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

**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?

**Desertboy** · 04-09-2017

Originally Posted by Clive S

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.

What wires?

My nema 23 wiring isn't long enough so need to extend it was intending to make sure the soldered connections don't have stresses on them, I was going to use an arduino originally and I will connect it up just to make sure all the axis are moving properly whilst I'm waiting for the AM882's.

Some of my nema's have plugs crimped onto them so I could test the motors but will cut the plugs off and solder the wires.

**Clive S** · 04-09-2017

Originally Posted by Desertboy

My nema 23 wiring isn't long enough so need to extend it was intending to make sure the soldered connections don't have stresses on them, I was going to use an arduino originally and I will connect it up just to make sure all the axis are moving properly whilst I'm waiting for the AM882's.

Some of my nema's have plugs crimped onto them so I could test the motors but will cut the plugs off and solder the wires.

Are they 4 wire or 8 wire steppers

**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?

**A_Camera** · 11-09-2017

Yes, you need 2 hubs and one disc for each screw/motor. Actually you could also make those on your machine, which could save you the costs. I think they are pretty easy to make.