Magnum Venus Plastech Megaject RTM Pro Revison 7_0 User Manual
Page 39
Megaject RTM Pro Manual – Revision 7.00 – 13
th
APRIL 2006
4.4. Resin Alarms
The resin alarms configuration screen is shown in Figure 4.4.
The Resin Gel Alarm (RGA) is used to warn the operator of the possibility of mixed
resin and catalyst gelling in the mixing head. When an injection has been commenced,
if a complete pump stroke is not registered in the time specified by the RGA timer
value, an alarm is raised. This value must be set by the user based upon the type of
resin system being utilised, and the gel time of that system under the operating
conditions in which the machine is put into use.
Figure 4.4 – Resin alarms configuration screen
If required, an external resin level sensor may be connected to the machine, to prevent
an injection from being started if insufficient resin is available. This feature may be
enabled or disabled by toggling the resin level sensor button.
The injection start warning time, is a value in seconds that specifies the elapsed time
after the injection start button is pressed, before the injection starts. This is provided
as a safety feature to warn operators that the machine is about to start and during this
time the sounder beacon operates.
4.5. Head Pressure Clipping
Head pressure clipping is provided as a safety feature to prevent the pressure at the
mixing head from remaining at an unsafe limit. This option protects the supply line to
the mould by removing power from the pumps when a maximum level is reached and
is predominately used in mould pressure control mode. However, if enabled the
function also limits the line pressure in the head pressure control mode.
The head pressure clipping enable/disable button, which is shown in Figure 4.5 can be
toggled to control whether head pressure clipping is active.
If the clipping is enabled, the head pressure clip value specifies the maximum
pressure in mbar, which should be delivered at the mixing head.
The deadband value is used to set the value to which the head pressure must fall in
order for power to be reapplied to the pumps. To determine this lower value the