Cramer's Primo MPCNC

I am planning to use PC watercooling for mine. I do like the configuration of that one you linked though, since it has the pump/res as one unit and seems to come with everything you may need (for sure you’ll need more tubing though, since what’s included looks too short for a primo). Here is what I was planning to use (along with a fan, hose, and 1/4 fittings I already have):

Pump/res:
https://www.amazon.com/ciciglow-Reservoir-Cooling-Thread-Exchanger/dp/B091HW3DCR/ref=sr_1_12_sspa?crid=LGB0BVGQCNVY&keywords=pump+reservoir&qid=1651676226&sprefix=pump+res%2Caps%2C133&sr=8-12-spons&psc=1&smid=A36SBW6YQWAFST&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFSMDlJU0ROQkJCUUomZW5jcnlwdGVkSWQ9QTA4OTQxNjIxTEhRQlVSUkVGWUlSJmVuY3J5cHRlZEFkSWQ9QTAzMjYyMTAzOUMwOUNHVjRPSzZSJndpZGdldE5hbWU9c3BfbXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

120mm rad:
https://www.amazon.com/BXQINLENX-Aluminum-Exchanger-Radiator-Computer/dp/B01D81UPHA/ref=sr_1_11?crid=7AIPV6H6C0O8&keywords=120mm+radiator&qid=1651676359&sprefix=120mm+radiator%2Caps%2C131&sr=8-11

240 rad:
https://www.amazon.com/DIYhz-Computer-Radiator-Aluminum-Exchanger/dp/B08FSV6T7L/ref=sw_ttl_xc_sdp_us_max3_2?_encoding=UTF8&pd_rd_i=B07ZJBHVXT&pd_rd_w=Ml12x&pf_rd_p=fc43292c-798d-42c7-9148-be490e78c1d2&pf_rd_r=5533JRX9B0E58W6XD68C&pd_rd_r=37693951-7319-47da-acce-d203f4c9f754&pd_rd_wg=sE1cG&th=1

A 240 radiator isn’t much extra cost, so I’ll probably go bigger as long as I have a decent place to mount it all.

[edit: Just found this… with the 120mm rad makes for a very affordable setup:

Pump/res combo:
https://www.amazon.com/gp/product/B07QV8T4F8/ref=ox_sc_saved_title_1?smid=A2760MNFACRLA8&psc=1

Also, figured I should mention some folks are using a single start lead screw so their water cooled spindles don’t fall down if power gets cut off (this can destroy valuable parts/materials). Even my relatively light Bosch Colt is enough to make my 4-start lead screw drop pretty fast when I shutoff the z stepper. I’ve even seen some folks use “friction adding” devices to rub on the lead screw to prevent dropping, lol. I think the single start screw is a better idea, but it does require modifying firmware settings (or at least configuring for different steps/mm with fluidnc terminal etc).

Single start leadscrew+nut:
https://www.amazon.com/400mm(15-75-Inches)Tr8x2-Thread-Printer-Machine/dp/B08JLWHG9H/ref=sr_1_3?crid=1WJBPJEF4854O&keywords=single%2Bstart%2Blead%2Bscrew&qid=1651677936&sprefix=single%2Bstart%2Blead%2Bscrew%2Caps%2C143&sr=8-3&th=1

IMHO, most MPCNC should have those on the z axis, since it gives more precision and force, vs the 4-start which are better suited for 3d printing where quick z-hops etc are a good thing and the loadings are very low. CNC benefits from the mechanical advantage of a single start; you get 4x the holding/lifting power with the same motor. We don’t need 4-start to speed up z… even single start can move it too fast.
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