Kevin Welton - WeldyGrindy
The WeldyGrindy team have discussed purchasing a 3-axis DRO for the metal mill, and I volunteered to research options and write this proposal. A DRO will significantly expand the capabilities of the mill, without the need for any extra training beyond the already compulsory induction process.
Having researched a range of sources, I plan to buy the equipment from AliExpress, specifically the machine listed HERE. This kit contains 3 linear scales with a 5 micron accuracy, a digital display, and all cabling/mounting hardware.
There are many, many DRO variants available on AliExpress, which had the lowest prices (even when factoring for VAT). My choice is not the cheapest overall, but it is the cheapest option I could find with a couple of KA-500 scales. In the lengths required to fit the mill, there are two common scale options: the KA-300 and KA-500. Some of the axes on the mill have a limited amount of space for fitting the scales, and I’m concerned that we may have trouble finding enough clearance for a KA-300, which is why I’ve opted to go for the less common KA-500, a slimline scale.
This DRO is to be fitted to the existing metal mill, and will require no additional space. I will perform the installation, with help from other members of the metalwork team.
The listed price is £286.11; while not stated explicitly, my assumption is that this price is exclusive of the VAT which will be due on import, giving an estimated total of £343.32.
There will be no ongoing consumables cost for this device.
Fully funded by Hackspace.
Health & Safety
This will not require any change to the existing risk assessment for the metal mill.
Medium Proposal < £500 - Majority of Board Members and 10 general members
Board Majority Agreed?:
3/5 - yes
- Kevin Welton
- Samuel M.