Well checking the FEDEX tracking number Chai gave me and my ball screws are in France at the moment!
Remembering Kingcreaky's build thread where he got different ball nut housings than he thought he was getting I asked Chai for the data sheet. Good job I did as they are different from what I thought I'd be getting (best ask before ordering next time just to make sure!) so I'd best re-draw them and adjust the mounting points accordingly...
I'm drawing up the gantry plates at the moment in Draftsight so should have some CAD models soon. I'm in two minds whether to do the end plates with slots in so the top/bottom/front plates are located in the end plates (remember seeing something like that on a build you did for someone) or whether to fit the end plate on square to the ends and have less machining?
Yes I'm waiting to get all the bits in my grubby paws before doing the final drawings just for that reason, so I can check all components are as they should be...
OK Chaps a couple of questions if I may. I'm rapidly pulling all the bits together and just want to check that I'm not going to start this build and then just when I get going come to a grinding halt because I've overlooked something! Below is a list of what I have and what I think I still need to get. Can you take a look at it and suggest what else I've forgotten please?
Items already purchased
1000mm x 800mm x 20mm Aluminium Plate (eBay)
2200mm x 950mm x 10mm 6082 Aluminium plate (eBay)
X axis 20mm NSK linear rails 1300mm long & 4 carriages (eBay)
Y axis 15mm THK linear rails 750mm long & 4 carriages (eBay)
Z axis 15mm THK linear rails 440mm long & 4 carriages (eBay)
NEMA 23 3Nm steppers x 3
AM882 drivers x 3
PDMX 126 BOB
X axis ballscrews x 2 1325mm long with Ballscrew, ballscrew housing and Fixed and floating end bearings and housings (Chai)
Y axis ballscrews 750mm long with Ballscrew, ballscrew housing and Fixed and floating end bearings and housings (Chai)
Z axis ballscrews 415mm long with Ballscrew, ballscrew housing and Fixed and floating end bearings and housings (Chai)
1 set of ER16 collets 2mm through to 10mm (Chai)
2.5m of IGUS 15 series 36mm x 24mm energy chain (eBay)
6 off mechanical limit switches (also have 6 off PNP Proxy switches in case I want to use them instead of mechanical switches) (eBay and couworkgh)
Homemade 1.7kW brushless outrunner spindle (Me!!)
100mm x 50mm x 4mm 7.5m length of steel
50mm x 50mm x 4mm 7.5m length of steel
50mm x 25mm x 4mm 7.5m length of steel
24V 47A (twin server PSUs) PSU for the spindle
75A ESC & Servo tester for the spindle
Items to be purchased
PSU (parts as will make one)
CY cable (will ask our works electrician if he has any going spare )
Cable Tray (as above)
5mm pitch HTD Pulleys and belts (lengths of belts still to be fixed)
Bespoke Z axis Ballnut mount (one of you hopefully??!!)
Epoxy for levelling the X axis rail beds
Spindle mount to be machined (again one of you hopefully??!!)
Various size taps for tapping all the holes
There are more bits that I think I need but at the moment I can't think....that's where you experienced chaps come in
Good electrical cabinet to put it all in and trunking to separate power and signal cables etc.
Now start building and stop over thinking because you'll never account for everything and plans will change has you go along.!!
Last edited by JAZZCNC; 30-09-2013 at 04:09 PM.
Nuts bolts etc I'll get from one of my works suppliers...
Its a low profile one to fit between the Z axis plates without more machining, I'll put a pic up later if I've got one at home.
PSUs are Dell server PSUs which you can pick up off eBay. Normally twinned to get 24V by floating the earth on one and putting in series...or so I'm led to believe!
I'll ask our electrical engineer to get me a cabinet, probably a Sarel one as well as the trunking...
Will be starting the frame once the steel gets here which hopefully will be in the next day or so. Will get it cut up before work and at lunch and then start the welding bit by bit. Can't do it at home as no 16A sockets :(
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