Thread: Fingers crossed it'll cut ally
-
22-11-2010 #111
I thought the forum had something to stop double posting...oops. That's the problem with having a really slow internet connection.
-
22-11-2010 #112
I'm not thinking today am I, you mentioned the driver only a couple of posts ago, sorry!
Plate is the worst possible cross section for bending in the Y direction. Maybe you could securely bolt some bigish aluminium angle to the plate to make it a bit stronger...ideally get it welded on.
All that aluminium profile must have cost a lot.
I intend to look at the servo controller on Wednesday, or this weekend at the latest.
-
22-11-2010 #113
i was thinking a 20mm arch bolted at 90 down the gantry sides, i need to work out where the torsion might be acting... im pretty sure it wont be a staight line top to bottom
All that aluminium profile must have cost a lot
I intend to look at the servo controller on Wednesday, or this weekend at the latest.
-
23-11-2010 #114
Have you had a look at irving's spreadsheet on this? It's interesting comparing the different sections with it.
Yikes, that's a ridiculous price when you compare it to the material cost.
Not quite. According to the website I need at least 100A and 48v ESC, which is going to cost a lot even from hobbyking! I think a lower current ESC should survive as I'll never need that much power. I'm thinking of replacing the mosfets on a really cheap 100A 24v ESC I have for some much higher voltage ones...that should do the trick for very little money.
Alternatively a friend of mine has randomly acquired a 5.5 KW 400v variable frequency motor inverter from a lift. I think it might be adaptable...
-
23-11-2010 #115
try "giant cod"
as cheap as ebay for some stuff
irving's spreadsheet
im not going to use mine at 1700w, i really cant see me needing that much, im not sure the 360w power supply im using will be enough... we'll have to see how it pans out, it would be interesting to see how it dose at 1700w
it has been a real work horse though and the windings dont get very hot
it'll be interesting watching your workshop lights when you fire up that 6000w job :)
-
27-11-2010 #116
Errrr..... has anyone had any experience with wiring home switches to an X axis thats driven with two steppers ?
in mach setup documentation it recomends putting a homing switch on each of the two x-axis drives to correct for lost steps and racking which im getting plenty of as im in the tuning stages of my setup... i only have enough inputs for 3 homing switches and an e-stop on my driver board
how do i conjure up a forth input ???????
-
27-11-2010 #117
A PCI parallel port card would get you plenty more inputs. There's probably a more elegant way to do it though...
Theoretically 3 inputs is enough if you put the switches in series/parallel etc with each X home switch on separate input - it's a matter of if mach3 can handle it. I'd like to know for my router...
I had a look at giant cod (what an odd sentance!). There's some interesting things but it's still a bit more expensive than www.hobbyking.com. Maybe I could use an E-bike controller on my motor.
-
27-11-2010 #118
Jonathan - Just noticed that your after a 100A 48v motor controller, I have got a few kicking around if you want one.
The ones I have take any voltage from 24 up to 48 and also can cope with anything up to 200A, fully programmable through 3 buttons on the front.
Let me know if you want some more information.
Oh, and I am sure the price will be right!
-
27-11-2010 #119A PCI parallel port card would get you plenty more inputs.
im not going down the "series/parrallel" route with switches, homing and soft limits makes the most sense to my eyes
Just noticed that your after a 100A 48v motor controller
-
27-11-2010 #120
Mark i have not used a slaved axis but you can have all limits on one input, then maybe just the slaved axis on a separate input.
To anyone who wants more IO i use a PoKeys device http://www.poscope.com/product.php?pid=3
I have control panel with hardware buttons controlled through this device even does Speed and feed override via pots, MPG's etc
Phil
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
Similar Threads
-
laser cutting ally plate
By i2i in forum Tool & Tooling TechnologyReplies: 12Last Post: 21-02-2013, 08:47 AM -
FOR SALE: 45 by 90 ally profile
By johngoodrich in forum Items For SaleReplies: 5Last Post: 13-09-2011, 06:45 PM -
RFQ: anyone wanna quote me to cut some ally?! and....
By robmurf in forum Projects, Jobs & RequestsReplies: 2Last Post: 01-09-2010, 01:16 PM -
NEW MEMBER: anyone wanna quote me to cut some ally?! and....
By robmurf in forum New Member IntroductionsReplies: 2Last Post: 01-09-2010, 10:31 AM -
Model Engineering Exhibition @ Ally Pally
By irving2008 in forum General DiscussionReplies: 6Last Post: 18-01-2009, 10:15 AM
Bookmarks