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Super size purse i3?

Posted by rich1812

rich1812

Super size purse i3?
January 25, 2016 11:03AM

Registered: 9 years ago
Posts: 133

Hi, I have the purse i3, I am thinking of the increasing the print area to 10"x10" by modifying the current one(8x"x8".) Needless to say, the X and Y rods would have to be longer and the middle frame would have to be enlarged, and I suspect the Marlin firmware would also needs to be tweaked.Other than that, what else should I take into consideration? Thanks in advance.

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Dust

Re: Super size purse i3?
January 25, 2016 12:35PM

Admin
Registered: 13 years ago
Posts: 6,998

not sure on what length it becomes an issue, but 8mm smooth rods move to much, consider 10mm

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DaGameFace

Re: Super size purse i3?
January 25, 2016 01:25PM

Registered: 8 years ago
Posts: 318

Should be really easy to change the firmware. Think there are just two variables you need to change that say x and y size.

Aside from that, maybe more lash in your belts if hyouhave go really big, but don't think that this small jump should be too noticeable.

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rich1812

Re: Super size purse i3?
January 25, 2016 01:44PM

Registered: 9 years ago
Posts: 133

Thank you all for your replies.
I also find this place where sells the 10" hot bed. [3dtek.xyz].
No surprise that it would draw more power, but it seems doable.

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bryanandaimee

Re: Super size purse i3?
January 25, 2016 04:26PM

Registered: 13 years ago
Posts: 632

May end up needing a more powerful stepper for Y since the bed will be bigger and likely heavier.

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gmckee

Re: Super size purse i3?
January 25, 2016 05:10PM

Registered: 9 years ago
Posts: 182

Also that heated bed says it will draw up to 18a@12v. Assuming you are running a traditional controller the bed probably would need an SSR with heatsink to control the power. 18A is over what most of the connectors, fuses, MOSFETs, and other electronics on controllers can handle. You may also need to get a larger power supply rated at 30a@12v to power bed and electronics.

Prusa i3 Rework - Ramps 1.4 - E3d Lite6 - Full Graphic LCD Controller

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elwood127

Re: Super size purse i3?
January 26, 2016 01:58AM

Registered: 9 years ago
Posts: 705

This may help. My rework of the x carriage using 10mm rods and long bearings and x belt adjuster. A linear slide might be worth looking into also.
[www.thingiverse.com]

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dc42

Re: Super size purse i3?
January 26, 2016 03:25AM

Registered: 10 years ago
Posts: 14,672

For a heated bed of that size, you would be better off using 24V power and 24V-capable electronics. Then the electronics will be abe to drive the bed directly, and you won't need such thick wires to it.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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rich1812

Re: Super size purse i3?
January 26, 2016 09:51AM

Registered: 9 years ago
Posts: 133

Quote
gmckee
Also that heated bed says it will draw up to 18a@12v. Assuming you are running a traditional controller the bed probably would need an SSR with heatsink to control the power. 18A is over what most of the connectors, fuses, MOSFETs, and other electronics on controllers can handle. You may also need to get a larger power supply rated at 30a@12v to power bed and electronics.

That's an excellent point. I didn't think of that. I was going to run it out of the existing RAMPS1.4, if I recall correctly, the output for the heated bed is 11A, so it won't cut it.