New build with recycled parts on a ridiculous budget 120cm*60cm work area

**Nickhofen** · 01-09-2017

Nice! :-)
I see an extra bolt laying in the extrusion groove, what kind of sorcery is that?Lol !

**Desertboy** · 01-09-2017

Originally Posted by Nickhofen

Nice! :-)
I see an extra bolt laying in the extrusion groove, what kind of sorcery is that?

I never even noticed that lol would explain the rattling noise the extrusion was making when I trying to get it into the gantry mounts which was not easy.

I had the plates recessed 5mm either side so the extrusion sits tight inside the aluminium plate, I had it made to a tight fit. Trying to get it on was not easy lol but once it slipped into the recess it was super tight and very nice! Top work Chaz making the plates and top work KJN aluminium for cutting the aluminium so accurately.

You can see the recess better on the picture Chaz took ;) The Hiwin's were meant to recess into the plate as well but I got the measurements slightly off and they didn't so rather than try and ground the plate out I chopped 1.5cm off the Hiwin's and then they don't need to be recessed.

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And Nice one Zeeflyboy on the plate advice I used 20mm tooling plate for the gantry mounts, 15mm tooling plate for the back of the Z axis and 20mm tooling plate for the front of the Z axis. The rest was made from recovered aluminium (Nema mounts, BK12/BF12 mounts & spacers). I cannot believe I was going to go with 3mm steel for the gantry mounts that would have been pointless exercise in futility.

**Desertboy** · 01-09-2017

Stupid question probably but where do I use the circlip that came with the BK12/BF12 fittings? Not seen any decent vids on how to actually assemble the ballscrew & fittings seems easy enough but the circlip is confusing me lol.

I'm guessing the circlip goes the floating end? But could have done with some instructions lol.

**Clive S** · 01-09-2017

Originally Posted by Desertboy

Stupid question probably but where do I use the circlip that came with the BK12/BF12 fittings? Not seen any decent vids on how to actually assemble the ballscrew & fittings seems easy enough but the circlip is confusing me lol.

I'm guessing the circlip goes the floating end? But could have done with some instructions lol.

On the floating end of the screw BF end there is a groove for the circlip that goes on after the bearing. The the BF block will slide on the bearing and should sit about half way in. The reason is so that if the screw expands it can do so at the BF end as the bearing will slide in the block.

**Desertboy** · 02-09-2017

Assembled a bit more started to think about energy chain placement.

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there's 2 bolts in the BK12 mounts that bolt into T nuts but 1 of them is counterbored and under the BK12, The A2's are then upside down and bolted from above was difficult to do forgot I meant to change the A2 bore to a captive nut but worked out ok in the end. Every bolt has a non slip washer under it.

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**Desertboy** · 04-09-2017

My AM882'S have being ordered today delivery time is quoted at 7 to 12 working days, so looking at the PSU next.

Does anyone know how the stall protection works? Looking at the manual it sets a pin high until power reset? in which case I could make it work with the Arduino but got a breakout board and a core duo with a parallel port to run linux cnc on.

Went 2nd hand (Cheapest on ebay) of course lol
http://www.ebay.co.uk/itm/Used-AM882...AAAOSwe-FVAS~f

4 of them, 2 reasons this has quick shipping (1-2 weeks) the new ones at ~£65 have 4-6 weeks shipping and well I save almost £70 which will pay nicely for the PSU and buy a couple more breakout boards (£3 each should buy spares).

They offer a year's warranty which is pretty much worthless lol but I bet they'll be fine for many years to come unless my wiring is dodgy. Going to solder my wires to extend them and make sure the soldered points do not move!

**Clive S** · 04-09-2017

Does anyone know how the stall protection works? Looking at the manual it sets a pin high until power reset? in which case I could make it work with the Arduino but got a breakout board and a core duo with a parallel port to run linux cnc on.

Why would you even consider an Arduino What are you going to drive it with? Remember a simple BOB will only have 5 inputs. You will need two for slaved homing that means three left unless you put two PP's in the PC.

Going to solder my wires to extend them and make sure the soldered points do not move!

What wires?

**A_Camera** · 11-09-2017

Originally Posted by Desertboy

I suggest you replace those couplers before you start using your machine with Lovejoy/Oldham couplers. The one you have now are going to cause you trouble and eventually snap.

**Desertboy** · 11-09-2017

Originally Posted by A_Camera

I suggest you replace those couplers before you start using your machine with Lovejoy/Oldham couplers. The one you have now are going to cause you trouble and eventually snap.

I have got them on the list of things to do but I think it'll be a month or 2 before I can afford them need to buy the bits for my mates arcade table first so will probably use these couplings till after xmas and look at upgrading then. I can do the motor's at same time and only have to buy the hubs once.

I think I got the nema's aligned straight enough for oldham couplings.

http://www.arceurotrade.co.uk/Catalo...dham-Couplings

I'm guessing I have to use 2 hubs and a torque disc?