Bed not staying hot while printing ABS [SOLVED]

I've been printing PLA fine so now I need some ABS parts... not so easy....

Basically, my bed stays at 135 or so for the first layer and then should drop a little for the rest of the print, but it's dropping a LOT!

Even though M205 is reporting it should be at 130 it drops to around 90 and then slowly creeps back up, like one degree a minute....

I do have some funky starting G-code to push off my 'bed blanket' as getting up to 130 degrees takes forever without it, but there aren't any other M140 commands (other than the 2nd layer drop) that could cause a problem.

Max bed temp is 150 in firmware....

my start code:

; START CODE
M107 ; turn fan off (just in case)
M83 ; use relative distances for extrusion
M140 S130 ; set bed temp
M104 S170 ;MIN EXTRUDER TEMP
G28 ; home
G1 X-19 Y-100 Z27 ;SEND TO BED COVER PUSH OFF
M190 S125 ; wait for bedtemp to reach 125
M140 S135 ; SET TO 135
G1 X-19 Y100 Z27 F2000;PUSH OFF
G1 X-19 Y-100 Z27 F2000;MOVE BACK
G1 X-100 Y-50 F3000 ; Go to the middle of the right side
G1 Z0 ; right to the bed
M104 S245 ; set extruder temp (since this is quicker than the bed)
M190 S130 ; wait for bedtemp to reach 130
G92 E0
G1Z0.05 ; raise a little to the bed
G1 Y0 E5 F200 ; make a thick line to prime extruder
G1 E-0.5 F1200 ;retract a little
G1 X-96.5 Y83.2 Z2.4 F2000 ; move to bull clip
G1 Y90.2 F200 ; wipe extuder nozzle
G1 X-82 Z0.2 F2000 ; move over to the side
; END CODE

image link :[www.dropbox.com]

SOLVED:

Had the fan on 100%, which was overpowering the heated bed

Edited 2 time(s). Last edit at 11/20/2013 03:50PM by Traveltrousers.