Hey all. I'm trying to put together my Eustathios shopping list,

3D Printing HercuLien and Eustathios
1

Hey all. I’m trying to put together my Eustathios shopping list, ran into this problem with the Misumi lead screws. This line in the BOM:

Lead Screws - One End Stepped Type or One End Double Stepped
MTSRA12-410-S56-Q8

The problem is, that the S value is limited between 3 and 40. S56 is not accepted. Is this a bug in the BOM? Or maybe Mitsumi changed their specs ? Or maybe I am missing something ?

Thanks.

2

Someone else ran into this. I would give them a call for the updated pn#. Once you do let us know and we can update the BOM

3

Are you trying to get it of misumi in eu? They don’t do the specs listed in the original BOM, I had to order ballscrews in China

4

I think misumi may have changed the options available for lead screws. The part # listed in the BOM was correct/available when I initially ordered it earlier this year. If someone is able to get in touch with them (Misumi) or some other merchant who will provide a suitable option, I’ll be glad to update the BOM.

5

@Jason_Smith I think this is it?

MTSBRA12-410-S56-Q8 = $40.89 each

6

@Eclsnowman Looks good. BOM Updated. You the man.

7

Looks like they felt the part number needed a “B”
Not sure what it does, but that’s ok. I don’t want “B” to feel left out. :slight_smile:

8

Yeah, unfortunately that “B” costs another $5 per item.

9

Thanks guys.

10

Hey all, Another question. Why are there 4 different GT2 belts on the BOM? Three from SDP and one from RoboDigg ?

11

Robotdigg ones have a collar, so they don’t work for those locations. But they do in the others and are a lot cheaper.

12

ok, so I understand that all 4 are needed. The lengths in the BOM, are those the exact lengths required ? Is there some spare ?

13

BTW, what exactly is a collar in the context of a GT2 belt ?

14

Sorry. I thought you were talking about the pulleys.

15

Ah, so back to the question of belts, why are there 4 different belts in the BOM ?

16

Because there are different length belts needed. The Drives are run in the bottom area, and tie from the drives via a closed loop belt to the x/y gantry. Belt length to the top x/y bar is a different length than the belt to the bottom x/y bar. Then there is the closed loop z axis belt. Finally there is bulk belt used to tie the x/y axis to the drive pullies. Sdpsi has more selection for closed loop belts, but robotdigg is cheaper for bulk belt.

Hope that helps.

17

Oh, I didn’t realize that the SDP was closed loop. Ok, that makes sense now. Thanks.