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--- projects:welcome [2017/11/14 18:36]
jerzydziewierz
+++ projects:welcome [2017/11/14 19:30]
jerzydziewierz
@@ Line 19: / Line 19: @@
 It is likely approx. 40 years old. There is no driver electronics whatsoever, but there is:
 * high precision rails on both axes. No play. No rust, no damage.
-* Linear motors. There are noiseless. Known coil resistance: 14 ohms. Tested working.
+* Linear motors. There are noiseless. Known coil resistance: 14 ohms. Tested working with 2A current, altough, we'd have to test how much can they take before overheating. Ideally, they need onboard temperature monitor.
 * Ultra high precision linear encoders, with sine-cosine output. Tested works at 5V supply.
-* elastic covers to all axes.
+* elastic covers to all axes. This makes it a very pro-looking machine.
 We need to build the servo amplifier and the motion controller for it.
@@ Line 50: / Line 50: @@
 ----------- Risk: Health and Safety from the moving parts ------------
 [2017-11-14]
 [Bob]: H&S?
@@ Line 57: / Line 58: @@
 To mitigate this risk, we could:
-(proposal 1): Build it into a lockable cabinet to make it even more obvious that it is not to be messed with.
-(proposal 2): Instead of a cabinet, we could install a nightlatch on each of the two heavy axes: https://www.ironmongerydirect.co.uk/product/yale-77-traditional-nightlatch-nickel-bronze-603896  ; there is enough space there to install it, and it would prevent people from moving the axes by hand (and trapping their fingers in the process).
+  * (proposal 1): Build it into a lockable cabinet to make it even more obvious that it is not to be messed with.
+  * (proposal 2): Instead of a cabinet, we could install a nightlatch on each of the two heavy axes: https://www.ironmongerydirect.co.uk/product/yale-77-traditional-nightlatch-nickel-bronze-603896  ; there is enough space there to install it, and it would prevent people from moving the axes by hand (and trapping their fingers in the process).
 --------- Risk: How to remove it from the club after the interest wanes out  ------------
- [2017-11-14]
+[2017-11-14]
 [Bob]: In case if the interest stalls, it will be difficult to get rid of it.
@@ Line 67: / Line 69: @@
 [Jurek]: I must agree with this.
 In order to mitigate this risk,
-(proposal 1): I suggest that we start a fund, to be held by the CCA, in which there will be a deposit to cover the machine’s eventual disposal. I guess we might need to find somewhere in range of 300gbp .
+  * (proposal 1): I suggest that we start a fund, to be held by the CCA, in which there will be a deposit to cover the machine’s eventual disposal. I guess we might need to find somewhere in range of 300gbp .
-(proposal 2): Another method might be to get an official quote from one of the scrap metal collectors:
+  * (proposal 2): Another method might be to get an official quote from one of the scrap metal collectors:
 https://www.yell.com/s/metal+collection-glasgow.html
 since there is easily 300kg of metal in this thing, I would guess they might be interested in picking this thing up for free from us.

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