Spec sheet for Rostock steppers?

Here's where you can find the official (and unofficial too) things like assembly instructions etc...
mikew67
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Spec sheet for Rostock steppers?

Postby mikew67 » Fri Jul 01, 2016 4:18 am

Hi folks,

Can anyone give me the make and model of the steppers that SeeMeCNC is supplying in their current Rostock Max v2 kit (which they call "Our P/N: 26504 - UPC: 834537001021")? What I really want is the spec sheet, so I can determine whether some steppers I currently have are suitable substitutes.

TIA,

Mike

PS: BTW, is there an "official" (and complete!) BoM? I've seen some attempts at same by other members, which leads me to believe there isn't. I've even attempted that myself, pulling together info from the four "hardware kits" listed in the assembly manual, but that info appears incomplete.

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Re: Spec sheet for Rostock steppers?

Postby geneb » Fri Jul 01, 2016 8:09 am

The BOM in the manual(s) come straight off the packing lists from the kits, so I have a hard time believing they're incomplete. :)

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Re: Spec sheet for Rostock steppers?

Postby mikew67 » Fri Jul 01, 2016 8:59 pm

Thanks, Gene, for the quick reply. And for the very detailed assembly manual (latest PDF generated 5/27/16). Lots of assembly details, but unfortunately not the spec info I need. Your "visual BoM" shows a picture of the steppers and the text:
(4) NEMA 17 Stepper Motors (4800gcm holding torque). Used for three motion axes and extruder drive. [26501]

The SeeMeCNC webpage for their part number 26501 doesn't give much more info (other than listing a holding torque of 76in-oz (vs 66in-oz, which the above g-cm value converts to). I really would like to get more tech info to aid my design efforts, including in priority order:
  • Coil impedance and max current (probably around 2A).
  • Motor length (presume 48mm) and other dimensions
  • Motor rotational inertia
  • Motor bearing type and max loads (radial and axial -- former important as it limits belt tension).
  • Etc.
Something that's hard to get, even in factory spreadsheets, is detailed magnetic behavior, i.e., saturation and micro stepping linearity, which usually requires testing of actual units (so brand and model can be relevant).

So if you can recommend typical brands and models, that would be very useful.

Mike

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geneb
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Re: Spec sheet for Rostock steppers?

Postby geneb » Sat Jul 02, 2016 10:32 am

I don't know anything more about the steppers than you do - the description was taken straight off the BOM that was included in the kit I used. If you need a data sheet for the stepper, I can just about guarantee you'll get one if you contact them directly (and they have one). Email support@seemecnc.com. Keep in mind that I'm in Washington State and they're in Indiana, so it's not like I can just throw a wad of paper at John and yell, "Gimme a spec sheet!" :D

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Re: Spec sheet for Rostock steppers?

Postby mikew67 » Sat Jul 02, 2016 6:02 pm

Thanks, Gene!

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KAS
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Re: Spec sheet for Rostock steppers?

Postby KAS » Sat Jul 02, 2016 8:36 pm

My original steppers have a sticker on them " Kysan 1124090 7951"

Datasheet shows 5.5 kg cm or 76ish oz in.
http://www.kysanelectronics.com/Product ... ordID=7850

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Re: Spec sheet for Rostock steppers?

Postby mikew67 » Sun Jul 03, 2016 5:03 pm

Thanks, KAS!

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Re: Spec sheet for Rostock steppers?

Postby zeplin » Wed Aug 10, 2016 4:57 pm

Not that KAS incorrect about the motors it seems that seemecnc uses more than one supplier. Per an email replied on May 26, 2016:

Spoiler:
Hey MyName,

Thanks for contacting us. The current RAMBo's are 1.3L's, the most current version from UltiMachine. We only use genuine UltiMachine boards, no knock offs. As for the motors, they are 42BYGH811's, and have been our standard motor for years on all max kits and will continue

Thnaks!

On Thu, May 26, 2016 at 10:24 PM, Shopify Notification <mailer@shopify.com> wrote:
Contact Form Submission:


Body: Ma'am or Sir,

I am looking in to the Rostock Max v2 printer and I am trying to see if i can future proof some upgrades that i will eventually do the the printer. I will be picking up one of the printers in the next few weeks.

I am trying to establish what version of RAMBo board is being used and what NEMA 17 motors are supplied? I plan to run 24 volts to the system and the motors to me seem to be the only unknown for supply requirements.

The RAMBo version i have seen that have been shipped in the past have been 1.2's i believe base on pictures that i have seen

The BOM is ambigous on the motors and the board.

Thank you,

R/s,
MyName


The motor number given was 42BYGH811 which led me to Wantai Motor. The email did not list a supplier so I may be incorrect on the asumption that this is the manufature of the above part number. Below it the link to the part number:

As a note for some reason Chrome takes a realy long time to load ther page so long sometimes it times out.
http://www.wantmotor.com/product/42byghw.html
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