{"id":23,"date":"2014-12-24T21:49:00","date_gmt":"2014-12-24T21:49:00","guid":{"rendered":""},"modified":"2023-01-07T19:34:40","modified_gmt":"2023-01-07T19:34:40","slug":"i-have-decided-that-my-next-printer","status":"publish","type":"post","link":"https:\/\/blog.hslracing.com\/3dprinters\/2014\/12\/i-have-decided-that-my-next-printer.html","title":{"rendered":"Kossel Mini Variant – opening thoughts"},"content":{"rendered":"

I have decided that my next printer will be a delta printer, and although I have come up with numerous designs, the most recent one seems to be verging towards that of a Kossel Mini<\/a>, so why not simply build a variant of one of these and have done with it.<\/p>\n

\"\"<\/a><\/div>\n

Now I could buy a kit of printed parts for $39.99 (\u00a325.76) + $11.81 (\u00a37.61) P&P plus some additional import taxes, but decided instead that since I already have a 3D printer, lets stop being lazy and use that to print the parts and save a few more pennies.<\/p>\n

The aim is to complete the build for under \u00a3200.00, ideally under \u00a3150.00, which I believe is very achievable compared to a purchase price of about $1125.00 (\u00a3721.15) for an off-the-shelf version.<\/p>\n

Cost of PLA printed parts<\/p>\n\n\n\n\n\n\n\n\n\n\n
<\/th>\nFilament<\/th>\nCost<\/th>\n<\/th>\nTotal<\/th>\n<\/tr>\n
Part<\/th>\n(mm)<\/th>\n(cm3)<\/th>\n(\u00a3)<\/th>\nQty<\/th>\n(\u00a3)<\/th>\n<\/tr>\n
Effector<\/td>\n5.139.8<\/td>\n12.4<\/td>\n0.176<\/td>\n1<\/td>\n0.176<\/td>\n<\/tr>\n
Frame Top (20×20)<\/td>\n13704.1<\/td>\n33.0<\/td>\n0.469<\/td>\n3<\/td>\n1.408<\/td>\n<\/tr>\n
Frame Motor (20×20)<\/td>\n34007.6<\/td>\n81.8<\/td>\n1.165<\/td>\n3<\/td>\n3.495<\/td>\n<\/tr>\n
Carriage<\/td>\n5717.9<\/td>\n13.8<\/td>\n0.196<\/td>\n3<\/td>\n0.588<\/td>\n<\/tr>\n
Bowden Extruder<\/td>\n13719.7<\/td>\n33<\/td>\n0.470<\/td>\n1<\/td>\n0.470<\/td>\n<\/tr>\n
Total<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n6.137<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Cost of Vitamins and Electronics<\/div>\n
<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/th>\n<\/th>\nCost<\/th>\n<\/th>\nTotal<\/th>\n<\/tr>\n
Part<\/th>\nSupplier<\/th>\n($)<\/th>\n(\u00a3)<\/th>\nQty<\/th>\n(\u00a3)<\/th>\n<\/tr>\n
20×20 profile 600mm<\/td>\nMotedis<\/a><\/td>\n2.46<\/td>\n1.58<\/td>\n3<\/td>\n4.73<\/td>\n<\/tr>\n
20×20 profile 240mm<\/td>\nMotedis<\/a><\/td>\n0.89<\/td>\n0.57<\/td>\n9<\/td>\n5.16<\/td>\n<\/tr>\n
Slider for 20×20 profile<\/td>\nMotedis<\/a><\/td>\n2.71<\/td>\n1.74<\/td>\n3<\/td>\n5.22<\/td>\n<\/tr>\n
Carbon fibre Tube 5mm OD, 3mm ID, 180mm (6)<\/td>\nRobotdigg<\/a><\/td>\n5.00<\/td>\n3.20<\/td>\n1<\/td>\n3.20<\/td>\n<\/tr>\n
Tie Rods & Ball Joints (12)<\/td>\nRobotdigg<\/a><\/td>\n7.00<\/td>\n4.49<\/td>\n1<\/td>\n4.49<\/td>\n<\/tr>\n
GT2 Belt Loop 1350mm (675 tooth)<\/td>\nRobotdigg<\/a><\/td>\n2.40<\/td>\n1.54<\/td>\n3<\/td>\n4.62<\/td>\n<\/tr>\n
Geared Nema17 Stepper Motor<\/td>\nRobotdigg<\/a><\/td>\n28.00<\/td>\n17.95<\/td>\n1<\/td>\n17.95<\/td>\n<\/tr>\n
Filament Gear Drive<\/td>\nRobotdigg<\/a><\/td>\n4.00<\/td>\n2.56<\/td>\n1<\/td>\n2.56<\/td>\n<\/tr>\n
Nema17 Stepper Motors<\/td>\nEbay<\/a><\/td>\n12.55<\/td>\n8.04<\/td>\n3<\/td>\n24.13<\/td>\n<\/tr>\n
J Head Hot End<\/td>\nEbay<\/a><\/td>\n24.94<\/td>\n15.99<\/td>\n1<\/td>\n15.99<\/td>\n<\/tr>\n
Sanguinololu<\/a><\/td>\nIteadSutdio<\/a><\/td>\n4.68<\/td>\n3.00<\/td>\n1<\/td>\n3.00<\/td>\n<\/tr>\n
ATmega1284P<\/td>\nRS<\/a><\/td>\n7.80<\/td>\n5.00<\/td>\n1<\/td>\n5.00<\/td>\n<\/tr>\n
Step Stick Stepper Drivers<\/td>\nEbay<\/a><\/td>\n2.30<\/td>\n1.48<\/td>\n4<\/td>\n5.92<\/td>\n<\/tr>\n
F623ZZ Bearings<\/td>\nEbay<\/a><\/td>\n0.78<\/td>\n0.50<\/td>\n6<\/td>\n3.00<\/td>\n<\/tr>\n
Total<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n104.97<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

I ordered some\u00a0Sanguinololu<\/a>\u00a0boards from\u00a0IteadSutdio<\/a>\u00a0a while back at $22.00 (\u00a314.10) for 10 boards, the components, are made up from various bulk orders I have made in the past (thousands of resistors for $0.99, thousands of ceramic capacitors for $4.99, hundreds of radial electrolytic capacitors for $8.99, 10 packs of 40 pin headers for $2.99, etc), I boosted the total cost of board plus components to \u00a33.00 to include some decent connectors, rather than just pin headers.<\/p>\n

<\/div>\n
\n

I don’t bother with FDTI chips on the\u00a0Sanguinololu<\/a>\u00a0boards, or the associated components, I either program them via the ICSP header if I need to burn a bootloader, or an external FTDI serial programmer if just updating firmware, I also use bluetooth modules for wireless communications.<\/p>\n

<\/div>\n
M4 or M5 T nuts I buy from Robotdigg<\/a>\u00a0at $7.50 (\u00a34.80) for 100, other nuts, bolts and washers I buy from Orbital Fastners<\/a>\u00a0in quantities of 100 or more. Something like M4x25mm Allen Socket Button Screws<\/a>\u00a0are \u00a33.72 ($5.80) for 100, I just order multiples of 100 as I use them up pretty fast anyway.<\/div>\n
<\/div>\n
As such I will allow a fairly generous figure of \u00a310.00 for nuts, bolts and washers, bringing our total thus far to around \u00a3120.00.<\/div>\n
<\/div>\n
I do not want to use a heated bed, so this will save huge amounts of power and I will be able to use one of my many surplus laptop power supplies as a power source.<\/div>\n
<\/div>\n
The print bed will be an 8mm disc of acrylic that has been sanded on one side to give a frosted appearance, this should allow PLA prints to stick yet still be removable once the print completes – a 175mm disc of 8mm acrylic can be had on Ebay<\/a>\u00a0for \u00a310.70 ($16.70).<\/div>\n
<\/div>\n
\n

I am intending to try the Acetal Slider from\u00a0Motedis<\/a>\u00a0instead of linear rails, I am not aware of anyone trying this idea before, and I have no idea how well it will work – it may have way too much slop to be of any real use, but at only \u00a31.74 ($2.71) per axis, they have to be worth a try.<\/p>\n

\"\"<\/a><\/div>\n<\/div>\n
\n

If this does not work, then I can use their Acetal\u00a0rollers<\/a> instead, these are designed to run in the 6mm slot on the side of the 20x20mm profile, these are \u00a32.67 ($4.17) each, and I would need 9 or more, so I think it is worth the shot on the sliders first, many people have made alternate carriages to run on similar wheels\/rollers, so I should be able to adapt one of these fairly simply.<\/p>\n

\"\"<\/a><\/div>\n<\/div>\n
Then there is always the fallback option of Chinese Linear rails at $58.00 (\u00a337.18) from Robotdigg<\/a>\u00a0for a set of 3 x 400mm rails and carriages.<\/div>\n
<\/div>\n
Even if end up I trying all 3 options, the total cost should still be well below the target of \u00a3200.00.<\/div>\n
<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

I have decided that my next printer will be a delta printer, and although I have come up with numerous designs, the most recent one seems to be verging towards that of a Kossel Mini, so why not simply build a variant of one of these and have done with it. Now I could buy…<\/p>\n","protected":false},"author":1,"featured_media":212,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2],"class_list":["post-23","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorised","tag-mini-kossel"],"_links":{"self":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts\/23","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/comments?post=23"}],"version-history":[{"count":3,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts\/23\/revisions"}],"predecessor-version":[{"id":289,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/posts\/23\/revisions\/289"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/media\/212"}],"wp:attachment":[{"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/media?parent=23"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/categories?post=23"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hslracing.com\/3dprinters\/wp-json\/wp\/v2\/tags?post=23"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}