Auto calibration deviation issues

[dc42]

Yes I was aware that Replikeo was closing down. I guess it's for similar reasons as RepRapPro - it's hard to sell a 3D printer kit with reasonably good electronics when so many other companies are using the cheapest Arduino/RAMPS clone they can get.

[Dougal1957]

Yes indeed

[Monster Delta]

would linear slide rails do the trick such as these
http://www.ebay.co.uk/itm/4-Slide-Blocks-CNC-2pcs-SBR16-750MM-2-Rails-16mm-Linear-Supported-Bearing-Rail/381994760987?_trksid=p2385738.c100677.m4598&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3D4a459123553142738778f8b38685ce4f%26pid%3D100677%26rk%3D4%26rkt%3D50%26sd%3D172148325863

or do they have to be guide rails

[dc42]

On a delta printer you need to prevent the carriages twisting about the movement axis, so you need either 2 of those slider rails per tower, or 1 linear guide. I used the 750mm long versions of these http://www.robotdigg.com/product/971/440C-SUS-Linear-Rail-MGN12-1H-680-or-MGN12-1H-750.

[DjDemonD]

1m rails plenty to chose from. https://m.aliexpress.com/search.htm?keywords=Mgn12h+1000mm#/ When you get these clean them with solvent like brake cleaner especially in the rail groove in the side, drown them in lithium grease, check all the bearings are the same size and that there is a space of one bearing in the row. Do this over a tray. Don't mix carriages and rails - they are matched, unless deliberately, after marking them, you might get a smoother combination. If you need bearings measure them and buy some you might have to order an imperial size. Sounds like hassle but you save around half the money if not more compared to German or Japanese rails.

[reahax]

@dc42 said in Auto calibration deviation issues:

PCB effector

Hello,

I have cheap carbon arms at the moment,
I'm thinking to upgrade 215 Haydn's Carbon Fiber Arms (200mm bad sized delta)

I also interesting with pcb smart effector, it is compatible with small size delta ?
Thanks.

[dc42]

Ths Smart Effector has an overall size of around 85mm and it uses a spacing between the parallel rods of 56 55mm. If this is larger than your existing effector, then you may need to reduce the printable diameter to avoid the effector fouling on the belts.

[reahax]

Thank you. first I have to try Haydn's Arms without smart effector then.

[fcwilt]

@dc42 said in Auto calibration deviation issues:

Ths Smart Effector has an overall size of around 85mm and it uses a spacing between the parallel rods of 56mm. If this is larger than your existing effector, then you may need to reduce the printable diameter to avoid the effector fouling on the belts.

Hmm...

I seem to recall seeing a diagram of the SE which gave the arm spacing at 55mm.

Frederick

[dc42]

You are right, it it 55mm.