Purchase Orders for Machine Maintenance

Why Track Maintenance Through Purchase Orders

Every time you replace a laser tube, buy a new build plate for your 3D printer, or pay for a machine service, that is a real cost of running your business. If those costs are not tracked, they are invisible — and invisible costs lead to underpriced products.

Using Purchase Orders to record maintenance spending gives you:

• A clear record of every part or service you have bought for each machine
• Total maintenance cost per machine, over any time period
• Evidence to justify your machine hourly rate calculations
• A history that helps you spot when a machine is becoming more expensive to maintain than it is worth

Example: CO2 Laser Tube Replacement

Your CO2 laser engraver needs a new tube. You order a 60W replacement from your supplier at EUR 180.00.

Steps

1. Go to Purchase Orders and click Create PO.
2. Select your parts supplier from the Supplier dropdown (or add them as a contact first).
3. Set the Order Date.
4. Click Add Item.
5. In the material/item field, enter a descriptive name: CO2 Laser Tube 60W. If this is a one-off part not in your materials list, you can type it as a free-text line item.
6. Enter the quantity (1) and unit price (EUR 180.00).
7. In the Notes field, reference the machine: e.g., Replacement tube for CO2 laser engraver, S/N 4420. Previous tube lasted 14 months.
8. Save the PO.
9. When the tube arrives, mark the PO as Received.
10. Navigate to the machine record in your Machines section and add a maintenance log entry, referencing this PO number.

Linking to the Machine Record

When you add the maintenance entry to the machine profile, link it to the PO by referencing the PO number or entering the cost directly in the maintenance log. This connects the purchase record to the machine's cost history in two places — the PO list and the machine profile — so you can find the information from either direction.

Other Maintenance Use Cases

• 3D printer: New build plate, hotend replacement, belts, lubrication kit
• Sewing machine: Annual service, new needles in bulk, foot attachments
• Jewellery tools: Replacement flex shaft hand piece, burnishing wheels, solder
• General: Any third-party repair invoice — log the supplier, cost, and which machine it covers

Building a Running Cost Picture

Over time, the purchase order history for maintenance-related contacts gives you a real number: what have you spent keeping that machine running? This feeds directly into accurate machine hourly rate calculations and helps you decide when it makes more financial sense to replace a machine than to keep repairing it.