.

(W3230 LCD 12V Digital Thermostat Temperature Controller Meter Regulator XRMO)

I used a small switching power supply with 12V 4.7A, plus the Mosfet switch "3D Printer Mosfet Heated Bed Power Module MKS for Anet A8 A6 A2 Prusa i3".

Material is available cheaply on Ebay, everything fits into the customized radio housing (thing:3193189).

https://www.thingiverse.com/groups/vertex-k8800

Addendum 08/2021:

New housing design at https://www.thingiverse.com/thing:4930796

Heating bed for the Velleman Vertex K8800.

I did not want to change the printer unnecessarily, so I put the heating bed under the original pressure plate.

As a heater is a 12V 50W 100x100 mm heating pad, which is powered by a temperature controller and a downstream Mosfet module with voltage.

The aluminum heating plate lies with approx. 0.2 mm of air under the original glass plate, thus the automatic pressure bed calibration is maintained and no pressure chamber is given away in height.

At the piezo pressure transducers I have cut a hole in the rubber after the first tests of the upper rubber pad still in the middle, so that the pad is now ring-shaped.

As a result, the piezos have become more sensitive to pressure and so far there are no more problems with auto calibration (tested so far up to 60 °)

So far good to very good adhesion with PLA with 55 ° bed temperature.

The controller is a two-position controller set with a hysteresis of 0.1 °.

(W3230 LCD 12V Digital Thermostat Temperature Controller Meter Regulator XRMO)

As power supply I used a small switching power supply with 12V 4.7A, in addition the Mosfet switch "3D printer Mosfet Heated bed Power Module MKS for Anet A8 A6 A2 Prusa i3".

Material is cheap on Ebay, fits everything in the adapted radio housing (thing: 3193189).