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07-08-2017 #8
Many thanks, i appreciate the advice, i will bear that in mind about the end machining i did not consider that before, only that they might be bent!
Hi Clive, thanks for the pointers! I have as you said decided not to buy the kit, the saving was insignificant and i did not want to be using that breakout board they were supplying anyway. I also questioned why they supply a 36v PSU with the kit, when you look at their higher volt PSU's it states that they are not compatible with the Drivers supplied in that kit...? Seems iffy to me, maybe the drivers are cheap and can't run at the stated specs. I will probably go for those drivers you have mentioned if they come with good recommendation.
Not sure i feel comfortable building my own PSU haha, i will try to find a higher quality alternative.
Ok so, when building my last 3D Printer i had used a chap on Aliexpress to provide me with the ballscrews and everything else associated with them. I compile a list of what i needed this time and first priced it from the UK, so i had a list of what i needed which was going to come to about £690 + Delivery here in the UK, went to aliexpress and returned to the guy who supplied me before and sent me this quote back:
2 x SFU2010- 1200mm with 2pcs nut with end machining=$42
3 x Set BK15 BF15=$24
3 x DSG20H=$6
3 x XB30x40-8x12=$8.46
1 x SFU2010- 712mm with 1pcs nut with end machining=$16.46
1 x SFU1605- 362mm with 1pcs nut with end machining=$10.2
1 x DSG16H=$1.21
1 x Set BK12 BF12=$6.22
1 x XB30x40-8x10=$2.82
Price is $117
Shipping costs is $100 by fedex to UK
Total is $217
Now i honestly could not believe how cheap that was, if i ordered today it would be £166. I got a price from another supplier on there and they quoted ~£340 delivered, would your guy be anywhere near this do you think? Even if they were bent there would be lots of room to play in terms of having them straightened at that price.
Spindle wise, i was going to go for this, unless someone has experience with another:
Click Me
Thanks for the other tips about the motors etc, i like overkill so i think i will stick with them in case of any future needs.
See Below
Yes i like the idea of Aluminium so i think i will definitely go with that after hearing that, proximity sensors are good for me and they are cheap too so i will incorporate them.
I have found a controller that i think i am now going to use:
DDCSV1.1 Controller
I like the idea of just being able to run files external from the laptop so if it's as good as some of the reviews say it is (for the money) then i will probably go with this. I also liked what this guy did with it:
Brainright
Ok, so the Axis is orientated as is to try and get the maximum workable area within that size of frame, i could have made it more central "looking" but in reality its not really central because on one end of the axis the spindle can reach past the machine, and on the other end you have a few hundred mm of area that you cannot reach, this is why i have tried to balance it and make the most of the space available. I'm nt sure of the weight of the spindle but this is obviously very important in order for Solidworks to calculate the centre of mass, i had read online that in general a 2.2Kw spindle will weigh in the region of 5Kg. So i set that as the mass of the spindle and run the evaluation, and it came out pretty well imo, more than acceptable to me, the linear rails and carriages im using are supposed to be high quality so im hoping that they will be fine:
EDIT: Just realised that picture isn't so great, the Centre of Mass appears to be just in front of the left side carriage block, and it also shows a slight angular (right word?) pull, twisting towards the rear of the X Axis. Possibly i could move the right carriage block towards the middle some? This would seriously hurt my OCD of having them space equally.
Thanks Again for all the replies i've already learnt alot so keep that criticism coming :D
AlexLast edited by AlexDoran; 07-08-2017 at 10:10 AM.
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