My Simple looks like a dead horse. Finally decided to try and swap parts to switch over to GT2 belts on X axis.
What a task, requires nearly full disassembly.
Fortunately motor mount that holds bearings was a near perfect print cause there’s no wiggle room for size discrepancies. Hopefully will finish tonight but have to admit I was trolling PB’s site looking for that all metal printer… 
Ive printed my parts out to do this just waiting on skate bearings. Now I’m thinking while its that stripped down I may as well increase the bed size
I went through the same pain, but with iamjonlawrence’s smaller belt design. It’s worth it.
Next up: Extended X with GT2 belts, then extended Y with GT2 belts. I’m going to keep the stock bed, but use the full size.
@Nigel_Dickinson
Where are you located? I have some spares I could send.
I’m using this remixed version of the bed extender:
I had already done the bed extension (220 mm) so figured the least path of resistance would be to use this remix. I’d printed the parts back in Jan but never got around to doing it, but now I see there are several other different GT2 upgrade iterations.
@Carlton_Dodd I’m in the uk.
Thanks for the offer though. But I’ll be fine.
Most of my upgrade parts are donations for printing things up for others.
But the simple is more fun than my Huxley as its more hackable.
Nice 3d printing
thx @PUNJI_LAL_MEENA , when it’s fully calibrated and happy, the prints can be pretty nice. These parts were done slowly at .2mm at like .25’ish infill.
Looking to get those parts printed for mine as well
Made the mistake of cutting my line to short on the X, and the replacement (200 lb line) just doesn’t want to play nice
can I ask the specs on the bearing & gear?
@James_Harrod , I picked up the GT2 kit from Printrbot’s site, which is a 20 tooth pulley. The bearings are the typical 608 skateboard bearings (I actually popped them out of a set of unused inline skate wheels).
@Tim_Sills thanks for the info… I got a colleague to print the needed parts for me, and just ordered a pulley kit & some bearings
with luck this will stop the slippage and I will be able to use my printrbot simple to it full extent
now to save up for the new hot end heads for it
I’ll post up pics tomorrow but the job’s done and the printer is busy making new parts that are coming out great. Just printed LED holder and now doing lower extruder tension parts to eliminate old fan holder.
Calibration was straight forward and X-axis steps went from 88 to 80.
I had to do some minor edits to the lower bed holder cause it was barely touching the pulley. Fortunately I have a belt sander and I took about 1/16" off the inside edge.
I’ll do a full write up tomorrow cause there were a few items you should do while assembling cause otherwise you’ll have to take it back apart…for example you’ll realize that the bearings and pulley should go on the face plate before installing into the printer base (ugh).
Love it!!
