A CNC press brake can be worth considering even if your workshop mainly produces simple components and short runs. The decision depends on how much time you spend setting up, handling parts, correcting bends and repeating previous jobs, together with the full cost of the machine and its supporting equipment.
For a fabricator using a manual backgauge or an older NC press brake, the benefit may come from a more efficient sequence of operations rather than a faster bending stroke. A suitable CNC configuration can bring programmed gauging and bend settings into the same job, helping the operator work through several bends before putting the component down.
Start with the work you already do
Choose a few representative jobs: a simple bracket, a component with several different bends and a regular repeat order. Record the time spent on programming, tooling setup, gauging, handling, first-off inspection and corrections. Include the whole job, from preparation to accepted parts.
This gives you a useful baseline for a demonstration. If the main delay is tooling changeover or moving large sheets, those issues need to be assessed alongside the controller and backgauge. The right machine package should address the bottleneck in your workshop.
How CNC can help with small batches
Our demonstration uses a short run of ten components to explain the difference between completing a batch one bend at a time and working through a programmed sequence on each component.
Where each bend requires a separate setup, an operator may handle all ten blanks for the first bend, put them down, change the settings and then handle them again for the next bend. With four separate operations, that can mean forty separate pickups across the batch.
Where the component geometry, tooling layout and machine configuration allow it, a CNC sequence can let the operator pick up each blank, complete its bends and put it down finished. That can reduce repeated stacking and retrieval, although turning, repositioning and gauging are still part of the work.
The comparison depends on your existing machine. Some NC controls already provide programmed sequences and powered gauging, so establish which tasks are currently manual before estimating a saving.
Watch the CNC press brake demonstration
The video shows an ESA 630 controller and a practical bending example. It illustrates the workflow discussed here; it is not a specification for every current Selmach press brake or controller package.
(While the ESA 630 in this video has now been superseded by the ESA 640, the process remains the same).
Compare programming and setup time
Short runs make setup time particularly important because preparation is spread across fewer finished parts. Graphical programming, a maintained tooling library and saved jobs can help reduce repeated data entry and make recurring work easier to prepare.
Ask to see the complete process: selecting the tooling, entering the component, preparing the sequence, setting the backgauge and approving the first part. Time any corrections as well as the first successful bend.
CAD import, offline programming and simulation depend on the selected controller and software. Confirm what the quotation includes and which file formats and functions it supports. Imported geometry still needs appropriate tools, material information and first-off checks.
Choose a control your team can use effectively
CNC does not mean every workshop needs the most complex controller available. Select the programming functions and gauging movements around your components, operators and production mix.
Training should cover machine operation, tooling, programme preparation, safeguarding and inspection. A saved programme can support repeat production and a more consistent handover between trained operators, but it does not remove the need for competent operation or verification of the finished part.
Assess quality and repeat orders
For regular components, compare first-off approval, programme recall, correction work and the number of accepted parts produced. More consistent output may reduce scrap, fitting adjustments or downstream rework where your trial demonstrates those benefits.
Material variation, springback and tooling condition still affect results. CNC axis positioning alone does not establish a finished-part tolerance, so measure the actual components against their drawings.
Build the investment case from actual costs
Request an itemised quotation covering the machine, tooling, software, delivery, installation, training and site preparation. Include servicing, maintenance, energy and any finance costs in your comparison. Assess the condition and maintenance demands of your existing equipment using its actual history.
Value the expected improvement realistically. Reduced overtime or subcontracting can create a direct saving where those costs are genuinely avoided. Released operator hours may be used elsewhere, while extra machine capacity has commercial value when demand and the rest of the production process allow you to use it.
Avoid counting the same benefit twice. For example, an hour recovered from bending cannot automatically be treated as both a full labour saving and an additional hour of profitable production. Separate cash savings from time and capacity improvements.
A demonstration gives you stronger evidence than a general claim that CNC is quicker or more affordable. Use measured job times and real quotations to decide whether the investment suits your business.
Choose the right press brake for your application
Selmach supplies a range of press brakes for different capacities and production requirements. A straightforward application may suit a simpler configuration, while complex components and demanding repeat work may benefit from additional gauging, programming, tooling or handling options.
The Morgan Rushworth PBXS is our premium CNC hydraulic press brake range. It has four CNC-controlled axes as standard — Y1, Y2, X and R — with an ESA S875 controller. Optional configurations should be selected around the parts you make and the improvements you want to achieve.
Send us your drawings, material grades, thicknesses, maximum bend length and typical batch sizes. Tell us how you currently produce the parts and where time is being lost. We can discuss a suitable configuration, an application-led demonstration and a quotation for your workshop.
Published 21st August 2017